Valve Guide Inner Diameter

NOTE: Refer to the appropriate Engine article 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.

Courtesy of FORD MOTOR COMPANY

Courtesy of FORD MOTOR COMPANY

3.

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