hi dan the plastic water pump impeller problem is well documented here in the uk, but i have been in the motor trade for over thirty years now and i recognise a good technician when i see one don't beat your self up over this one, as they say the man who never made a mistake never did any thing. your still the one i will continue to follow.
Hey Paul glad to see that you admitted that you were wrong that's what we as Automotive technicians need that type of honesty because we're not perfect because of your honesty and your skill level I will continue to support your Channel
Hi Paul, another indication of a faulty water pump can be the interior heater not getting hot enough due to lack of water flow through the heater hoses. Love these videos of yours, it's great to be learning something new every day.
It's the nature of the beast when you work on every automotive make. The 'common problems' of one particular car sometimes get overlooked. Mr. Danner, you're still the man! and we still can take valuable information away from that video. Thanks!
That's awesome Paul! We are all learning together. I had no clue about VW water pump impellers until 2007. I got my but kicked on one. Lol! Those water pumps are so deep beneath the timing belt and have no access to test. I worked at an independent European garage. The owner was a genius and a great mentor. Thanks for covering this one. Water pump impellers are rare but they do go bad. They are a major player and are always over looked. I had a Buick 3.8 have an impeller go bad only after the head gasket finally failed. It loosened up after it reached maximum temperature. It was an intermittent problem. Man that was tricky. I also had a GM fan switch skew about 8 degrees. The fans would kick on slightly late, causing the expansion ratio of the coolant to exceed the cap pressure and lose a few ounces of coolant into the overflow just before the fan kick on. Then it would drop and behave normally. The customer would commute to work 5 days a week. It would take a week for it to actually be 1/3 gallon low causing it to boil and gauge reading hot. The over flow would put coolant on the highway half way to work so I would never see any coolant anywhere. Finally my infrared thermometer exposed the sensor reaching 235 degrees before the fan come on. I will always use my thermometer from now on as a courtesy check.
Also, read my comment on part 3. You mentioned how your first boss Joe challenged you to explain"Why." I explain "why" those impellers fail in that comment. Observe the VW block. With the water pump removed. You can see the casting and shape of the cylinders. It becomes an "oven" when coolant is low.
Hey Paul, Watch you channel all the time. 12 years in the field on my end. Appreciate all you do man. Been burned before on these VW's just a little info that hopefully will be helpful. You can remove the t-stat and you can actually see the water pump impeller which is plastic. If you can finagle you finger or a hook tool or possibly into that area you can actually move the impeller. The impeller should not move on the pump shaft because the drive for the pump is secured by the timing belt. If the impeller moves or rotates or can be spun it's a bad pump no doubt. The impellers are plastic on the original pumps and are pressed onto a steel shaft. Just thought I'd put this out there for anyone who may get stuck or have the joy of dealing with a VW overheat, no heat, or no cooling fan operation issue. Thanks again for posting and taking the time you do to put stuff together for professionals do it yourselfers alike.
I have changed quite a few of these I have always found the plastic impeller unbounded and spins freely on the shaft, the original part has the plastic impeller. I fit a quality aftermarket which has a metal impeller and never had another problem and always changed the cambelt at the same time, my preference is gates but that's just me. I always look forward to your videos, thank you.
Part 3 is a good idea on this car in my opinion. A verifiation and a confirmed fix really completes the whole process. Especially for an issue we dont see too often. Thanks for all you do and keep em coming!!
We learn something from you in every video, Paul. In this one, we learned how important it is to correct bad info...and that might be the most important thing you can teach us. We must all learn from each other... all the time! That is, or at least should be, the real world!
Great video and test procedures as always! Been in the field 22 years and still every days a school day! Have your e-book nearly a year now and just subscribed to premium! One word....excellent.
dont feel bad paul, that another thing that we have to learn from you, admit our mistake when we did something wrong , that is the way we could get better everyday, thank you for everything you share with us , good bless you, and your family
Mr danner don't feel bad , we are humans and we all make mistakes, your lesson in the first video was very good and my self learned a lot from it,thank you for all.
You are the one of the best instructor i have seen in my life , you have very good knowledge , awesome attitude and the way that you explain to us very easy and nice thanks allot keep it up and we appreciate you work, Mustafa from Iraq regards ,
As I watch your videos, more and more, I look up to you more... as a technician and as a person. Doing a great job sir. Side note: seem to have some awesome parenting, as well.
I'm loving your work. Don't take my or any of the other comments bad. Were here to share. I can pretty much guarantee that most of the comments were made by European people were this car is a very common sports hatch. I would love for us to be wrong but the GTI sufferers from a common water pump issue and Ive seen it more than a few times (not to say this is a correct diagnostic). I appreciate your videos and Ive learned a massive amount from you. Keep up the good work and if your boy is interested teach him along the way.
