Grand Cherokee 2WD V6-3.7L (2008)
Piston Ring: Service and Repair
PISTON RING FITTING
Before reinstalling used rings or installing new rings, the ring clearances must be checked.
1. Wipe the cylinder bore clean.
2. Insert the ring in the cylinder bore.
NOTE: The ring gap measurement must be made with the ring positioned at least 12 mm (0.50 in.) from bottom of cylinder bore.
3. Using a piston, to ensure that the ring is squared in the cylinder bore, slide the ring downward into the cylinder.
4. Using a feeler gauge (1), check the ring end gap. Replace any rings not within specification.
PISTON RING SIDE CLEARANCE
NOTE: Make sure the piston ring grooves are clean and free of nicks and burrs.