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Buick Forum: Motor Mount torque specs
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  1. #1
    weathdl is offline Buick Newbie My Buick(s): 2007 Buick Lucerne - 3.8 V6
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    Motor Mount torque specs

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    Does anyone have documentation showing the correct torque specs for the motor mount nuts on a 3800 III? Specifically the nut for the rubber mount to the engine bracket and the nut for the rubber mount to the engine frame. A search on the internet shows several different values for other buicks and 3800s. Some say 32 ft/lb for the mount/bracket, some say 50 ft/lb for the mount to frame. Then another site showed 58 ft/lb for both.

    The new mount didn't come with any torque instructions. I just don't want to over tighten the rubber.

  2. #2
    polarzak is offline Full Member My Buick(s): Lucerne & Chrysler 300 (Both In Gorgeous Black)
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    Re: Motor Mount torque specs

    From the 2006 Service Manual for my Lucerne with the 3800 III


    Right Engine Mount Bracket Stud 71 lb in
    Right Engine Mount Bracket to Engine 44 lb ft
    Right Engine Mount to Bracket Nut 59 lb ft
    Right Engine Mount to Frame Rail Nuts 52 lb ft

  3. #3
    weathdl is offline Buick Newbie My Buick(s): 2007 Buick Lucerne - 3.8 V6
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    Re: Motor Mount torque specs

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    Quote Originally Posted by polarzak View Post
    From the 2006 Service Manual for my Lucerne with the 3800 III


    Right Engine Mount Bracket Stud 71 lb in
    Right Engine Mount Bracket to Engine 44 lb ft
    Right Engine Mount to Bracket Nut 59 lb ft
    Right Engine Mount to Frame Rail Nuts 52 lb ft
    Thanks so much!

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