Ring End Gap

Special Tools:

CAUTION: Use care when fitting piston rings to avoid possible damage to the piston ring or the cylinder bore.

NOTE: Cylinder bore must be within specification for taper and out-of-round to fit piston rings. Also the piston without rings is used as a tool in this procedure to assure that ring is square in the cylinder bore.





1. Push a piston into a cylinder to the bottom of ring travel using a piston without rings





2. CAUTION: Do not reinstall used piston rings. A special break-in finish, and sometimes an anti-scuff coating, is given to new piston rings by the factory. The purpose of the special finish is to help the new piston rings and cylinder bore mate correctly. The special finish, like the crosshatching on the cylinder bore, wears off during break-in. The special finish will be already worn off used piston rings so they probably will not seat correctly. For this reason attempting to reuse piston rings could lead to excess oil consumption and possible cylinder scoring.

Using the special tool, measure the top piston ring end gap.
- Verify that the piston ring end gap is within specification.