Valve Stem to Valve Guide Clearance

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

Illustration	Tool Name	Tool Number
	Dial Indicator with Bracketry	100-002 (TOOL-4201-C) or equivalent
	Valve Guide Clearance Gauge	303-004 (TOOL-6505-E) or equivalent

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

NOTE: If necessary, use a magnetic base.

Fig 1: Measuring Valve Stem To Valve Guide Clearance

Courtesy of FORD MOTOR CO.

Install a valve clearance gauge on the valve stem and install a dial indicator. Lower the valve until the valve clearance gauge contacts the upper surface of the valve guide.
Move the valve clearance gauge toward the indicator and zero the indicator. Move the valve 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.