Hey Paul love your videos!!!! A part 3 wouldn't be bad at all. Don't feel bad everybody makes mistakes that's what makes us human. You admitting it shows me you're an awesome technician!
I just wanted to say you are not only knowledgeable , you are awesome at making the information clear and easy to understand. Also nailing the parent thing for sure!! And your son is obviously an AMAZING WHIZ KID!! Thanks for sharing, =).
Hi Danner just on a side note the water pumps in WV cars dont always look defective at first glance you need to remove the water pump and grip both side then twist in opposite direction you may find that the plastic side will not move and the pulley side will . Good vids as always
nice VID BRO & your SON, IT happens a lot of after- Market --"WATER PUMP " Are not designed correctly, even when they are made to push the water through , they don't , it states it word for word in the Shop Manual , Make sure the water pump is identically the same , or you will have Issues . but your right , in a Close System , how do you check for Flow ??
It's funny I had a jeep commander with a overheating issue.my cause was a bolt wedged on the backside of the water pump impeller and housing.i guess we learn something new everyday.you go through the motions from day to day with what we do as technicians.sometimes we just need to go back to a sub system to think about the basics and the theory.Paul we enjoy your videos and your great knowledge you share with us all.through the good and sometimes the challenging .we all learn something from you.now let's getter done.
I have heard of this on the forums ..I drive a TDI Jetta and have driven diesel Jetta for I think close to 30 years . I never experienced this problem thank goodness, i always change the water pump when I do the suggested timing belt ect . I try to get a good water pump in the kit from a dealer that specializes in vw . Thanks for all you do .. . There is a couple of forums I use to help me out including your web sight
Hey Paul another great vid and good by pass testing whole electrical circuit in one. As for the water pump I work in UK at vw garage and these are common we upgrade to metal impellers then they don't seem to fail again. When replacing the thermostat you cab put your finger in and feel the impeller as it's just to the left of the stat I feel one for the previous garage to do next time. Cheers for the vw video nice to see
Paul the schematic looked like the sensor did a whole lot more than switch - on- off - hi- low, was there a code for low temp coolant at the rad. VW has a code for just about every possible fault . I seen a VW code P1654 "nut behind the wheel" never did figure that one out. Way over my head but just curious if a code was set.
Hey Paul..great follow up. I like the idea that some others have commented on about seeing more follow ups and confirmed fixes. It really helps to round out the whole diagnostic process. Mulligan granted ;)
Great Scannerdanner! Admitting mistakes is real bravery. We are respecting you, you may respect other people automotive channels also even though their effort is small enough compared to you.
In Europe almost every car has a sealed cooling system and it has been around for some time now. The small hose going back to the expansion tank is a "steam" or bleed hose. In Sweden we call it a "gossip - tube" although it is not a tube. And gossip because it kind of gives the thermostat away if it is open or not. There should be good flow when engine is hot. On some design perhaps a little bit when cold.
I watched that first video and I would have done the same thing. I've never seen the broken/cavitated water pump in my whole career, yet. In fact, it's barely even on my "list of overheating failed parts order." You learn from your mistakes, but I get to learn from yours'. Thanx Dan.:) Luv ya dude
Hi.Scanner...don't wanna rain on ur ..but did bust the connector when removing connector plug as tab looked missing as you said it took a while to get off?? These engines very common for the impellor falling of the pump spindle...& slapped wrist for bad procedure info..lol
We all need a reminder to get back to the basics sometimes. Keeps us humble and reinforces good habits and adds to our experience. It's really obvious how bad you felt about it too man. We're owed a couple mistakes as often as unforeseen events happen (i.e. starter motor failing after installing a battery), this business can be stress on top of stress.
Hey Paul, I followed your diagnostic steps on the fan for the same car. However, the high fan would not go on. Unfortunately, I already replaced the temp control switch and the module as well. Still the high fan would not turn on both ignition on/off. The low fan does work. there is continuity on the circuit on both hi/lo. what am I missing here
Hi Paul, in your defence you did say the thermostat had been changed and one would assume someone somewhere along the line would have run it up and checked it, I have had plastic water pump impellas fall off or break, on BMW's, normally pattern or after market ones, originals normally metal usually ok, I had one Brithsh car one that had a stuck shut thermosotat, the sensor was on the engine, so the fan was blowing a stone cold radiator all the time....Fred in Sunny England
Oops. Oh well, we all do it from time to time. More than once I had the suspicion I missed something and it kept me awake till it came to me at 1:00AM. Hard way to learn, by mistakes, but the best because we will never forget them again. Good example that you always have to cover all bases, but no apologies necessary. If we were all perfect, the world would be pretty boring, and we would be out of a job. Keep the faith!
