Ford 2003 Mustang Workshop Manual page 911

SECTION 303-00: Engine System — General Information
GENERAL PROCEDURES
Valve Stem to Valve Guide Clearance
Special Tool(s)
Dial Indicator Gauge with
Holding Fixture
100-002 (TOOL-4201-C) or
equivalent
Clearance Gauge, Valve Guide
303-004 (TOOL-6505-E) or
equivalent
NOTE: Valve stem diameter must be within specifications before checking valve stem to valve guide
clearance.
1. NOTE: If necessary, use a magnetic base.
Install a Valve Guide Clearance Gauge on the valve stem and install a Dial Indicator Gauge with
Holding Fixture. Lower the valve until the Valve Guide Clearance Gauge contacts the upper
surface of the valve guide.
2. Move the Valve Guide Clearance Gauge toward the indicator and zero the indicator. Move the
Valve Guide Clearance Gauge away from the indicator and note the reading. The reading will
be DOUBLE the valve stem-to-valve guide clearance. Valves with oversize stems will need to
be installed if out of specification.
2003 Mustang Workshop Manual