When replacing the water pump and you want to replace the harmonic balancer (torsional vibration damper) with a Socal or ATI do you replace the seal...?
The truck has 75,000 miles and has a mild EFI 90HP tune, I'm sure a lot you guys are sensitive to vibration and the Duramax engine has an ever so slight vibration right at about 1800 to 2000 RPM that I have noticed since 2013. I have read a number of post' where an ATI/Socal damper smooths out a stock engine...What about adding pins using EDP's? crank pin installer.?
Concerning the seal, it looks like the seal driver J-44645 is to be used with the front cover off or is there one that can be used while the cover is on the engine.?
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Man I feel your dilemma with only having 75K on the clock but my mind tells me that when I've got something tore down that far its always good to replace a cheap expendable part just for safe guard. Do you NEED to change it...no...but you'll kick yourself in the ass if it starts leaking in 20K and could have replaced it easily when you had the chance.
I have seen the cheap water pumps make a very odd noise so be careful of what you go back with I have had good luck with AC Delco and GM pumps. With only 75k on the front seal and not have the correct tools to pull it and install it i would not mess with it at all The front and rear seals on a duramax seem to be pretty tough and go the distance.
I don't know about rear main seals being tough. I've seen my fair share of rear main seals seeping oil. My 13 lml is included.
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I have seen the cheap water pumps make a very odd noise so be careful of what you go back with I have had good luck with AC Delco and GM pumps. With only 75k on the front seal and not have the correct tools to pull it and install it i would not mess with it at all The front and rear seals on a duramax seem to be pretty tough and go the distance.
Pinned pump, if the seal aint leakin, don't replace it. ive done a lot of water pump jobs and never replaced the front main, with 4x the mileage. I wouldn't go with a fluid damper as its heavier than stock and we already have crank issues, but that is another topic.
I agree on going with a pinned water pump. Nice bit of insurance.
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