Oil pump drive shaft

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Mopardude

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When I try putting my oil pump drive shaft in it is very tight. I know they are normally pretty snug but this seems way to tight. I am not sure if I can get it all the way down with out having to do some serious hammering on it. Any suggestions on what to do?
 
did you coat both gears with moly lube or white grease???, You should be able to just push down with a flat balde screwdriver while you spin the crank over with a pull handel and it will go right down. It will not go in with out turning the crank at the same time because of the way the gears a made.
 
It is so tight you can't even get it that far down. You shouldn't have to turn the crank at all. normally you can twist these with a screw driver right into place.

Both the bushing and the shaft are brand new. Can one be clearanced a little? Or Can I just hammer it the shaft iin and out a few times to work the bushing in?

*****Please someone Help, This is the only thing stopping my motor from finally being done!********

:thumleft:
 
In the Factory Service Manual it says to burnish a new bushing to the proper size with a burnishing tool (hone). Use a stiff wire brush that looks like a tube cleaner in a drill and check your fit to your oil pump drive often.
After you get it to fit you want to clean out your engine thoughly, your taking some metal out of the bushing and you want all of this stuff out of your motor, if this means tearing it down again then do it. Your motor needs to be clean or your going to kill it fast.
 
Maybe with a special tool. They want you to burnish with it in the block because it changes size when its installed as the block is squeezing it to hold it in place.
 
did the machine shop install the new bushing? If so tear it down and take it back to the shop they will have a burnisher to size it with. just sounds as if someone for got to size it after the installed the bushing. They may have a burnisher like they use on valves guides that you just hammer through.
 
Yes the machinist did install it. Although I think the problem maybe with the shaft. Not wanting to tear my engine back down I took the shaft out of another 360 I have laying around and it fit like it should. Not wanting to scavenge parts from that 360 I took the shaft out of a 318 I have and it fit like it should too. Since I am selling the 318 I would prefer to scavenge that shaft from that engine. My only question is the 2 360 shafts have square corners on the teeth and the 318 shaft has chamfered corners. Can I get away with using the 318 shaft? Or what I may try doing is to take back this one new from Napa that doesn't fit and and see about getting one from my dealer.
 
if this a performance set up I would opt to buy a new shaft they are cheap like $25.00 If you a running a high flow oil pump they recommend a new shaft. Is the bad one new? If so take it back and get an exchange.
 
hey Tim
after reading your build get a new shaft for sure, you have to much money invested to blow it on a oil pump shaft.
 
Yea Chad I was thinkin the same thing today. I called up my dealer and had them order me a new one.
 
I got the new shaft today and she went in there like she was supposed to. I dunno why I bought a part like that from NAPA anyways. If I would have bought it from MP to begin with I would have avoided all this problems.

Except for the intake the motor is done! :thumleft: I just have to finish all the other little projects i have going, like B&M shifter, power steering pump rebuild, than she can go in.
 
Glad you got it figured out.

I wouldn't put anything from NAPA in a place that could let me down.
 
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