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Ford Focus Service Manual: Valve Guide Inner Diameter

Ford Focus Service Manual / Powertrain / Engine / Valvetrain / Valve Guide Inner Diameter


Refer to the appropriate Section 303-01 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.

  1. Measure the ball gauge with a micrometer.

  1. If the valve guide is not within specifications, install a new cylinder head assembly.

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