Things that might help with a project like this: Duramax Water Pump: amzn.to/2Cc9hy2 Water Pump Housing: amzn.to/2SHcJYy Flywheel Lock Tool Kit: amzn.to/2M5oqGc This video contains affiliate links, which means that if you click on one of the product links and buy, I'll receive a small commission.
ok, here's the easy way to get the balance bolt off......get a short 36mm 12-point socket and a harbor freight earthquake xt stubby 1/2" impact.....fits in perfectly between radiator and bolt... that's what i use at my shop,,,,no need for flywheel holding tools, etc.
Doing my water pump today. I got as far as the balancer bolt. My 1/2" breaker broke. Waiting till Monday to get 3/4" breaker. Thanks for all the information you gathered to make this video. I've got all my torque specs thanks to you! I'm also recording my experience with this pump. I will be sure to mention you in my video. I know myself how time consuming the whole recording process can get. Your effort is much appreciated!
Thanks for the video. I can't say it was easy, but your video helped me through it. I just completed a water pump, both thermostats, and a fuel pressure regulator. Took about 2 good days working through it. Saved myself around $1500 from the estimate I got. Thanks again.
The pitting on the pumps is not corrosion, it's cavitation. Mine had that, Reused it without problems. The welded waterpump is what I went with as well
Just looked it up and it makes sense. I guess I saw the rust on the water pump and figured that is what happened. It is still damage to the housing and should be replaced. For $77 it is not worth taking the chance.
yeah, no ideas why you have rust in there, are you running straight water in it? Reused mine, didnt see it before ordering and it's not like it'll hurt the cooling capacity or like it would break and explose.
I don't really know how the rust got there. I use 50/50 dexcool/water. I know our water will cause rust stains so maybe that is what happened. With most of the coolant out of the truck I went with distilled water and dexcool this time.
Veikra Now that I think about it the truck sat a long time after it leaked a lot of coolant out. Maybe the water pump was dry. Also my old water pump fins have wear on them, to the point it is sharp. I cut my hand on it the other day and noticed it.
I really wouldn't consider this a big job. I took my time working on it because I could. A big job would be doing injectors. Which I hope I don't have to do for a few years.
mossman381 I still can't get torque to display my rates, but it displays dutycycle of all 8 . So no clues yet if I need injectors to sort the winter start issue
Veikra That is odd. I know I had problems seeing mine the first time. But it works now. Did you get the torque pro? I don't remember if you said you did or not.
The rear thermostat needs the hole at the back because the thing is offset. You cant put that thermostat the other way or it will hit a curve in the casting below it
It's the reason, believe me :) Also, if you remove the ac compressor and flip it to the other side you have lots more room to remove the whole top of the housing and the tube
You are going to have to wait for the video but I have driven it and it feels so much better than the s10. The power is awesome and the steering feels like a new truck.
Hey mossman once you're through with the new WP install and you put the harmonic balancer back on how do you tighten the fan back on to spec without the tool "required" to take it off in the first place. Hammer and chisel to remove..how do you get it back on and tight?
Thats some really deep pitting in the pump casting. I thought GM Dex-Cool anti-freeze coolants have oils in them to prevent corrosion? Tig welding is always the way to go with strengthening parts.
I guess it was not corrosion caused by a chemical reaction but it was cavitation that caused the damage. Which makes sense. If you look up cavitation they explain what happens. Very interesting stuff. I saw the rust on the water pump and just assumed that is what happened. Still it is damage and the housing should be replaced imo.
THANKS FOR THE INFO how long did this take from start to finish and also i notice you took of the skid plate is that really necesary as i dont have the luxury of working inside or a lift so hard agregate and floor jacks thanks for you reply
LAWN PRO I don't remember if you had to take the skid plate off or not but it's only 4 bolts and you have to get under it to put in the flywheel lock tool anyway. I wouldn't do this job without it. If you haven't seen I have a video of the water pump removal.
Have a coolant leak at the oil filter housing area. Looks like it's where the other end of the outlet pipe tube which travels to a housing behind the oil filter housing. Nobody seems to replace the seal at the other end of this tube. Have you had any issues or know of this leak?
I have not had any leaks from that location. I have gone away from the diesels. The gas motors are so much more simple. If you don't tow everyday they work great.
YES watched both great job on getting the camera into those hard spots i know its difficult to video and work at the same time i was going to also ask did you use any permatex on any of the gaskets as i did purchase both the metal and fiber type gaskets and i have put on several water pumps but all on chevy motors and never used a metal gasket without sealant does not seam it would sealwith just a metal gasket.
LAWN PRO I showed everything I did. With O-rings you don't need silicone. The metal gasket has sealed just fine without anything. Yes on a gas v8 engine you use silicone on the water pump to engine seal. One more thing I did that I guess I didn't show was I use anti-seize where ever a steel bolt goes into aluminum.
