I had the same problem, opened the reservoir cap after driving it home from work, released some air pressure from the reservoir. Needed more dexcool and added more ( half a gallon ) . No more overheating after that.
Mines started overheating at 96,000 miles, thought exchanging the fluid and thermostat would solve the problem but nope. One thing I learned from this particular model (06-11 DTS) is once it starts overheating with mileage over 60k, REPLACE EVERYTHING that has to do with the cooling system! Water pump, thermostat, radiator, fluid exchange, etc... Will fix the problem 100% and worth it
Just replaced my water pump as well as the upper radiator hose. I noticed the old hose was sitting on top of the valve cover and would get really hot so the hose was weak and spongy from the heat. Hope that solves the problem. Other upkeep things such as replacing the thermostat and the temp sensor in the reservoir tank as well as clean out the smaller hoses and fittings.
Check the passenger side floorboard. If the carpet is wet, the heater core may be leaking. If the head gaskets are ok and you don't see an external leak, that may be where the coolant is going.
@@jimmycruiserr ruclips.net/video/6l4_5f3SoV4/видео.html I'm not sure if this Northstar design is still the same buy I found this jusy a few videos up from yours. Best of luck
@@willnewman7485 Yes it funny how people buy new GM cars and never change the coolant. Then when the HG blow and the coolant gum up. They blame the dex-cool.
Very thankful for your videos It is not easy to chase down these problems. Off to Harbor Freight for the pressurizer pump tool you showed in your March video. Keep up the good work.
Glad I could help!! :) Yes, that coolant system pressure tester will be your best friend when it comes to these leaks lol, I've already got quite a bit of use out of it since this! Thanks for watching :D
i been thinking on buying a caddy found out everyone sez the v6 is junk and the northstars overheat now i found a video on youtube a guy had a problem with overheating with a north star the is a metal line that runs along the side of the motor passenger side i believe i know one end goes to the reservoir guy pulled that line off it was completely clogged guy couldn't get it unclogged he put a hard plastic clear line in place seems to be good to go me my self id probly just run a small drain snake or a coat hanger threw the metal line then blow it out with air compressor curious to see if your car overheats again and what your problem will be
Hello how are you Jimmy I have a 06 Buick lucerne that has the 4.6L v8 cadillac northstar in it and I'm pour alotta coolant in my and my coolant jug goes empty I dont know where my coolant is going to
@@187Doug Blown headgaskets , there is a host of issues that come wth this, just replacing them will need the engine to be taken out. H replaces the headgaskets all the time, every time I talk to him or drop by his shop there is an engine out and when I ask what happened he says "same old shit" I stopped asking already because I wiuld say 70% of his business is that.
@ If you have a car with a Northstar, then its time to upgrade years and get out of the Northstar engine because its crap. the 2.0t are trash too and have issues. Just stick with the 3.6 engines.
The Caddyyyy.... My aunt 2009 DTS ran a little hot and it turned out to be the water pump was going out and been fine since then all done by GM at the dealership... Hope it's something simple
Yes, the Caddie is back haha! I was going to look at the water pump on this too, but I forgot we already replaced it back when we did the heads. Hope it's just a simple hose too! Thanks man :D
People who buy 50/50 anti-freeze are slow. I buy 100% and make my own. Yes I know about the distill water and whatnot. My Trailblazer has had Dex-cool and tap water for over 4 years now.
Its funny you should have this problem, because my father and I have been recently going through the exact same problem in our 1961 Cadillac Fleetwood with a 390 V8. Its not as prevalent during the cold winter but it has been a problem during these past months down here in Florida. We're hoping its not a leaking head gasket because there are no signs of external leaking or anything which is very odd. The last time the coolant disappeared it took almost 3 gallons of distilled water. I don't know if you found the problem here or not but its funny how both our Cadillac's are experiencing the exact same problem. We've never had an overheating problem ever before on any of our cars or Cadillac's until now on the 61.
I have the same car even color this goof yard had the dexcool in it mine was switched over a long time ago. On that head gasket he took out you could see the damage that shit causes. Leave the beauty cover off the engine. Heat destroys those engines.
its not like its the original fill man. after the original crap is gone and flushed he'd be better off with any other coolant. they all protect aluminum and iron.
My 06 dts was changed too green a long time ago Rex cool was clogging some of those ports on that old gasket you could see it. This kid wasn’t looking for it or even noticed
Mine did that what it would do is go up slowly after 15 min of driving then ot would go down back to half mark so i took to ahop it was low on coolant its a really nice car im 3rd owner car from florida it is super clean 65k miles i have the paper for it too that was in side window when you go into show room retailed for that year around 50k i know the mans son who baught from him car is flawless black and putting rims on couple weeks
i have the same issue with my 07 Dts. You think it might be the fan relays? My temperature gauge will sometime rise just under the red line, then drops...what u think?
