What is allowed cylinder head warpage?
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Thread: What is allowed cylinder head warpage?

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    2000 Post Club Site Supporter My location P.J. Romano's Avatar
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    What is allowed cylinder head warpage?

    I am trying to find information regarding allowed cylinder head warpage for CIH engines. Machine shop is telling me that they do not deem necessary to machine the head if the warpage is 3 thou or less.
    Any experience here?
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    Project 1450 supporter... Site Supporter My location RallyBob's Avatar
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    Quote Originally Posted by P.J. Romano View Post
    I am trying to find information regarding allowed cylinder head warpage for CIH engines. Machine shop is telling me that they do not deem necessary to machine the head if the warpage is 3 thou or less.
    Any experience here?
    I've never seen a CIH head warp a whole lot, at least not over the length of the head. But they will 'cup' between cylinders when overheated, and that compromises head gasket seal.
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