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Repair main seal oil leak

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My 1995 STS (163,000) has been leaking oil from

the main seal for awhile. Opted to drive it

but leak has got much worse so need to look at

getting it repaired.

I was wondering what kind of a charge I will

be looking at to get this done.If anyone

has had this repair can you give me a

ball park figure.

Thank you,


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Rear main seal leaks are rare. Are you sure it is not the oil manifold plate that is between the oil pan and the engine block that is leaking?

At any rate, the engine needs to come out or the trans needs to come out to access the oil manifold plate and rear main seal. $2500+ comes to mind.

'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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