Tell your friend to NOT!! use the Green Coolant!!! It HAS to be the correct coolant for these aluminum engines. (I know it's expensive, but this subject has been HOTLY debated over at the Beetle Forum I'm a member of. Each time the coolant is cross contaminated or "Mixed"...It can start building up a lot of crud)
Don't sweat it bro, I've seen a few techs get bitten by bad impellers. Mulligan granted! To be honest, I think I might have misdiagnosed one recently (poor heat at idle issue - low flow maybe?). Went with the old TSB on the older Taurus heater core. Hasn't come back yet (fingers crossed). Thanks for the update, and the Edo plug.
I had two of these last summer. The first was a bear to diagnose, but the second was easy as pie. On the last one, we never did find any remnants of the impeller.
Thought id throw this out there... We had a a 05 town and country come into our shop today with a similar issue found the water pump impeller spinning freely on the pumps shaft.
Hey, I learned from your part 1 even if it wasn't the fix. Thank you for sharing. Mistakes is how we learn, and for me, I've always tried as much as possible to learn from other people's mistakes to avoid my own....lol, of course I learn from my mistakes too. No implying here, just thank you. On to part 3.2002 VW GTI Overheating (possible causes) Part 3
Paul, you are the man. Thanks for the update video. These things happen. Props to you for making the correction for us. If you have some free time, I have some questions. What exactly was happening? the block was getting hotter than the radiator? I would think a good way to check is with the fans off, thermostat open, the temps should be pretty close. If not, is it possible the new thermostat is defective? Ive had quite a few bad ones even from the dealers
OK, so what happens if jumping the wires does NOT turn on low speed or high speed (which if I understand needs to be done with ign On) Does this now point to the fan relay switch under the car?
To check for a faulty waterpump you may wanna turn the heat and the blower motor to max. If there was no water circulating, there will be little to no heat output :-)
thank you bro.. my vr6 jetta 2.8l was boiling my antifreez and my water container cap was bad... fan not working at all. i try your test. and it was the temp. sensor. the one on the radiator. thanks again.
ok ScannerDanner I followed your tests on part one and found that the fans would work on the high speed side when I jumped them and you could hear the relay kick in and out. But, when I tested the low speed side the fans did not run, nor did I hear the relay kick closed. So since you left us in the dark about what to do in this scenario, I am assuming that the low speed fan control relay is faulty and that I need to replace it. Correct? I wish you would have walked us through more stages of this diagnostic procedure and the what if's that can occur, even though they didn't happen to your particular application.Not trying to pester you but a little more input would be helpful. Think of me like Johnny 5, "INPUT". Thank you though and great video.
We are all human. things happen. You are still my automotive electronics superhero! lol Now we all know to check coolant temperature when diagnosing this type of problem. No big deal, don't be so hard on yourself about it.
I replaced the switch as per the other video as I thought it might be the culprit. it's not I also shorted the high and low speeds so the fans work. checked all fuses both on battery box and drivers side they're all good. I'm thinking it's the fan control module. any help in troubleshooting would be great :)
ScannerDanner you are amazing electrical and mechanical very handful man! can you help me please with my problem? its very similar but more electical, there are fuse box on battery the right side fuse 30a are cooling fan this fuse very HOT and for long ride its burn my fuse box( there are 2 new fun but different brands + new controler fun/relay/ECU fun and unit on the radiator new HELLA so the question what can make it so HOT to burn fuse box???? thanks to every body for any advice guys!
sorry i forgot to say wich car it is its very popular engine 1.6 AKL SEAT Cordoba 2001 6k2 its placed on VW, Audi, Skoda 1.6 AKL the same one with little different
Resistance in the fuse box itself. Poor or corroded contacts with that fuse is what is making it hot. Unless current flow is very high and almost to fuse blowing amperage. But my money is on corrosion
It's great to admit your mistake , when you didn't even have to. I make mistakes too, it happens. I had an overhead cam 3.0 Taurus beat me one time, it was overheating , and turned out to have a broken impeller . I've also seen inline 6 BMWs do the same thing.
Great video! I always learn something from your videos. Good to see your son! I hope he becomes an engineer so he can design cars that are easier to work on like not putting coils under an intake manifold. LOL
I have an 02 golf gti. It starts to over heat when I'm in stop and go traffic. I followed part one and it worked for a few days, now my low speed fan works but the high don't. Where might I start to find the problem? Any help will be much appreciated.
