Devon Rangel

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???

Ls1toAMG

How long ago was it replaced?

Devon Rangel

It was replaced and blew again when I drove off from the shop

Ls1toAMG

Then it wasn't installed correctly. Take it back to the shop or get a refund.

Devon Rangel

thanks yea most likely going to go get a refund

BC928

Or, you have a crank case pressure issue.

Rocman8

Sorry thought we were talking E55. Yeah get a refund and go to the dealer for the repair.

MacVidMB-V8

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.

rapidoxidation

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?

Devon Rangel

I'm thinking it's what BC928 said because this is a reputable shop

StarvingArtist

Did you drive away before the sealer dried? There is a whole metal plate that gets glued and bolted.

M3diesel

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.

Max.H

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.

Rocman8

​​​​​​M156 doesn't have a plate. Just a seal pressed into the crankcase.

StarvingArtist

Never get used to the 63's popping up.