Mustang GT V8-4.6L SOHC VIN X (1998)
Piston Ring: Testing and Inspection
Ring to Groove Clearance
NOTE: If lower lands have high steps, piston should be replaced.
Check piston ring side clearance of compression rings with Feeler Gauge 303-D027 (D81L-4201-A) or equivalent inserted between piston ring and its
lower land. Gauge should slide freely around entire piston ring circumference without binding. Any wear that occurs will form a step at inner portion of
lower land.
If clearance is greater than service limit, replace piston ring. If clearance exceeds service limit, even with a new piston ring, replace piston.