JUST CURIOUS did you use and permatex on the gaskets it appeared that u used Victor Reinz gasket which the ones i purchased are metal and i have not been able to see if the one u used u had used anyking of sealant or just metal to metal the Victor Reinz gaskets i purchased are metal and the felpro ones are more of a material like regular gasket material but the one in your video appeared to be like the Victor Reinz not the felpro would be great help if you could answer that question as i do not want to put it all together to find i need to use sealer or if should just go with the felpro gaskets
watched both removal and install vids. was considering dropping off at the shop. Not nearly as bad as injectors which i did. Thanks for the walk through.
I have done a few of these now and it's really not that bad. The hardest thing is the balancer bolt. That thing is torqued good. And then you need a big torque wrench to reinstall it.
How long did it take you to replace the water pump and are you a mechanic or do you just fix your own stuff? just trying to somewhat figure how long itll take me and my dad to do it on my 03. thanks for the help
Cody Smith I am not a mechanic. We do most of our own repairs on everything from our equipment to our semi trucks. After I did this one I did my dads 04. I believe I did mine in a week but was in no rush to get it done. I did dads in 2-3 days but the second one is always easier. I did a video on dads also but didn't go into as much detail.
If you are talking about the crank bolt that you torque to 74 ft lbs then another 105 degrees. That is ridiculous. I think GM is always looking for a way to screw the diy guy. How do you accurately measure 105 degrees? I know they could have given a torque number. I had to use my dads torque wrench that we use to torque our semi wheels.
Things that might help with a project like this:
Duramax Water Pump: amzn.to/2Cc9hy2
Water Pump Housing: amzn.to/2SHcJYy
Flywheel Lock Tool Kit: amzn.to/2M5oqGc
This video contains affiliate links, which means that if you click on one of the product links and buy, I'll receive a small commission.
ok, here's the easy way to get the balance bolt off......get a short 36mm 12-point socket and a harbor freight earthquake xt stubby 1/2" impact.....fits in perfectly between radiator and bolt...
that's what i use at my shop,,,,no need for flywheel holding tools, etc.
Doing my water pump today. I got as far as the balancer bolt. My 1/2" breaker broke. Waiting till Monday to get 3/4" breaker. Thanks for all the information you gathered to make this video. I've got all my torque specs thanks to you! I'm also recording my experience with this pump. I will be sure to mention you in my video. I know myself how time consuming the whole recording process can get. Your effort is much appreciated!
+MudRFunR You might want to pick up some Wheaties when you get that 3/4. That bolt is torqued on. Glad to help.
Thanks for the video. I can't say it was easy, but your video helped me through it. I just completed a water pump, both thermostats, and a fuel pressure regulator. Took about 2 good days working through it. Saved myself around $1500 from the estimate I got. Thanks again.
+Adam Sutterffield Glad to help.
The pitting on the pumps is not corrosion, it's cavitation. Mine had that, Reused it without problems. The welded waterpump is what I went with as well
Just looked it up and it makes sense. I guess I saw the rust on the water pump and figured that is what happened. It is still damage to the housing and should be replaced. For $77 it is not worth taking the chance.
yeah, no ideas why you have rust in there, are you running straight water in it? Reused mine, didnt see it before ordering and it's not like it'll hurt the cooling capacity or like it would break and explose.
I don't really know how the rust got there. I use 50/50 dexcool/water. I know our water will cause rust stains so maybe that is what happened. With most of the coolant out of the truck I went with distilled water and dexcool this time.
never never never use straight water. Always use distilled or demineralized/deionized
Veikra
Now that I think about it the truck sat a long time after it leaked a lot of coolant out. Maybe the water pump was dry. Also my old water pump fins have wear on them, to the point it is sharp. I cut my hand on it the other day and noticed it.
Thank you. If nothing else , you hooked me up with merchant automotive ! 2 Thumbs up
Big job! Nice work!
I really wouldn't consider this a big job. I took my time working on it because I could. A big job would be doing injectors. Which I hope I don't have to do for a few years.
mossman381
I still can't get torque to display my rates, but it displays dutycycle of all 8 . So no clues yet if I need injectors to sort the winter start issue
Veikra
That is odd. I know I had problems seeing mine the first time. But it works now. Did you get the torque pro? I don't remember if you said you did or not.
yeah, bought torque pro. Havent tried in a while, might retry tomorrow
Your the best Mossman thank you!
Did you have any issues with the welded unit
No
Mossman can you please make a video on changing the glow plugs for an LB7, Much appreciated sir thank you.
The rear thermostat needs the hole at the back because the thing is offset. You cant put that thermostat the other way or it will hit a curve in the casting below it
I couldn't get the cover up high enough to see but that makes sense.
