Piston Ring: Testing and Inspection

INSPECTION
^ Inspect the piston rings for abnormal wear or damage. Replace if necessary.

PISTON RING END GAP





1. Insert the piston ring into the cylinder by hand and use the piston to push the piston ring to the bottom of the piston ring travel area.
2. Use a feeler gauge to measure the ring opening clearance (end gap all the way around the piston.
Ring Gap
Compression
Top: 0.25-0.28 mm (0.010-0.030 inch).
Bottom: 0.25-0.28 mm (0.010-0.030 inch).
Oil Ring
Steel Rail: 0.04-1.68 mm (0.016-0.066 inch).

PISTON RING-TO-GROOVE CLEARANCE





^ Measure the ring-to-groove clearances.
1st Ring: 0.04-0.08 mm (0.0015-0.0032 inch).
2nd Ring: 0.04-0.09 mm (0.0015-0.0035 inch).