Valve Guide Inner Diameter

For information on Ford Color Coded Illustrations, refer to OEM COLOR CODING

NOTE: Refer to the appropriate Engine article for the specification.

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
Measure the ball gauge with a micrometer.

Courtesy of FORD MOTOR COMPANY
If the valve guide is not within specifications, install a new cylinder head assembly.