Ford 2003 Mustang Workshop Manual page 914

SECTION 303-00: Engine System — General Information
GENERAL PROCEDURES
Valve —Guide Inner Diameter
1. Measure the inner diameter of the valve guides in two directions where indicated.
Refer to the appropriate section in Group
2. If the valve guide is not within specifications, ream the valve guide and install a valve with an
oversize stem or remove the valve guide and install a new valve guide.
2003 Mustang Workshop Manual
303 for the procedure.