Durango 4WD V8-5.9L VIN Z (1998)
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.
