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Author Topic: 4L pilot bearing  (Read 6243 times)

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Offline JackstandJohnny

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4L pilot bearing
« on: April 04, 2010, 10:18:22 PM »
in the middle of my engine swap.  now, i'm not sure what engine came out of the YJ, but i'm pretty sure its actually a 91 engine/tranny.  the pilot bushing in there is one of these guys https://www.quadratec.com/products/52008_00.htm

picked one up at Canadian tire today but it just wouldn't go.  am i missing something?   the engine came out of fugs 96 XJ.  am i missing something?  the pilot bearing above fits on the transmission just fine, but i can't hammer it into the crank; its a hair to big.  think it was just defective?  (i also have a pilot bearing for a 96XJ but it doesn't fit.)
any ideas are greatly appreciated.

cheers
~ rescue green JKUR on 35s.  typical rubicon build

Offline Grease Nipple

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Re: 4L pilot bearing
« Reply #1 on: April 05, 2010, 12:27:16 PM »
Even tried putting the pilot bearing in the freezer and heating up the crank. would not go in.




Offline Grease Nipple

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Re: 4L pilot bearing
« Reply #2 on: April 05, 2010, 12:35:04 PM »
I vote for sawsall... just make the hole a little bigger ;)

Maybe some KY?

Offline JackstandJohnny

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Re: 4L pilot bearing
« Reply #3 on: April 05, 2010, 12:40:36 PM »
right about now i'm debating parting it out.
~ rescue green JKUR on 35s.  typical rubicon build

Offline FiEND

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Re: 4L pilot bearing
« Reply #4 on: April 05, 2010, 01:30:49 PM »
where's the old pilot bearing for the engine?  might be able to swap the little inner bearing with the outer casing.   it's pretty much what I had to do.
1Wide2High
ILV2FRT
'97 TJ [sold]
'17 JK Rubicon

Offline frenchy

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Re: 4L pilot bearing
« Reply #5 on: April 05, 2010, 01:33:05 PM »
You hitting it with a hammer? or something like a socket over it to keep it straight?

more info...

The 5-speed manual transmission is the light-duty Peugeot BA10/5 in the '87-'89.5 4.0 XJ, the medium duty Aisin-Warner AX15 in the '89.5-'99 4.0 XJ, and the medium-duty New Venture Gear NVG3550 in the '00-'01 4.0 XJ. When carrying out engine swaps (either another 4.0 or a stroker), selection of the correct pilot bearing can be a headache. The details below will make choosing a pilot bearing simple:

'87-'89.5 BA10/5:

OEM pilot bearing 33004041 for '87-'91 4.0 engine
Advance Adapters pilot bushing 716120 for '92-'04 4.0 engine
*Upgrade transmission to AX15 or NVG3550 for stroker engine swap*

'89.5-'91 AX15:

OEM pilot bearing 33004041 for '87-'91 4.0 engine or stroker
Advance Adapters pilot bushing 716120 for '92-'04 4.0 engine

'92-'99 AX15 and NVG3550:

OEM pilot bearing 53009180AB for '87-'91 engine or stroker
OEM pilot bearing 53009180AB or 53009181 for '92-'04 4.0 engine.
Jeep
With stuff

Offline Sean778

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Re: 4L pilot bearing
« Reply #6 on: April 05, 2010, 01:43:35 PM »
That's funny, I was just about to post this info.  I found it on Greatlakes4x4.com. It sounds like you need A.A. 716120 bushing, unless I'm mistaken. $23.91 on their website.
'89 XJ

Offline JackstandJohnny

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Re: 4L pilot bearing
« Reply #7 on: April 05, 2010, 02:27:31 PM »
~ rescue green JKUR on 35s.  typical rubicon build

Offline hps4evr

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Re: 4L pilot bearing
« Reply #8 on: April 05, 2010, 05:57:33 PM »
now that i see the pic i know what you've got. i had this issues long time ago. i took the pilot bearing to a machine shop and they shaved it down a girls-junk-hair thickness. and it fit fine.
YJ=Y’all Jealous

Offline Gearhead

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Re: 4L pilot bearing
« Reply #9 on: April 05, 2010, 08:54:15 PM »
A couple of years ago I swapped an AX15 from a 98 ?  TJ  into my 88 YJ which happens to have a 258 crank from a 70? something ? CJ and a 93   4.0  block.

A pilot bearing does not exist for the application described above.

What do I do in situations like this ?


I make one , a bushing does the job just fine .

In your  situation , you may be able to buy one , measure the bore in the end of the crank ( if it's still round ) , measure the pilot shaft

Report back with measurements
« Last Edit: April 05, 2010, 09:07:37 PM by Gearhead »

Offline JackstandJohnny

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Re: 4L pilot bearing
« Reply #10 on: April 05, 2010, 09:21:29 PM »
Jeff, Eric

thats the plan......... dropping a bearing off at Jamey's tomorrow to take a hair off. 

thanks all  i'll update when done
~ rescue green JKUR on 35s.  typical rubicon build

Offline Bnine

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Re: 4L pilot bearing
« Reply #11 on: April 06, 2010, 01:29:21 PM »
I didnt read all of it, but the pilot bushing changed in 93-94 john. Get the one specific to your year of crank and you will be good.

Nevermind, i see serge nailed it, and the change was 92-93.


Goodluck
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Offline Sean778

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Re: 4L pilot bearing
« Reply #12 on: April 15, 2010, 02:39:06 PM »
What's the status of your engine swap buddy?  You never did post an update.
'89 XJ

Offline hps4evr

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Re: 4L pilot bearing
« Reply #13 on: April 15, 2010, 06:13:20 PM »
yeah! wtf? did that thermostat housing work out for ya? and wheres my new to me housing??? lol!
YJ=Y’all Jealous

Offline Immortal

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Re: 4L pilot bearing
« Reply #14 on: April 15, 2010, 09:21:35 PM »
Stat housing worked out fine... Tiny is in Cuba for the week.... smoking a big, long, dark......

































cigar. You sick bastards.
if we were smart with our money we wouldn't own Jeeps.
Here's your cup of STFU... ENJOY!