Valve Guide Inner Diameter

General Procedure

NOTE: Refer to general specifications in the appropriate Engine article for the appropriate 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.

GFD34021

Courtesy of FORD MOTOR COMPANY

2.

Measure the ball gauge with a micrometer.

GFD34022

Courtesy of FORD MOTOR COMPANY

3.

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