ME TOO!!!!!!!! if you ever find it let me know! i did block test aleady and it has a new water pump, i'm gonna go through it with a fine comb tomorrow and see if i can see a leak
Kowalskithegreat I notice if the radiator reservoir coolant is not filled at the full mark line, the temp gauge will run high. That what i notice on my car.
+kevin kool : Surge tank is to be filled half way up when cold on these cars. It's a sealed pressurized system. Any coolant leaks will cause overheating.
I got rid of mine before the problems hahah don't forget to clean the key chip 👍the Northstar has a something I forget what it's called to do with the cooling like a valve or something I remember my 95 Seville I did the radiator and plugs and thermostat and wires and basically everything then found it but already sold it... The radiator is crap on these mine randomly went bad and was gushing
Lol perfect timing! I think I know of the issue you're talking about, I forgot exactly what it was too lol. We had to put a radiator in ours a long time ago too 😂
@Brian Ross if, after the head gasket job he mentioned, it got a good flush, the coolant type doesn't matter from then on. any decent mechanic, after a major cooling system related repair and flush. wouldn't do the customer the disservice of putting dexcool back in the car. much better more cost effective and convenient options today than dexcool. also alot of times the universal yellow will have a green tinge even though it mixes with all the other stuff. although i'm not betting on this engine for long anyways after the half assed head gasket job he described they did.
@@garonburwell9008 Owners manual says use dexcool. Any other coolant may cause overheating problems and may require additional additives to the coolant- Owners manual says this. Dexcool flush service is only $150-$190 at the GM dealer which is about the same price as regular shops that use the wrong stuff.
@@TeeroyHammermill ok my flush service is less money to the customer, and a better job, and uses better coolant. very easy for me to sleep at night. get your service wherever you want its a free country
It is the ballast turn the lights off they back on bingo lights come on. This guy should not be giving advice on shit he has no clue about. Glad he’s learning but advice no
Did your flunke brother drill and retap the threads you never posted that part but everything else.. I think you didnt yime to pull the motor again or Click bait for views and $$
Have 96 eldorodo like new condition running hot first 1200 takes it home have 5000 investment in car 215 971 5646 phila pa 100,000 miles on car 99 point car
I had the same problem, opened the reservoir cap after driving it home from work, released some air pressure from the reservoir. Needed more dexcool and added more ( half a gallon ) . No more overheating after that.
Mines started overheating at 96,000 miles, thought exchanging the fluid and thermostat would solve the problem but nope. One thing I learned from this particular model (06-11 DTS) is once it starts overheating with mileage over 60k, REPLACE EVERYTHING that has to do with the cooling system! Water pump, thermostat, radiator, fluid exchange, etc... Will fix the problem 100% and worth it
Just replaced my water pump as well as the upper radiator hose. I noticed the old hose was sitting on top of the valve cover and would get really hot so the hose was weak and spongy from the heat. Hope that solves the problem. Other upkeep things such as replacing the thermostat and the temp sensor in the reservoir tank as well as clean out the smaller hoses and fittings.
Mines? Stoopy.
The dexcool is there because thats what you're supposed to use for a cadillac dts
These engines love to overheat, it's what they do best!
Ironic that cadillac marketed these back in 93 as being able to drive 50 miles without coolant- if only they knew how many times this would be tested
Had the same problem on my 11 DTS. Changed out the thermostat and the temps were back to normal.
What type of bolts did you use. Best is to stud it and then they are bullet proof.
Check the passenger side floorboard. If the carpet is wet, the heater core may be leaking. If the head gaskets are ok and you don't see an external leak, that may be where the coolant is going.
Great thought! It would have never occurred to me to check the core lines, wouldn't surprise me if there's just a small leak somewhere. Thanks dude :)
Eric Ernst my passenger carpet floor gets wet all the time so does the heater core make my car overheat?
@@jimmycruiserr ruclips.net/video/6l4_5f3SoV4/видео.html
I'm not sure if this Northstar design is still the same buy I found this jusy a few videos up from yours.
Best of luck
Hey man. You have an iron block with aluminum heads. There is special antifreeze for that. YOU HAVE TO USE DEX-COOL antifreeze.
No you don't have to use Dex in it. Any coolant formulated for aluminum motors is just fine. Just make sure you charge it every two years.
@@lancedukel3436 that's funny because I use dex cool in my 06 DTS. It says it on the coolant cap so I usually dont go out of my way to change it
Who told you the block was iron?
@@willnewman7485 Yes it funny how people buy new GM cars and never change the coolant. Then when the HG blow and the coolant gum up. They blame the dex-cool.
