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Thread: Rear. Main. Seal.

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  1. #1
    Member
    Join Date
    Jun 2017
    Location
    toronto
    Posts
    130

    Rear. Main. Seal.

    1988 stock 5.0L
    Always dripped down the back, from the bottom of the bellhousing. Replaced the rear main a few years ago, started leaking right after putting everything back together. ZR and Zippy replaced the intake gaskets last year, also got a new PCV valve, screen and grommet. Valve covers are dry too. I've double checked the oil pan gasket and it seems dry also.

    Talked about this in a thread last year and loved RedSN's comment about how even Ford considers a rear main leak as 'normal'
    http://www.torontomustangclub.ca/for...-Intake-Gasket

    I'm ready to do it again and want all the insurance I can get to eliminate this leak. From my research this is what I've come up with:

    - fel-pro crank repair sleeve 16250 (didn't know about these last time)
    - green loctite between this and the crank
    - fel-pro seal 40620 (or similar: Ford Racing M-6701-B302)
    - fel-pro installation tool 16300
    - grease (dialectric?) on inside of seal spring/groove
    - RTV (of some kind) on outside of seal

    Anything you think I could be missing?
    Last edited by m_owing; 09-29-2021 at 09:23 AM.

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