Rear main seal gone wrong!
04-30-2021, 11:46 AM
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Location: Sault Ste. Marie, Ontario
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Year: 1996
Model: Cherokee
Engine: 4.0L Straight 6
Hey everyone, just wanted to update.
So far it's been about 2000 miles since I changed the rear main bearing and she's running like a top. Oil pressure is 50psi on start, usually 40psi at an idle after warmed, and roughly 30psi on a hot day after a lot of driving. I changed the oil and filter after 500 miles with the new bearing in. I use Rotella T6 5w40 with half a bottle of Marvel Mystery Oil every change since this engine sat for almost 2 years before I got it. I'll probably stop using the MMO after a couple more changes since the diesel oil has a fair amount of detergents in it inherently.
So far it's been about 2000 miles since I changed the rear main bearing and she's running like a top. Oil pressure is 50psi on start, usually 40psi at an idle after warmed, and roughly 30psi on a hot day after a lot of driving. I changed the oil and filter after 500 miles with the new bearing in. I use Rotella T6 5w40 with half a bottle of Marvel Mystery Oil every change since this engine sat for almost 2 years before I got it. I'll probably stop using the MMO after a couple more changes since the diesel oil has a fair amount of detergents in it inherently.
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