Please listen to Keith!!! Only use Dex-Cool bud. He know what he’s talking about. That’d be why you have a bunch of Dex in the garage.
Very thankful for your videos It is not easy to chase down these problems. Off to Harbor Freight for the pressurizer pump tool you showed in your March video. Keep up the good work.
Glad I could help!! :) Yes, that coolant system pressure tester will be your best friend when it comes to these leaks lol, I've already got quite a bit of use out of it since this! Thanks for watching :D
I know these take the orange coolant. So idk if that’s your issue
And as far as the head gaskets. These models had already had the issue fixed during manufacture.
Love the DTS, keep us posted!
Will do!! :D
Invest in a good coolant pressure tester with the adaptors to test various cars.
i been thinking on buying a caddy found out everyone sez the v6 is junk and the northstars overheat now i found a video on youtube a guy had a problem with overheating with a north star the is a metal line that runs along the side of the motor passenger side i believe i know one end goes to the reservoir guy pulled that line off it was completely clogged guy couldn't get it unclogged he put a hard plastic clear line in place seems to be good to go me my self id probly just run a small drain snake or a coat hanger threw the metal line then blow it out with air compressor curious to see if your car overheats again and what your problem will be
Hello how are you Jimmy I have a 06 Buick lucerne that has the 4.6L v8 cadillac northstar in it and I'm pour alotta coolant in my and my coolant jug goes empty I dont know where my coolant is going to
Hey man I have the same exact car year and color, and I'm having the same problem. Aren't you suppose to use Dex Cool?
if you gave it a real flush so your not mixing, use whatever antifreeze you like. they all protect aluminum.
I know a guy who has a shop and he ONLY services Cadillacs. He knows the Northstar V8's in particular and told me to never buy a car with that engine.
Je nsz how come?
@@187Doug Blown headgaskets , there is a host of issues that come wth this, just replacing them will need the engine to be taken out. H replaces the headgaskets all the time, every time I talk to him or drop by his shop there is an engine out and when I ask what happened he says "same old shit" I stopped asking already because I wiuld say 70% of his business is that.
@@jensz9360where’s he located
@ If you have a car with a Northstar, then its time to upgrade years and get out of the Northstar engine because its crap.
the 2.0t are trash too and have issues. Just stick with the 3.6 engines.
why did you switch from dexcool to green engine coolant ? dexcool was oem fill from dealer ?
The Caddyyyy.... My aunt 2009 DTS ran a little hot and it turned out to be the water pump was going out and been fine since then all done by GM at the dealership... Hope it's something simple
Yes, the Caddie is back haha! I was going to look at the water pump on this too, but I forgot we already replaced it back when we did the heads. Hope it's just a simple hose too! Thanks man :D
Channel C.G.E. what ever happened??
So what was the fix?
People who buy 50/50 anti-freeze are slow. I buy 100% and make my own. Yes I know about the distill water and whatnot. My Trailblazer has had Dex-cool and tap water for over 4 years now.
I make my own as well......imma save me that 12.00 dollars
You're not filling that tank to the top are you? Half full when cold is the proper level.
it'll purge
Its funny you should have this problem, because my father and I have been recently going through the exact same problem in our 1961 Cadillac Fleetwood with a 390 V8. Its not as prevalent during the cold winter but it has been a problem during these past months down here in Florida. We're hoping its not a leaking head gasket because there are no signs of external leaking or anything which is very odd. The last time the coolant disappeared it took almost 3 gallons of distilled water. I don't know if you found the problem here or not but its funny how both our Cadillac's are experiencing the exact same problem. We've never had an overheating problem ever before on any of our cars or Cadillac's until now on the 61.
Hose could. Have pinhole only leak under pressure ?
I have the same car even color this goof yard had the dexcool in it mine was switched over a long time ago. On that head gasket he took out you could see the damage that shit causes. Leave the beauty cover off the engine. Heat destroys those engines.
What part of the border did you cross? I’ve never seen that amount of snow I mexico 🇲🇽
Use only Cadillac/GM coolant, specific into this Northstar engine, That Only!!!!
its not like its the original fill man. after the original crap is gone and flushed he'd be better off with any other coolant. they all protect aluminum and iron.
True, the orange soda is garbage.
My 06 dts was changed too green a long time ago Rex cool was clogging some of those ports on that old gasket you could see it. This kid wasn’t looking for it or even noticed
Mine did that what it would do is go up slowly after 15 min of driving then ot would go down back to half mark so i took to ahop it was low on coolant its a really nice car im 3rd owner car from florida it is super clean 65k miles i have the paper for it too that was in side window when you go into show room retailed for that year around 50k i know the mans son who baught from him car is flawless black and putting rims on couple weeks
i have the same issue with my 07 Dts. You think it might be the fan relays? My temperature gauge will sometime rise just under the red line, then drops...what u think?
