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Rear main seal blew again!!!

 
Old 01-10-2017, 06:43 PM
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W211 E63
Rear main seal blew again!!!

ok so had rear main seal replaced along with pcv valve, intake manifold gaskets, valve cover gaskets. And it just blew again. Any ideas what's going on???
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Old 01-10-2017, 07:23 PM
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How long ago was it replaced?
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Old 01-10-2017, 07:36 PM
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Originally Posted by Ls1toAMG View Post
How long ago was it replaced?
It was replaced and blew again when I drove off from the shop
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Old 01-10-2017, 07:48 PM
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Then it wasn't installed correctly. Take it back to the shop or get a refund.
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Old 01-10-2017, 08:00 PM
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Originally Posted by Ls1toAMG View Post
Then it wasn't installed correctly. Take it back to the shop or get a refund.
thanks yea most likely going to go get a refund
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Old 01-11-2017, 12:56 AM
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E55 and several 928s
Or, you have a crank case pressure issue.
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Old 01-11-2017, 01:32 AM
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Sorry thought we were talking E55. Yeah get a refund and go to the dealer for the repair.

Last edited by Rocman8; 01-11-2017 at 01:34 AM.
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Old 01-11-2017, 03:41 AM
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And do 't let them just pay you for the part.

It's the labor that's a mountain of money.

The seal itself is peanuts.
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Old 01-11-2017, 08:40 AM
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2005 E320 CDI
Before going into the mechanic with guns blazing, consider the possibility of a defective part. Certainly consider the possibility of other issues causing the blown seal, but if they're willing to make it right then why not let them?
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Old 01-12-2017, 07:04 AM
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I'm thinking it's what BC928 said because this is a reputable shop
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Old 01-12-2017, 08:50 AM
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Did you drive away before the sealer dried? There is a whole metal plate that gets glued and bolted.
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Old 01-12-2017, 10:26 AM
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If there was excess crankcase pressure then it would most likely vent out of the oil dipstick tube and not blow the rear main seal out. Sounds like it was an incorrect part that was used and/or it was damaged when it was pressed into the block. Impossible to blow out a new seal that was the correct part and installed properly.
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Old 01-12-2017, 05:52 PM
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Probably just slapped on a new main seal into the old metal plate. If you do rear main seal you need to change the plate, new seal and let the sealant cure over night, or it can leak.
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Old 01-12-2017, 05:54 PM
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Originally Posted by Max.H View Post
Probably just slapped on a new main seal into the old metal plate. If you do rear main seal you need to change the plate, new seal and let the sealant cure over night, or it can leak.
​​​​​​M156 doesn't have a plate. Just a seal pressed into the crankcase.
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Old 01-12-2017, 07:45 PM
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Never get used to the 63's popping up.
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