Piston Ring: Testing and Inspection

PISTON RING END GAP





- Insert bare ring into cylinder.
- Push down squarely on piston ring until it is approx. 15 mm from bottom edge of cylinder.

^ New:
1st Compression Ring: 0.06-0.09 mm (0.0024-0.0036 inch).
2nd Compression Ring: 0.05-0.08 mm (0.0020-0.0032 inch).
Oil Scraper Ring: 0.03-0.06 mm (0.0012-0.0024 inch).

^ Wear Limit:
1st Compression Ring: 0.25 mm (0.0098 inch).
2nd Compression Ring: 0.25 mm (0.0098 inch).
Oil Scraper Ring: 0.15 mm (0.0059 inch).


RING TO GROOVE CLEARANCE





- Clean piston ring groove before checking

^ New:
1st Compression Ring: 0.06-0.09 (0.0024-0.0036 inch).
2nd Compression Ring: 0.05-0.08 (0.0020-0.0032 inch).
Oil Scraper Ring: 0.03-0.06 (0.0012-0.0024 inch).

^ Wear Limit:
1st Compression Ring: 0.25 (0.0098 inch).
2nd Compression Ring: 0.25 (0.0098 inch).
Oil Scraper Ring: 0.15 (0.0059 inch).