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Thread: '77 425 motor question..

  1. #1
    Join Date
    Jun 2005
    Location
    Pennsylvania
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    29

    '77 425 motor question..

    Hi, i have a 77 425 motor and i need a rear main seal installed. my mechanic wants to know if he can get to it without removing the motor. he also wants to know if its a one piece or three piece???? he also wantsto know if he needs to drop the cam....these are all his questions...basically, how tough of a job is it and exactly what is the best way of doing it without removing the block. thanks much.


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  3. #2
    caddydaddy's Avatar
    caddydaddy is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 Escalade 6.0L 2WD, 2007 Jeep Grand Cherokee Limited CRD
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    Gales Ferry, CT
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    Re: '77 425 motor question..

    It's a two piece seal. You can remove it by removing the oil pan and the last main bearing cap. I changed the rear main seal on my 472 last summer. It hasn't leaked since!

  4. #3
    Join Date
    Jun 2005
    Location
    Pennsylvania
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    29

    Re: '77 425 motor question..

    great. thanks, any idea as to the time it takes to do this, say if someone had it up on a lift? thanks for all your help.


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