Grand Cherokee 2WD V8-318 5.2L VIN Y MFI (1994)
Piston Ring: Service and Repair
Installation
1. Install rings, and confirm ring side clearance:
a. Install oil rings being careful not to nick or scratch the piston. Install the oil control rings according to instructions in the package. It is not
necessary to use a tool to install the upper and lower rails. Insert oil rail spacer first, then side rails.
b. Install the second compression rings using Installation Tool C-4184, or equivalent. The compression rings must be installed with the
identification mark face up (toward top of piston) and chamfer facing down. An identification mark on the ring is a drill point, a stamped letter
"O", an oval depression, or the word "TOP".
c. Using a ring installer, install the top compression ring with the chamfer facing up. An identification mark on the ring is a drill point, a stamped
letter "O", an oval depression or the word "TOP" facing up.
d. Measure side clearance between piston ring and ring land. Clearance should be 0.074 - 0.097 mm (0.0029 - 0.0038 inch) for the compression
rings. The steel rail oil ring should be free in groove, but should not exceed 0.246 mm (0.0097 inch) side clearance.
e. Pistons with insufficient, or excessive, side clearance should be replaced.
