Piston Ring End Gap

CAUTION: Make sure all carbon deposits are Removed and the top of the cylinder bore is clean before measuring piston ring end gap.

1. Using a piston, insert each compression ring 96 mm (3.78 inches) into the cylinder bore.





2. Measure compression ring end gap using a feeler gage.
- Standard upper compression ring end gap is 0.250 to 0.350 mm (0.0098 to 0.0138 inch). If end gap exceeds 1.05 mm (0.0413 inch), replace ring. If the new ring gap exceeds 1.05 mm (0.0413 inch), rebore all four cylinders and use oversized pistons or replace cylinder block.
- Standard lower compression ring end gap is 0.350 to 0.500 mm (0.0138 to 0.0197 inch). If end gap exceeds 1.20 mm (0.0472 inch), replace ring. If new ring gap exceeds 1.20 mm (0.0472 inch), rebore all four cylinders and use oversized pistons or replace cylinder block.
3. Remove the compression rings and insert the oil ring 96 mm (3.78 inches) into the top of the cylinder bore.
4. Measure oil ring side rail end gap using a feeler gage.
- Standard oil side rail gap is 0.100 to 0.400 mm (0.0039 to 0.0157 inch). If end gap exceeds 1.05 mm (0.0413 inch), replace ring. If the new ring gap exceeds 1.05 mm (0.0413 inch), rebore all four cylinders or replace cylinder block.