F-head 134 rear main seal - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-09-2002, 08:06 AM
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F-head 134 rear main seal


I am new to this board. I have a recently purchased a 65 CJ-5 with the 134 4cyl. Its my first Jeep and should make a good project. I already need some help in returning this vehicle to service.

I tried using the search function to answer my question as mentioned in the guidelines post but I was unsuccessful.

Last night I tried to replace the rear main seal oil seal in my Jeep. The only problem I encountered was inserting the top half of the seal around the crankshaft. I tried for a while and got it started only to bend it ruining the seal. I tried lubing the seal with grease but it didn't seem to help much. Is there any special trick to getting the seal in? Any tips or tricks would be greatly appreciated.

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post #2 of (permalink) Old 12-09-2002, 01:59 PM
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Re: Flathead 134 rear main seal

Diid you loosen the mains up first? By the way you probably don,t have a flat head but a F head.
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post #3 of (permalink) Old 12-09-2002, 02:22 PM
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Re: Flathead 134 rear main seal

1. Welcome to the forum.
2. Thanks for filling out your user profile:
3. You'd better be:
a. Big, and
b. You're last name better be Johnson
4. Back off ALL the crankshaft bearing block bolts.
5. This drops the crankshaft down.
6. There is more room to install the top half of the seal.
7. Once installed torque the bearing block bolts back to spec.
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post #4 of (permalink) Old 12-09-2002, 10:01 PM
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Re: Flathead 134 rear main seal

Thanks for the Heads-up....sorry...lame attempt at humor there. Kinda goofed up my title, thanks for clearing that up.
post #5 of (permalink) Old 12-09-2002, 10:08 PM
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Re: Flathead 134 rear main seal

If it makes you feel better I'm 6'0" and 280...I think that clears up the Big part, and yes Johnson is my last name. It's a nickname I picked up in high school [img]images/graemlins/wink.gif[/img]
So just loosen all the caps to make room for the seal. I will try that tommorow when the new seal comes in. Thanks for the help, this should have me up and running in no time.
post #6 of (permalink) Old 12-10-2002, 07:49 AM
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Re: Flathead 134 rear main seal

I had to do the same thing this summer (L-Head) when I had the top one in I took a Small piece of filler rod (.040) and ran it around behind it and gave it a little tugg. for some reason when going around the groove it kept riding in the top. it is a very strange seal any way it has two rubber dowels that go up the side of the cap also, terrible design

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