Service Procedures

FITTING RINGS
1. Measurement of end gaps:
a. Measure piston ring gap 2 inches from bottom of cylinder bore. An inverted piston can be used to push the rings down to ensure positioning rings squarely in the cylinder bore before measuring.
b. Insert feeler gauge in the gap. The top compression ring gap should be between 0.254 - 0.508 mm (0.010 - 0.020 inch). The second compression ring gap should be between 0.508 - 0.762 mm (0.020 - 0.030 inch). The oil ring gap should be 0.254 - 1.270 mm (0.010 - 0.050 inch).
c. Rings with insufficient end gap may be properly filed to the correct dimension. Rings with excess gaps should not be used.