My test would have involved heating the switch in a jug. That would have shown me it was working. causing me to look elsewhere for cooling issue. However verifying coolant flow and rad temp seems much easier :)
check the heat off the car interior heater blower as water runs though this at all times when set to full hot if no heat of heater as engine heats you have no flow or no coolant going in and out of heater matrix
you were asked to diagnose an inop cooling fan...you did exactly what was asked of you. correctly i might add. i can only assume the a/c wasnt functioning on this car or the fans would have cycled on with the clutch. as for the suspect impeller...weve seen dozens of them. pull a heater hose and hit the throttle and youll know for a fact.
This video is a great example of what's needed in the world today to avoid deep despair for our young: Definitions: Ego is identity. It is a story we tell ourselves, like a cloak we wear. It's like a metal shell we carry around us.. not unlike a car?? Then, if we make our opinions part of who we are.. any advice or differing opinions will feel like an existential threat. It's not. You are not this story you tell yourself about who you are. Let your fictional, romanticized story dent, and die. In this case, it was being humble and free of ego defense reflexes to listen and share a very small oversight which I bet you would not have if not shooting the video with a helper to teach along the way . Look, if you didn't make this video (and teach a future "KNIGHT against entropy" at the same time).. I wouldn't have added to the check list for figuring out that it's likely wiring or the computer which is keeping my tested good auxiliary fan on my 2000 Eurovan from spinning. That idea was indeed.. see if that $150 scantron gauge I have can tell me the temp at the radiator.. by unplugging the connector you showed and seeing if the temp readout goes away. As a former electronic engineering, I learned something about how electronics are laid out in cars. This is my year to learn auto repair while others are losing their work ethic forever? elsewhere opinions with new information.. as any scientist would. To stick with any theory despite what your eyes clearly see? That's not science.. that's religion.
In Europe this is a big problem with Vw water pumps the impeller doesn't break up it just free wheels on the shaft. Vw know about this problem and if you bring it to the dealership they will give you a new pump for a discounted price, totally stupid really why not just redesign the pump?
hey Dan need to pick your brian on this one had VW bug same motor in shop weird overheating issue would overheat intermittently you could drive 50+ miles then over heat next time drive 10 miles overheat anyhow customer did blow head gasket was replaced, head sent to machine shop checked and decked ,water pump replaced twice, theromsat replaced numerous times, raditator changed, coolant temp sensor replaced, fan switch replaced, fans wired direct temporary. always came back same result when it overheated radiator would be cold motor hot chemical test for hydro carbons none. we were lost. Was no rhyme or reason to the over heating car ended up going to auction but still bothers me that couldn't figure it out. any ideas????
Hey Paul love watching your video's always learning something...But after watching so many of them I was wondering why you never start off with checking the fuse's then check the relay then check the relay wire socket . from there you can check the wiring to power to the fans to the computer and to the sensors or switch. you can even run the fans from the socket and that will tell were the fault might be if its electrical.. Have you seen "The Hook" by power pro its a great tester it a bit pricey but you can get one for under 300.00 but worth every penny.. :) check out the video's of it here at utube or at the powerpro com the one that starts off as "Snap-on power-probe the hook" keep up the great work.
You Help me the first video and second video helpt me with on other car Thank you You’re asome looking forwards for onother video that you can help with🦾
Its your humility,the ability to say your wrong that makes you a great automotive technician.
hi dan the plastic water pump impeller problem is well documented here in the uk, but i have been in the motor trade for over thirty years now and i recognise a good technician when i see one don't beat your self up over this one, as they say the man who never made a mistake never did any thing. your still the one i will continue to follow.
Hey Paul glad to see that you admitted that you were wrong that's what we as Automotive technicians need that type of honesty because we're not perfect because of your honesty and your skill level I will continue to support your Channel
Don't feel bad Paul, takes a bigger man to admit you over looked something. Remember we learn something every day!
Hi Paul, another indication of a faulty water pump can be the interior heater not getting hot enough due to lack of water flow through the heater hoses.
Love these videos of yours, it's great to be learning something new every day.
It's the nature of the beast when you work on every automotive make. The 'common problems' of one particular car sometimes get overlooked. Mr. Danner, you're still the man! and we still can take valuable information away from that video. Thanks!
That's awesome Paul! We are all learning together. I had no clue about VW water pump impellers until 2007. I got my but kicked on one. Lol! Those water pumps are so deep beneath the timing belt and have no access to test. I worked at an independent European garage. The owner was a genius and a great mentor. Thanks for covering this one. Water pump impellers are rare but they do go bad. They are a major player and are always over looked. I had a Buick 3.8 have an impeller go bad only after the head gasket finally failed. It loosened up after it reached maximum temperature. It was an intermittent problem. Man that was tricky. I also had a GM fan switch skew about 8 degrees. The fans would kick on slightly late, causing the expansion ratio of the coolant to exceed the cap pressure and lose a few ounces of coolant into the overflow just before the fan kick on. Then it would drop and behave normally. The customer would commute to work 5 days a week. It would take a week for it to actually be 1/3 gallon low causing it to boil and gauge reading hot. The over flow would put coolant on the highway half way to work so I would never see any coolant anywhere. Finally my infrared thermometer exposed the sensor reaching 235 degrees before the fan come on. I will always use my thermometer from now on as a courtesy check.
