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Thread: M70 rear main seal and cover gasket

  1. #1
    Join Date
    Dec 2011
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    CSRA, SC
    Posts
    923
    My Cars
    850Ci, Excursion

    M70 rear main seal and cover gasket

    Guys, I have the clutch off my car to replace the pilot bearing and rear main seal "while I'm in there." I bought the paper gasket that goes behind the main seal cover plate. That cover plate also seals against the rear edge of the oil pan. I replaced the oil pan gasket about 2+ years ago and I remember the ancient gasket tearing apart when I removed it. If I pop off the cover plate do I run the risk of ruining the pan gasket?

  2. #2
    Join Date
    Dec 2011
    Location
    CSRA, SC
    Posts
    923
    My Cars
    850Ci, Excursion
    Only tangentially related question, are the flywheel bolts really 1 time use?

  3. #3
    Join Date
    Nov 2016
    Location
    Charlotte, NC
    Posts
    2,108
    My Cars
    '02 540i-6, '97 540i-6
    Just did it on my 540. The Bentley manual said to put Drei Bond on that section of the pan gasket. (A sealant made for use with the oil pan gasket there.)

  4. #4
    Join Date
    Sep 2008
    Location
    Santa Barbara
    Posts
    3,642
    My Cars
    91 Dinan860 & 91 850 6sp
    2yr old upper pan gasket? Probably will stay intact (unless you glued it). If it does tear, you can trim flush to the block with a razor and use a new back piece from another pan gasket with Rheinzolsil in the corners.

    The flywheel bolts can be resued with new blue loctite applied.

  5. #5
    Join Date
    Dec 2011
    Location
    CSRA, SC
    Posts
    923
    My Cars
    850Ci, Excursion
    Ok that is what I was hoping. I didn't do anything special on install so it might be a clean job.

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