ME TOO!!!!!!!! if you ever find it let me know! i did block test aleady and it has a new water pump, i'm gonna go through it with a fine comb tomorrow and see if i can see a leak
Kowalskithegreat I notice if the radiator reservoir coolant is not filled at the full mark line, the temp gauge will run high. That what i notice on my car.
+kevin kool : Surge tank is to be filled half way up when cold on these cars. It's a sealed pressurized system. Any coolant leaks will cause overheating.
It could be a stuck thermostat. I've had this happen a few times before causing an overheating condition.
I just went through this. I own an 07 DTS. It turned out to be the crossover bar that goes from the intake to the radiator....$1674.00
My car has full pressure they say and full of fluid , but over heats when idling too long ! Any ideas ?? Thanks.
Fans not coming on likely. That was my issue. Changed coolant temperature sensor and that was that
I got rid of mine before the problems hahah don't forget to clean the key chip 👍the Northstar has a something I forget what it's called to do with the cooling like a valve or something I remember my 95 Seville I did the radiator and plugs and thermostat and wires and basically everything then found it but already sold it... The radiator is crap on these mine randomly went bad and was gushing
Lol perfect timing! I think I know of the issue you're talking about, I forgot exactly what it was too lol. We had to put a radiator in ours a long time ago too 😂
Love the vids buddy...I have a 2010 dts tht need value cover gasket done! Do you have a vid on that?
That's strange. Hopefully it's just a hose.
That's what I'm hoping for! Thanks for watching dude :D
no more caddy videos?
This car Dex-Cool only… Orange color!
Mine just overheated on me yesterday I just replaced the alternator too idk what to do man I’m scared 😂😂
OMG, you went through a head gasket replacement and did not install new studs! Did you not research the real problem? Ouch....
that problem was fixed back in 2004.
Drain that coolant out and replace with DEX-COOL ASAP brotha.
drain and flush the coolant out and fill it with whatever coolant you like!
I thought Dex-Cool was the worse
I watched the first video but my question is did u make sure the block was true an the head was Aswell due to overheating they could have warped
Wrong antifreeze bro
.....oohhhh nooooo Buddy !!!
All of a sudden it's 0 degrees in Mexico?? You may fool the fuzz, but you're not fooling me.
“Crossed over the border into Mexico” 😂
You put the heads on backwards😎
WHY ARE YO USING GREEN ANTIFREEZE . ABIG NO NO IN THIS ENGINE!!
@Brian Ross if, after the head gasket job he mentioned, it got a good flush, the coolant type doesn't matter from then on. any decent mechanic, after a major cooling system related repair and flush. wouldn't do the customer the disservice of putting dexcool back in the car. much better more cost effective and convenient options today than dexcool. also alot of times the universal yellow will have a green tinge even though it mixes with all the other stuff.
although i'm not betting on this engine for long anyways after the half assed head gasket job he described they did.
@@garonburwell9008 Owners manual says use dexcool. Any other coolant may cause overheating problems and may require additional additives to the coolant- Owners manual says this. Dexcool flush service is only $150-$190 at the GM dealer which is about the same price as regular shops that use the wrong stuff.
@@TeeroyHammermill ok my flush service is less money to the customer, and a better job, and uses better coolant. very easy for me to sleep at night. get your service wherever you want its a free country
Its really not that big of a deal what coolant you use in this car. I run water in mine lol.
@@raleigh2747 this car gave up on me at 113000. Bought at 77 .took care of it and still blew the headgaskets.smh
Thanks
Leaking into the exhaust you won’t see it
Smell the exhaust. It will smell sweet.
it's the water pump belt
The northstar engine only takes dexcool u shouldnt be using 50 50 EVER with this engine
It is the ballast turn the lights off they back on bingo lights come on. This guy should not be giving advice on shit he has no clue about. Glad he’s learning but advice no
wow Joe Jonas fixes his own car
Did your flunke brother drill and retap the threads you never posted that part but everything else.. I think you didnt yime to pull the motor again or Click bait for views and $$
💪💪👍
Sorry man, thumbs 👎👎👎.... Way too much excessive info that I don't wanna know ... Didn't even make it halfway through the video.
Have 96 eldorodo like new condition running hot first 1200 takes it home have 5000 investment in car 215 971 5646 phila pa 100,000 miles on car 99 point car
lol what?
All the Cadillac cars suck they all over heat
north star engines are shit!
Lol! They definitely have their reliability issues.... to say the least 😂
Dex Cool sucks....do your homework. The manual says use Dex...fuck that manual. That shit destroys your engine and clogs