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M38A1 Rear Main Seal Replacement

Tracer

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I'm still learning my way around the M38A1. My Jeep is running great, but she has a rear main seal leak. Guys, can I replace the rear main seal with the engine in the Jeep, or do I have to pull the engine??..............thanks!!
 
Last edited:

DeetFreek

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Either way, I've done both. Easier out, but way quicker in. Getting the top seal in is of course tricky because of the crank being in the way, but there's a few tricks to make it simpler.

Drain the oil, pull the pan, pull main cap and replace the seal.
 

Tracer

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Thanks Deet!! I'd like to get started on this next week. I did the rear main seal in my CJ7 with a 304 V8, but this little 4 cylinder is a bit different.
 

DeetFreek

Well-known member
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346
63
Location
New Sharon IA
Thanks Deet!! I'd like to get started on this next week. I did the rear main seal in my CJ7 with a 304 V8, but this little 4 cylinder is a bit different.
You're welcome! It's so weird since the pan is so accessible, no crossmember in the way! The pickup really doesn't even really give you a headache.
 
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