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General Procedure

NOTE: Refer to General Specifications in the appropriate engine service information for the specification.
  1. NOTE: Valve guides tend to wear in an hourglass pattern. The ball gauge can be inserted into the combustion chamber side of the valve guide, if necessary.

    Use a ball gauge to determine the inside diameter of the valve guides in 2 directions at the top, middle and bottom of the valve guide.

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  2. Measure the ball gauge with a micrometer.
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  3. If the valve guide is not within specifications, install a new cylinder head assembly.
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