How do I? Oil seal
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How do I? Oil seal
- Thread starter Smulli440
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- leak oil replacement seal
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- Pittsboro, NC
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- 1981 CJ5/258 4.2L I6, Tremec T-176 4-speed, Dana 300, Power Steering, Howell Throttle Body Injection System, Warn Locking Hubs, Warn Rock Crawler front/rear bumper with Tire Swing Carrier, Full Roll Cage, Pro Comp ES9000 shocks
You sure it's not a leaking valve cover gasket or breather? A loose breather, can cause serious leaks. I was leaving a puddle of oil everywhere I went, until I replaced mine. Better to start with something easy, then replace a rear main seal, and find out it wasn't the problem.
TSB8C
Old Time Jeeper
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- Cut-n-Shoot, TX
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- 1984 CJ7, 420 HP "ZZ6 EFI" Crate engine, 700R4, D300, Dana30 front, Dana489 rear, 4.56 gears, 4" lift
Yes, the rear main seal can be replaced without removing the engine or the crank shaft. The seal is a 2-piece. Don't use anything metal to push and prod the upper half into place. Use plastic or wooden tools to avoid scratching surfaces.
Check out this video
Check out this video
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- New Orleans area
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- 84 CJ7 4 banger-owned since new in 1984 bought off truck at dealership - rebuilding 258, T176 with Sniper EFI D300 4:1 Lomax gears Twin Sticked 1 piece axels with locker
My buddy and I did it on Jeep 4.0L. Do like TSB8C said and also check for correct location like jzak said.
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- 1986 CJ7 Laredo:
258 w/Howell TBI, HEI Ign., Dana 44 Front w/Detroit, Dana 44 Rear w/Discs & Detroit,
NP435 Trans, Dana 300 T-case w/twin stick
1969 Bronco:
351W, D44 high pinon front from full size, 9” full size rear, NP435 trans and Dana 20
I did the rear main seal in my AMC 258 i6 / 4.2l this winter. Worst part was scraping/cleaning the old oil pan gasket off. Nasty razor blade work with crud falling in your face for a couple hours.
While you’re down there and it’s apart, good time to replace the oil pump too and give the oil pan a good scrubbing inside and out.
Try to use the blue Felpro gasket on the pan.
Like TSB8C stated, careful fishing that upper half of the seal into the groove. There are sharp edges around the groove holes where the bearing cap seats on the machined surface of the block. These edges can cut up the seal when you’re fishing it in. A little lube with oil helps.
While you’re down there and it’s apart, good time to replace the oil pump too and give the oil pan a good scrubbing inside and out.
Try to use the blue Felpro gasket on the pan.
Like TSB8C stated, careful fishing that upper half of the seal into the groove. There are sharp edges around the groove holes where the bearing cap seats on the machined surface of the block. These edges can cut up the seal when you’re fishing it in. A little lube with oil helps.