It's the reason, believe me :) Also, if you remove the ac compressor and flip it to the other side you have lots more room to remove the whole top of the housing and the tube
That was 4 more bolts I didn't want to take out. Being lazy I guess :)
sometimes lazy takes more time :p
I know how that goes.
Can't wait to hear it come to life again it's been awhile!
You are going to have to wait for the video but I have driven it and it feels so much better than the s10. The power is awesome and the steering feels like a new truck.
excellent video, very helpful thanks... I'm thinking in replacing the water pump on my dually...
Glad to help.
Hey mossman once you're through with the new WP install and you put the harmonic balancer back on how do you tighten the fan back on to spec without the tool "required" to take it off in the first place. Hammer and chisel to remove..how do you get it back on and tight?
I have always just tightened it once the belt is on the best I can. I believe the way it turns it tightens itself anyway.
@@mossman381 thanks for the quick reply. Take care mossman!
Change your crank sensor while you’re there
Very helpful video thank you!
Glad to help.
Thats some really deep pitting in the pump casting. I thought GM Dex-Cool anti-freeze coolants have oils in them to prevent corrosion? Tig welding is always the way to go with strengthening parts.
I guess it was not corrosion caused by a chemical reaction but it was cavitation that caused the damage. Which makes sense. If you look up cavitation they explain what happens. Very interesting stuff. I saw the rust on the water pump and just assumed that is what happened. Still it is damage and the housing should be replaced imo.
the reason i ask again i ordered the top gaskets and they are metal too the one for the thermastates
LAWN PRO The thermostats have a rubber seal around them. There is no gasket on the thermostat housing.
THANKS FOR THE INFO how long did this take from start to finish and also i notice you took of the skid plate is that really necesary as i dont have the luxury of working inside or a lift so hard agregate and floor jacks thanks for you reply
LAWN PRO I don't remember if you had to take the skid plate off or not but it's only 4 bolts and you have to get under it to put in the flywheel lock tool anyway. I wouldn't do this job without it. If you haven't seen I have a video of the water pump removal.
Have a coolant leak at the oil filter housing area. Looks like it's where the other end of the outlet pipe tube which travels to a housing behind the oil filter housing. Nobody seems to replace the seal at the other end of this tube. Have you had any issues or know of this leak?
I have not had any leaks from that location. I have gone away from the diesels. The gas motors are so much more simple. If you don't tow everyday they work great.
YES watched both great job on getting the camera into those hard spots i know its difficult to video and work at the same time i was going to also ask did you use any permatex on any of the gaskets as i did purchase both the metal and fiber type gaskets and i have put on several water pumps but all on chevy motors and never used a metal gasket without sealant does not seam it would sealwith just a metal gasket.
LAWN PRO I showed everything I did. With O-rings you don't need silicone. The metal gasket has sealed just fine without anything. Yes on a gas v8 engine you use silicone on the water pump to engine seal. One more thing I did that I guess I didn't show was I use anti-seize where ever a steel bolt goes into aluminum.
JUST CURIOUS did you use and permatex on the gaskets it appeared that u used Victor Reinz gasket which the ones i purchased are metal and i have not been able to see if the one u used u had used anyking of sealant or just metal to metal the Victor Reinz gaskets i purchased are metal and the felpro ones are more of a material like regular gasket material but the one in your video appeared to be like the Victor Reinz not the felpro would be great help if you could answer that question as i do not want to put it all together to find i need to use sealer or if should just go with the felpro gaskets
LAWN PRO I didn't use sealant on the metal gasket. I would use the metal gasket. Sounds like Felpro cheaped out on that gasket.
watched both removal and install vids. was considering dropping off at the shop. Not nearly as bad as injectors which i did. Thanks for the walk through.
I have done a few of these now and it's really not that bad. The hardest thing is the balancer bolt. That thing is torqued good. And then you need a big torque wrench to reinstall it.
How long did it take you to replace the water pump and are you a mechanic or do you just fix your own stuff? just trying to somewhat figure how long itll take me and my dad to do it on my 03. thanks for the help
Cody Smith I am not a mechanic. We do most of our own repairs on everything from our equipment to our semi trucks. After I did this one I did my dads 04. I believe I did mine in a week but was in no rush to get it done. I did dads in 2-3 days but the second one is always easier. I did a video on dads also but didn't go into as much detail.
thats cavitaion on the housing, i've seen ALOT worse then that working in a gm dealership
Kevin Rogers Yeah, I found that out later it was cavitation not corrosion.
it's call a tork to yield bolt
If you are talking about the crank bolt that you torque to 74 ft lbs then another 105 degrees. That is ridiculous. I think GM is always looking for a way to screw the diy guy. How do you accurately measure 105 degrees? I know they could have given a torque number. I had to use my dads torque wrench that we use to torque our semi wheels.