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Some mechanics will drop the pan, this includes removing the timing chain and harmonic balancer, then loosen the main, removing #5 then pull out the old and insert the new seal. This can be done with out touching the rod journals. The only problem is the seal is fiber, looks and feels like waxy braded rope. The seal needs to be formed and that can be a problem. When done right it takes a tool the same size as the crank journal 4", to do it right. I have never bought seals that were pre formed or that didn't need to be cut in to the right length to fit and working around the flywheel or flex plate make fitting tough.
I have replaced one rear main seal while the engine was still in the car and it worked for a short time on a '70 350 but it was a miserable job to say the least and I said I would never do it again. When the seal started to go the second time, I pulled the motor and using an engine stand I then pulled the crank and pushed the pistons down out of the way and fitted the seal the right way where I had better control of the quality of work I was doing.
There is a new Viton seal for Pontiac engines. USE IT. It's expensive $35 but worth every penny on a Pontiac.
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∙ 14y ago
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How do you replace a rear main oil seal on a 1996 Pontiac firebird3.8?
That engine has a solid round one piece rear main seal that slides over the rear of the crankshaft. You will either have to remove the engine are transmission to be able to replace the rear seal. No other way to do it. ( BIG JOB ) and a good paying job.
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A Jeep 4.0L has a two piece rear main seal. You have to remove the oil pan and rear main bearing cap to replace it.
When replace rear main seal on 1998 Mercedes C280 the rear main seal retainer need to be replaced too?
dont do it
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You will have to replace the rear main seal. This will require that the transmission be removed.
How much does it cost to replace rear main seal?
350.00
How much does it cost to replace a rear main seal in a GMC Yukon XL?
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How do you change a rear main seal on a 2001 Chevy 2500 HD long bed
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No you can access the rear main seal by removing the Transmission, flywheel etc
Will bars leaks rear main seal fix bad rear main seal leaks?
NO it will not. That is BAD stuff to put in the engine oil. You need to check the PCV Valve and make sure it is working. If it is then you will need to replace the rear main seal.