Also, read my comment on part 3. You mentioned how your first boss Joe challenged you to explain"Why." I explain "why" those impellers fail in that comment. Observe the VW block. With the water pump removed. You can see the casting and shape of the cylinders. It becomes an "oven" when coolant is low.
Hey Paul,
Watch you channel all the time. 12 years in the field on my end. Appreciate all you do man. Been burned before on these VW's just a little info that hopefully will be helpful. You can remove the t-stat and you can actually see the water pump impeller which is plastic. If you can finagle you finger or a hook tool or possibly into that area you can actually move the impeller. The impeller should not move on the pump shaft because the drive for the pump is secured by the timing belt. If the impeller moves or rotates or can be spun it's a bad pump no doubt. The impellers are plastic on the original pumps and are pressed onto a steel shaft. Just thought I'd put this out there for anyone who may get stuck or have the joy of dealing with a VW overheat, no heat, or no cooling fan operation issue. Thanks again for posting and taking the time you do to put stuff together for professionals do it yourselfers alike.
I have changed quite a few of these I have always found the plastic impeller unbounded and spins freely on the shaft, the original part has the plastic impeller. I fit a quality aftermarket which has a metal impeller and never had another problem and always changed the cambelt at the same time, my preference is gates but that's just me. I always look forward to your videos, thank you.
Part 3 is a good idea on this car in my opinion. A verifiation and a confirmed fix really completes the whole process. Especially for an issue we dont see too often. Thanks for all you do and keep em coming!!
We learn something from you in every video, Paul. In this one, we learned how important it is to correct bad info...and that might be the most important thing you can teach us. We must all learn from each other... all the time! That is, or at least should be, the real world!
Great video and test procedures as always! Been in the field 22 years and still every days a school day! Have your e-book nearly a year now and just subscribed to premium! One word....excellent.
dont feel bad paul, that another thing that we have to learn from you, admit our mistake when we did something wrong , that is the way we could get better everyday, thank you for everything you share with us , good bless you, and your family
Mr danner don't feel bad , we are humans and we all make mistakes, your lesson in the first video was very good and my self learned a lot from it,thank you for all.
You are the one of the best instructor i have seen in my life , you have very good knowledge , awesome attitude and the way that you explain to us very easy and nice
thanks allot keep it up and we appreciate you work,
Mustafa from Iraq
regards ,
Thank you Mustafa!
I respect you even more Mr.Danner.....
From a humble soldier in your legion of techs...:) :) :)
Used these videos today. Appreciate your work years later.
As I watch your videos, more and more, I look up to you more... as a technician and as a person. Doing a great job sir. Side note: seem to have some awesome parenting, as well.
I'm loving your work. Don't take my or any of the other comments bad. Were here to share. I can pretty much guarantee that most of the comments were made by European people were this car is a very common sports hatch. I would love for us to be wrong but the GTI sufferers from a common water pump issue and Ive seen it more than a few times (not to say this is a correct diagnostic). I appreciate your videos and Ive learned a massive amount from you. Keep up the good work and if your boy is interested teach him along the way.
Hey Paul love your videos!!!! A part 3 wouldn't be bad at all. Don't feel bad everybody makes mistakes that's what makes us human. You admitting it shows me you're an awesome technician!
Send us a part 3 Paul. I think we all would like to see the fix on this.Thanks again .
I just wanted to say you are not only knowledgeable , you are awesome at making the information clear and easy to understand. Also nailing the parent thing for sure!! And your son is obviously an AMAZING WHIZ KID!! Thanks for sharing, =).
Lia Taylor thanks Lia!
Hey Paul, what you just did on this video created more respect for you. Awesome and thank you.
Hi Danner just on a side note the water pumps in WV cars dont always look defective at first glance you need to remove the water pump and grip both side then twist in opposite direction you may find that the plastic side will not move and the pulley side will . Good vids as always
Plastic impellers don't like the wrong type of coolant.
nice VID BRO & your SON, IT happens a lot of after- Market --"WATER PUMP " Are not designed correctly, even when they are made to push the water through , they don't , it states it word for word in the Shop Manual , Make sure the water pump is identically the same , or you will have Issues . but your right , in a Close System , how do you check for Flow ??
