Piston Ring End Gap

Check if inner diameter of cylinder bore is within specification. Refer to "PISTON TO CYLINDER BORE CLEARANCE ".
Insert piston ring until middle of cylinder with piston, and measure gap using a feeler gauge. Refer to "AVAILABLE PISTON ".
If out of specification, replace piston ring. If gap still exceeds the limit even with a new ring, re-bore cylinder and use oversized piston and piston ring.

Fig 1: Checking Piston Ring End Gap