Piston Ring End Gap

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Special Tool(s)

Courtesy of FORD MOTOR COMPANY

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 the appropriate Engine article for the specification.

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

1.

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

Courtesy of FORD MOTOR COMPANY

2.

Use the Feeler Gauge Set to measure the top piston ring end gap and the second piston ring end gap.

Courtesy of FORD MOTOR COMPANY