Valve Stem to Valve Guide Clearance

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

Illustration	Tool Name	Tool Number
	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: 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

Courtesy of FORD MOTOR CO.

Move the clearance gauge toward the indicator and zero the indicator. Move the clearance gauge away from the indicator and note the reading. The reading will be DOUBLE the valve stem-to-valve guide clearance.