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Thread: Aluminum Manifold Torque Specs

  1. #1
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    Default Aluminum Manifold Torque Specs

    Do you know what the torque specs are for the A4 Olds manifold? The CSM says 40 lb., but I'm pretty sure that is for cast iron. I don't see any other specs in the manual. Being aluminum, I don't want to overtorque the manifold.
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  2. #2
    Administrator 88hurstolds's Avatar
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    35lbs is what GM recommends for Aluminum intakes, be sure to also use hardened washers.
    Ebrock states 25lbs for theirs...
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    Great! Thanks!
    '76 Cutlass S 350 (1981-83)
    '79 Cutlass Supreme 260 (1983-85)
    '79 Cutlass Supreme 350 Chevy (1989-1993)
    '77 Cutlass Salon 350 (1996-present)
    '98 Bravada - green - (2005) RIP
    '98 Bravada - black - (2005-2011) sold
    '87 442 (May 2010) undergoing restoration

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