SECTION 303-00: Engine System — General Information
2014 Mustang Workshop Manual
GENERAL PROCEDURES
Procedure revision date: 01/07/2013

Valve Guide Inner Diameter

NOTE: Refer to the appropriate Section 303-01 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.
  1. Measure the ball gauge with a micrometer.
  1. If the valve guide is not within specifications, install a new cylinder head assembly.