It's funny I had a jeep commander with a overheating issue.my cause was a bolt wedged on the backside of the water pump impeller and housing.i guess we learn something new everyday.you go through the motions from day to day with what we do as technicians.sometimes we just need to go back to a sub system to think about the basics and the theory.Paul we enjoy your videos and your great knowledge you share with us all.through the good and sometimes the challenging .we all learn something from you.now let's getter done.
I have heard of this on the forums ..I drive a TDI Jetta and have driven diesel Jetta for I think close to 30 years . I never experienced this problem thank goodness, i always change the water pump when I do the suggested timing belt ect . I try to get a good water pump in the kit from a dealer that specializes in vw . Thanks for all you do .. . There is a couple of forums I use to help me out including your web sight
Do part 3! we don't mind you talking! thanks!
Keep up the good work. We're all learning here.
Hey Paul another great vid and good by pass testing whole electrical circuit in one. As for the water pump I work in UK at vw garage and these are common we upgrade to metal impellers then they don't seem to fail again. When replacing the thermostat you cab put your finger in and feel the impeller as it's just to the left of the stat I feel one for the previous garage to do next time. Cheers for the vw video nice to see
Paul the schematic looked like the sensor did a whole lot more than switch - on- off - hi- low, was there a code for low temp coolant at the rad. VW has a code for just about every possible fault . I seen a VW code P1654 "nut behind the wheel" never did figure that one out. Way over my head but just curious if a code was set.
Hey Paul..great follow up. I like the idea that some others have commented on about seeing more follow ups and confirmed fixes. It really helps to round out the whole diagnostic process. Mulligan granted ;)
That is the best when we recognized our mistakes ,you a good man.
Great Scannerdanner! Admitting mistakes is real bravery. We are respecting you, you may respect other people automotive channels also even though their effort is small enough compared to you.
In Europe almost every car has a sealed cooling system and it has been around for some time now. The small hose going back to the expansion tank is a "steam" or bleed hose. In Sweden we call it a "gossip - tube" although it is not a tube. And gossip because it kind of gives the thermostat away if it is open or not. There should be good flow when engine is hot. On some design perhaps a little bit when cold.
My highest respect to this guy!
You had a honesty to agree the faults Paul, good luck
I watched that first video and I would have done the same thing. I've never seen the broken/cavitated water pump in my whole career, yet. In fact, it's barely even on my "list of overheating failed parts order." You learn from your mistakes, but I get to learn from yours'. Thanx Dan.:) Luv ya dude
thanks Darren!
Hi.Scanner...don't wanna rain on ur ..but did bust the connector when removing connector plug as tab looked missing as you said it took a while to get off?? These engines very common for the impellor falling of the pump spindle...& slapped wrist for bad procedure info..lol
We all need a reminder to get back to the basics sometimes. Keeps us humble and reinforces good habits and adds to our experience.
It's really obvious how bad you felt about it too man. We're owed a couple mistakes as often as unforeseen events happen (i.e. starter motor failing after installing a battery), this business can be stress on top of stress.
Hey Paul, I followed your diagnostic steps on the fan for the same car. However, the high fan would not go on. Unfortunately, I already replaced the temp control switch and the module as well. Still the high fan would not turn on both ignition on/off. The low fan does work. there is continuity on the circuit on both hi/lo. what am I missing here
Hi Paul, in your defence you did say the thermostat had been changed and one would assume someone somewhere along the line would have run it up and checked it, I have had plastic water pump impellas fall off or break, on BMW's, normally pattern or after market ones, originals normally metal usually ok, I had one Brithsh car one that had a stuck shut thermosotat, the sensor was on the engine, so the fan was blowing a stone cold radiator all the time....Fred in Sunny England
Oops. Oh well, we all do it from time to time. More than once I had the suspicion I missed something and it kept me awake till it came to me at 1:00AM. Hard way to learn, by mistakes, but the best because we will never forget them again. Good example that you always have to cover all bases, but no apologies necessary. If we were all perfect, the world would be pretty boring, and we would be out of a job. Keep the faith!
Tell your friend to NOT!! use the Green Coolant!!! It HAS to be the correct coolant for these aluminum engines. (I know it's expensive, but this subject has been HOTLY debated over at the Beetle Forum I'm a member of. Each time the coolant is cross contaminated or "Mixed"...It can start building up a lot of crud)
Thanks so much Mr scanner for your best information in automotive engineering.
Don't sweat it bro, I've seen a few techs get bitten by bad impellers. Mulligan granted! To be honest, I think I might have misdiagnosed one recently (poor heat at idle issue - low flow maybe?). Went with the old TSB on the older Taurus heater core. Hasn't come back yet (fingers crossed). Thanks for the update, and the Edo plug.
So what ended up being the issue with the GTI...water pump?
