New clutch assembly

[Chipw]

Replacing the clutch in my 1980 CJ7 . The new assembly came with a new pilot bearing but there seems to be an adapter/sleeve type thing around the bearing.

The guy helping me says we should replace that piece to while we are doing it. Only problem is I don't know where to get one.

I'm talking about the outer piece around the brass one in the picture below. Any idea what that's called and where I can order one?



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[hagar]

Rear main seal ?
It's a full circle seal that goes around the crankshaft.
Only way to service that seal on that engine is where you are right now.

 

[Chipw]

Rear main seal ?
It's a full circle seal that goes around the crankshaft.
Only way to service that seal on that engine is where you are right now.

the part we need is the silver part around the brass pilot bearing but right inside the holes where the flywheel attaches. Any idea what that's called? My buddy knew but I forgot what he called it. He just said "try to find one"
thanks

 

[gert]

the part we need is the silver part around the brass pilot bearing but right inside the holes where the flywheel attaches. Any idea what that's called? My buddy knew but I forgot what he called it. He just said "try to find one"
thanks

"crank insert" according to this website Crank Insert / Pilot Bushing info for 2.5L 4cyl - Pennock's Fiero Forum

 

[mstar]

You have some great helpers here on the forum. I would replace the rear main seal as a maintenance item as was suggested .
I too have never seen a adaptor /locator sleeve like that. With that being said I would be inclined to leave it alone IF it is tight and not worn and you can remove pilot bushing without disturbing that sleeve.The sleeve is a press fit and to remove and press new one in may require removing crank or making a jig to put it in using the flywheel bolt holes.
The other thing is the pilot shaft bushing.Is it worn ? If you can determine that it is indeed in good condition I would leave the whole works as is.
I did read the link that gert gave . Very interesting .Its like they forgot to put a locator shoulder on the crank flange. my 2 cents. mike

 

[gert]

You have some great helpers here on the forum. I would replace the rear main seal as a maintenance item as was suggested .
I too have never seen a adaptor /locator sleeve like that. With that being said I would be inclined to leave it alone IF it is tight and not worn and you can remove pilot bushing without disturbing that sleeve.The sleeve is a press fit and to remove and press new one in may require removing crank or making a jig to put it in using the flywheel bolt holes.
The other thing is the pilot shaft bushing.Is it worn ? If you can determine that it is indeed in good condition I would leave the whole works as is.
I did read the link that gert gave . Very interesting .Its like they forgot to put a locator shoulder on the crank flange. my 2 cents. mike

First time I have ever heard of something like this, usually its part of the crankshaft not separate from it

 

[Chipw]

Thanks Gert for that link and thanks everyone else for the comments.
I have very little experience with engines or vehicles in general, this is a learning experience for me. My friend however has a lot of experience and is a professional mechanic, like said above he had never seen a sleeve/adapter like that. "Bad design" was his comment.

I believe I can locate what I need from the information given. Thanks a bunch guys.

Oh, I'm replacing the whole motor with a rebuilt one from jasper motors so no need to replace the rear main seal.

Again, I really appreciate the help




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[Chipw]

Ok guys thanks for the help. With the link to the fiero website I was able to track down the parts I needed to replace my pilot bushing.

The original " crank insert" that went into the 80-81 4cyl. Jeeps is next to impossible to find. I was told by a very knowledgeable jeeper my best bet was to try and pull out the original one from my motor. No deal as it got to buggered up.

I was able to get the pilot bushing sold at the fiero store linked to above. The outside diameter fits through the flywheel and into the crankshaft perfect. Problem is the inside diameter is to large to adequately support the input shaft from the Transmission .
I had to bore out the fiero bushing and press the brass bushing that is listed in the manual into the fiero one.

It turned out to look a lot like what was in the back of my original motor. It isn't exact to a picture I found of a stock one but close. That lead me to believe one of my PO's did this exact same thing. I'll get part numbers for the bearings used and add to this post tomorrow in case anybody else with an 80-81 4 banger runs into this problem

What was in my old motor

The two bearings bored and pressed together

Picture of stock bearing and crank insert from stock CJ7 with gm 2.5. You can see the brass bearing sits more flush than the one from my jeep and the one I had made.



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[hagar]

Just for reference, the Jeep part number for crankshaft insert is: J8132262.

 

[Chipw]

Just for reference, the Jeep part number for crankshaft insert is: J8132262.

Cool. Thanks.


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[gert]

Wow that's a shame that's it's not availble


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[Chipw]

Original jeep crank shaft insert : J8132262
(You'll likely still need a pilot bushing but it's possible it came as one unit)

If you can't find that and need to fabricate your own to remate the GM 2.5 motor to the SR4 Transmission :
Outer bushing/crankshaft insert : gm part# 10018699

Inner bushing: PB-7501295

You'll have to bore out the GM crankshaft insert and press in the inner bushing.
The GM part is also hard to find but I ordered mine from the Fiero store.
Hope that helps the next guy some


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