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Thread: Fresh rebuilt AMC304, first start up and oil psi is too high

  1. #11
    Thank you from BT ULTIMUS MAXIMUS STATUS tufcj's Avatar
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    Apr 2004
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    Watkins, CO
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    2,864
    AMC V-8 heads are known to crack at the lower front and rear corners if not torqued correctly. There's a sharp point in the casting. Between cylinders has to be a gasket problem. I doubt a few heat cycles will do anything. It might take a re-torque of the head bolts to proper torque in the proper sequence. If that doesn't fix it, you'd have to remove the head to find the failure. I've had good results with the AC-Delco stop leak tablets, but I only use them as a last resort.

    Bob
    tufcj
    1969 AMX
    1967 Rambler Rogue

    If you need a tool and don't buy it...
    you'll eventually pay for it...
    and not have it.
    Henry Ford

  2. #12
    Thank you from BT ULTIMUS MAXIMUS STATUS tufcj's Avatar
    Join Date
    Apr 2004
    Location
    Watkins, CO
    Posts
    2,864
    AMC V-8 heads are known to crack at the lower front and rear corners if not torqued correctly. There's a sharp point in the casting. Between cylinders has to be a gasket problem. I doubt a few heat cycles will do anything. It might take a re-torque of the head bolts to proper torque in the proper sequence. If that doesn't fix it, you'd have to remove the head to find the failure. I've had good results with the AC-Delco stop leak tablets, but I only use them as a last resort.

    Bob
    tufcj
    1969 AMX
    1967 Rambler Rogue

    If you need a tool and don't buy it...
    you'll eventually pay for it...
    and not have it.
    Henry Ford

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