I had two of these last summer. The first was a bear to diagnose, but the second was easy as pie. On the last one, we never did find any remnants of the impeller.
Thought id throw this out there... We had a a 05 town and country come into our shop today with a similar issue found the water pump impeller spinning freely on the pumps shaft.
Hey, I learned from your part 1 even if it wasn't the fix. Thank you for sharing. Mistakes is how we learn, and for me, I've always tried as much as possible to learn from other people's mistakes to avoid my own....lol, of course I learn from my mistakes too. No implying here, just thank you.
On to part 3.2002 VW GTI Overheating (possible causes) Part 3
There is flow at the small hose at all times...hot or cold.
Paul, you are the man. Thanks for the update video. These things happen. Props to you for making the correction for us. If you have some free time, I have some questions. What exactly was happening? the block was getting hotter than the radiator? I would think a good way to check is with the fans off, thermostat open, the temps should be pretty close. If not, is it possible the new thermostat is defective? Ive had quite a few bad ones even from the dealers
goodone! was it the impeller or the mini belt driving the stand alone waterpump? (non timingbelt driven...) :)
OK, so what happens if jumping the wires does NOT turn on low speed or high speed (which if I understand needs to be done with ign On) Does this now point to the fan relay switch under the car?
WHAT IS THE TEMP THAT THE FAN SHOULD TURN ON AND WHAT TEMP IS THE THERMOSTAT
To check for a faulty waterpump you may wanna turn the heat and the blower motor to max. If there was no water circulating, there will be little to no heat output :-)
My son's vw overheats and did the check you did with fans but fans don't come on but module keeps clicking when I touch the contacts
I'm sorry but this video is so old that I remember nothing about this system. Power and ground testing on the fan itself would be my next step
What was the mileage on this VW? water pump should've been replaced with the timing belt kit at 105k miles.
thank you bro.. my vr6 jetta 2.8l was boiling my antifreez and my water container cap was bad... fan not working at all. i try your test. and it was the temp. sensor. the one on the radiator. thanks again.
ok ScannerDanner I followed your tests on part one and found that the fans would work on the high speed side when I jumped them and you could hear the relay kick in and out. But, when I tested the low speed side the fans did not run, nor did I hear the relay kick closed. So since you left us in the dark about what to do in this scenario, I am assuming that the low speed fan control relay is faulty and that I need to replace it. Correct? I wish you would have walked us through more stages of this diagnostic procedure and the what if's that can occur, even though they didn't happen to your particular application.Not trying to pester you but a little more input would be helpful. Think of me like Johnny 5, "INPUT". Thank you though and great video.
+troy riddle sorry man, next one I get like this I will do so
We are all human. things happen. You are still my automotive electronics superhero! lol Now we all know to check coolant temperature when diagnosing this type of problem. No big deal, don't be so hard on yourself about it.
I replaced the switch as per the other video as I thought it might be the culprit. it's not I also shorted the high and low speeds so the fans work. checked all fuses both on battery box and drivers side they're all good. I'm thinking it's the fan control module. any help in troubleshooting would be great :)
Brody Moodley did you ever figure this out
To be continue.... Is there a part 3? Lol hey Dood awesome videos keep them coming been learning a lot from your videos.
ScannerDanner you are amazing electrical and mechanical very handful man!
can you help me please with my problem?
its very similar but more electical, there are fuse box on battery the right side fuse 30a are cooling fan this fuse very HOT and for long ride its burn my fuse box(
there are 2 new fun but different brands + new controler fun/relay/ECU fun and unit on the radiator new HELLA
so the question what can make it so HOT to burn fuse box????
thanks to every body for any advice guys!
sorry i forgot to say wich car it is its very popular engine 1.6 AKL SEAT Cordoba 2001 6k2
its placed on VW, Audi, Skoda 1.6 AKL the same one with little different
Resistance in the fuse box itself. Poor or corroded contacts with that fuse is what is making it hot. Unless current flow is very high and almost to fuse blowing amperage. But my money is on corrosion
the easyest way to check if the water pump works is to turn the heater on.
Thanks a million you have great information and super representation. I do alot of my own repairs. Sandra
WP on VW can get you if it is your first time. That is what I specialize on Euros.
It's great to admit your mistake , when you didn't even have to. I make mistakes too, it happens.
I had an overhead cam 3.0 Taurus beat me one time, it was overheating , and turned out to have a broken impeller . I've also seen inline 6 BMWs do the same thing.
