Valve Stem to Valve Guide Clearance

SPECIAL TOOLS

	Clearance Gauge, Valve Guide 303-004 (TOOL-6505-E) or equivalent
	Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent

NOTE: Refer to the appropriate Engine article for the specification.

NOTE: The valve stem diameter must be within specifications before checking valve stem-to-valve guide clearance.

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 clearance gauge contacts the upper surface of the valve guide.

Fig 1: Measuring Valve Stem To Valve Guide Clearance Using Valve Guide Clearance Gauge
Courtesy of FORD MOTOR CO.
Move the Valve Guide Clearance Gauge toward the Dial Indicator Gauge with Holding Fixture and zero the Dial Indicator Gauge. Move the Valve Guide Clearance Gauge away from the Dial Indicator Gauge with Holding Fixture and note the reading. The reading will be DOUBLE the valve stem-to-valve guide clearance.