Operation CHARM: Car repair manuals for everyone.

Piston Ring, Engine






Piston and cylinder dimensions

Determine ring gap
Piston Ring Dimensions
1. Compression Ring
New (0.20 in) 0.40 mm
Wear Limit 1.0 mm
2. Compression Ring
New (0.20 in) 0.40 mm
Wear Limit 1.0 mm
Oil scraper ring
New (0.25 in) 0.50 mm
Wear Limit 1.0 mm

Checking ring-to-groove clearance
Piston Ring Dimensions
1. Compression Ring
New (0.06 in) 0.09 mm
Wear Limit 0.25 mm
2. Compression Ring
New (0.05 in) 0.08 mm
Wear Limit 0.25 mm
Oil scraper ring
New (0.03 in) 0.06 mm
Wear Limit 0.15 mm