Piston Rings End Gap
End Gap1. Using a piston, push a new ring into the cylinder bore 15-20 mm (0.6 - 0.8 in) from the bottom.
2. Measure the piston ring end-gap with a feeler gauge:
- If the gap is too small, check to see if you have the proper rings for your engine.
- If the gap is too large, recheck the cylinder bore diameter against the wear limits. If the bore is over the service limit, the cylinder block must be rebored.