Piston Ring: Testing and Inspection

CHECKING PISTON RING GAP





- Push ring squarely from above down to approx. 15 mm (0.5910 inch) from bottom end of cy1inder.
- To do this use a piston without rings as an installation tool.

Piston ring Gap

Compression rings:

^ New: 0.20-0.40 mm (0.0078-0.0157 inch).
^ Wear limit: 1.00 mm (0.0394 inch).

Oil Scraper Ring:
^ New: 0.25-0.50 mm (0.0098-0.0197 inch).
^ Wear limit: 1.00 mm (0.0394 inch).


CHECKING PISTON RING SIDE CLEARANCE





- Clean ring groove before measurement.

Piston ring side clearance

Compression rings:

^ New: 0.02-0.07 mm (0.0007-0.0028 inch).
^ Wear limit: 0.15 mm (0.0059 inch).

Oil scraper ring:
^ New: 0.02-0.06 mm (0.0007-0.0023 inch).
^ Wear limit: 0.15 (0.0059 inch).