I got the old one out, and now I am to replacing the new one... I just am not sure how to press it in there... any ideas?
I am referring to the water pump impeller shaft gear that sits above the cam gear on the timing set and is run by the timing set...


thanks again!

 

are you doing an extreme duty chain? If so when i did mine i didn't replace my water pump gear it the stocker was fine.

 

I replaced it w/ the stock LT1 replacement from GM and this is the thread where I explained why I need to....
http://web.camaross.com/forums/showt...4&page=2&pp=15
and here are the 3 pic's of my stock one that had 75k miles on it... I would suggest replacing it in hindsight now when you replace your timing set... but this is why...
http://dave89iroc.michiganspeed.com/32978826885.jpg
http://dave89iroc.michiganspeed.com/...3909_468_1.jpg
http://dave89iroc.michiganspeed.com/...4037_468_1.jpg

the teeth on the stock LT1 timing set are perfect... not even a touched edge.. but the water pump teeth however....
thanks for any advice on how to put a new one in there... I popped the stock one out using a 3/8" extension and a hammer and it popped out w/ 1 semihard hit.

thanks again

 

I would agree that the gear should be replaced. I gave up trying to replace the gear on that shaft assemby. Most shop manuals for the LT1 state that the assembly is a wear item. I purchased a completely new assemby with the gear on it. It wasn' t that expensive and I didn't want to lose a day or more having the engine apart as I tried to find a machine shop to press fit it on.

Maybe there is an easy way to get it on but I didn't figure it out.

 

yah, I have a replacement gear set... w/ the impeller shaft and all ready. I just now need to find a way to get it far in enough so I can use the torx bolts to push it the rest of the way in... I don't want to use a hammer on the shaft but if I have to that might be my only option... any suggestions?

 

put a piece of wood over the shaft and hit the board with a hammer.