Valve Guide Inner Diameter

NOTE: Refer to the appropriate ENGINE - 5.4L (3V) 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.

Fig 1: Identifying Inside Diameter Of Valve Guides
Courtesy of FORD MOTOR CO.
Measure the ball gauge with a micrometer.

Fig 2: Checking Inside Diameter Of Valve Guides Using Ball Gauge With Micrometer
Courtesy of FORD MOTOR CO.
If the valve guide is not within specifications, install a new cylinder head assembly.