Special Tool(s)

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

SPECIAL TOOL SPECIFICATION

Courtesy of FORD MOTOR CO.

Feeler Gauge Set
303-D027 (D81L-4201-A) or equivalent

NOTE: Use care when fitting piston rings to avoid possible damage to the piston ring or the cylinder bore.

NOTE: Piston rings should not be transferred from one piston to another.

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

NOTE: The cylinder bore must be within specification for taper and out-of-round.

Use a piston without rings to push a piston ring in a cylinder to the bottom of ring travel.

Fig 1: Pushing Piston Ring In Cylinder To Bottom Of Ring Travel
Courtesy of FORD MOTOR CO.
Use the Feeler Gauge Set to measure the top piston ring end gap and the second piston ring end gap.

Fig 2: Measuring Piston Ring End Gap
Courtesy of FORD MOTOR CO.