I am replacing the water pump on my 01 duramax but am having trouble getting nut loose on harmonic balancer, and why in the world did they put one nut to water pump behind balancer?


what is the correct socket size and best way to loosen?


any help would be greatly apreciated


Thanks

I have a 2002 duramax that I just replaced the water pump on. The corrcect socket size is a 36mm 12pt. If you cannot find a 36mm. You might be able to use a 1 7/16" socket.


The bolt is on there pretty tight. You will probably need to get the tool to hold the flywheel. You will also want to use a 3/4" drive socket and breaker bar and 3 or 4 feet of cheater bar.


I tried a 1/2" drive socket, but the adapter decided to do the twist. I ended up using a 3/4" drive 1 7/16" 12 point socket and the bolt came right off.


Good luck.

Thanks isudiesel i tried the 1-7/16 socket with 3/4 drive and a three foot cheater bar also tried impact but was unable to budge. After a day and a half of trying i gave up and put back together. I think i will let the dealer try. Thank for the advise.