Piston Ring-to-Groove Clearance

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

Illustration	Tool Name	Tool Number
Courtesy of FORD MOTOR CO.	Feeler Gauge Set	303-D027 (D81L-4201-A) or equivalent

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

Inspect the piston for ring land damage or accelerated wear.

Fig 1: Identifying Piston Ring Grooves
Courtesy of FORD MOTOR CO.
Using the Feeler Gauge Set, measure the piston ring-to-groove clearance.

Fig 2: Measuring Piston Ring-To-Groove Clearance
Courtesy of FORD MOTOR CO.