Great video! I always learn something from your videos. Good to see your son! I hope he becomes an engineer so he can design cars that are easier to work on like not putting coils under an intake manifold. LOL
Nicely done again, and still great testing methods for the electric part of it, cant always be electrical :P
I have an 02 golf gti. It starts to over heat when I'm in stop and go traffic. I followed part one and it worked for a few days, now my low speed fan works but the high don't. Where might I start to find the problem? Any help will be much appreciated.
did you get an answer to your question? im having the exact same issue
Post this question to my forum. Sorry but that's the best I can offer right now.
www.scannerdanner.com/forum#/general-repair-questions/
Post this to my forum for additional help. Thank you!
www.scannerdanner.com/forum#/general-repair-questions/
My test would have involved heating the switch in a jug.
That would have shown me it was working. causing me to look elsewhere for cooling issue.
However verifying coolant flow and rad temp seems much easier :)
check the heat off the car interior heater blower as water runs though this at all times when set to full hot if no heat of heater as engine heats you have no flow or no coolant going in and out of heater matrix
Thank you for clearing this up!
Glad it was helpful!
plastic impeller water pump from euro always breaks
You are the best.....doit the part 3...please
Thanks tooooo much for valuable information Mr sanner
you were asked to diagnose an inop cooling fan...you did exactly what was asked of you. correctly i might add. i can only assume the a/c wasnt functioning on this car or the fans would have cycled on with the clutch.
as for the suspect impeller...weve seen dozens of them. pull a heater hose and hit the throttle and youll know for a fact.
Thanks to you Paul
This video is a great example of what's needed in the world today to avoid deep despair for our young:
Definitions:
Ego is identity. It is a story we tell ourselves, like a cloak we wear. It's like a metal shell we carry around us.. not unlike a car?? Then, if we make our opinions part of who we are.. any advice or differing opinions will feel like an existential threat. It's not. You are not this story you tell yourself about who you are. Let your fictional, romanticized story dent, and die.
In this case, it was being humble and free of ego defense reflexes to listen and share a very small oversight which I bet you would not have if not shooting the video with a helper to teach along the way .
Look, if you didn't make this video (and teach a future "KNIGHT against entropy" at the same time).. I wouldn't have added to the check list for figuring out that it's likely wiring or the computer which is keeping my tested good auxiliary fan on my 2000 Eurovan from spinning. That idea was indeed.. see if that $150 scantron gauge I have can tell me the temp at the radiator.. by unplugging the connector you showed and seeing if the temp readout goes away.
As a former electronic engineering, I learned something about how electronics are laid out in cars. This is my year to learn auto repair while others are losing their work ethic forever?
elsewhere
opinions with new information.. as any scientist would. To stick with any theory despite what your eyes clearly see? That's not science.. that's religion.
I imagine him saying "it was a bad call" with burk's voice from Aliens
In Europe this is a big problem with Vw water pumps the impeller doesn't break up it just free wheels on the shaft. Vw know about this problem and if you bring it to the dealership they will give you a new pump for a discounted price, totally stupid really why not just redesign the pump?
hey Dan need to pick your brian on this one had VW bug same motor in shop weird overheating issue would overheat intermittently you could drive 50+ miles then over heat next time drive 10 miles overheat anyhow customer did blow head gasket was replaced, head sent to machine shop checked and decked ,water pump replaced twice, theromsat replaced numerous times, raditator changed, coolant temp sensor replaced, fan switch replaced, fans wired direct temporary. always came back same result when it overheated radiator would be cold motor hot chemical test for hydro carbons none. we were lost. Was no rhyme or reason to the over heating car ended up going to auction but still bothers me that couldn't figure it out. any ideas????
Did you ever figure this one out?
@@Franklinveterinarycenter1of4 no the car was sent to a auction and we put the customer in a different car
Thanks for the update!
thanx for all your video :)
Hey Paul love watching your video's always learning something...But after watching so many of them I was wondering why you never start off with checking the fuse's then check the relay then check the relay wire socket . from there you can check the wiring to power to the fans to the computer and to the sensors or switch. you can even run the fans from the socket and that will tell were the fault might be if its electrical.. Have you seen "The Hook" by power pro its a great tester it a bit pricey but you can get one for under 300.00 but worth every penny.. :) check out the video's of it here at utube or at the powerpro com the one that starts off as "Snap-on power-probe the hook" keep up the great work.
its common for the water pump to bust or freewheel
the new ones are metal not plastic
use infared thermometer easy check
@Paul U are my hero.
Meant Thomas EXO, typing on touchscreen
In the last video, his son ask about the radiator not being hot. I need to go check my pump.
Proverbs9;8 Reprove not a scorner, lest he hate thee: rebuke a wise man, and he will love thee.
we all make mistakes
thank you so much
Thank you!
PART 3 PART3 !!!
Thank you for share
You the man!!
You Help me the first video and second video helpt me with on other car Thank you
You’re asome looking forwards for onother video that you can help with🦾
Thanks man!
lots of bimmers have plastic impellers also.