Valve Guide Inner Diameter

WARNING: This page is about a different car, the 2018 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to the appropriate information 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.