Piston Ring, Engine

Piston Ring End Gaps [1]:
Top compression ring:
New 0.20-0.40 mm (0.0079-0.0157 in.)
Wear limit 1.0 mm (0.039 in.)
Bottom compression ring:
New 0.20-0.40 mm (0.0079-0.0157 in.)
Wear limit 1.0 mm (0.039 in.)
Oil scraper ring:
New 0.25-0.50 mm (0.0098-0.0197 in.)
Wear limit 1.0 mm (0.039 in.)

Piston Ring Side Clearances [2]:
Compression rings:
New 0.02-0.07 mm (0.0008-0.0028 in.)
Wear limit 0.15 mm (0.0059 in.)
Oil scraper ring:
New 0.02-0.06 mm (0.0008-0.0024 in.)
Wear limit 0.15 mm (0.0059 in.)

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[1]: Piston ring end gaps are checked with the piston rings inserted approximately 15 mm (5/8 in.) from the bottom of the cylinder.
[2]: Piston ring side clearance is checked using feeler gauges. Piston ring grooves should be thoroughly cleaned before checking ring side clearance. Measure each ring in its original groove.