Operation CHARM: Car repair manuals for everyone.

Piston Ring, Engine

Piston Ring
Piston Ring End-Gap
Top Ring:
Standard (New) 0.20 - 0.35 mm (0.008 - 0.014 inch)
Service Limit 0.60 mm (0.024 inch)

Second Ring:
Standard (New) 0.50 - 0.65 mm (0.020 - 0.026 inch)
Service Limit 0.75 mm (0.030 inch)

Oil Ring:
Standard (New) 0.20 - 0.70 mm (0.008 - 0.028 inch)
Service Limit 0.80 mm (0.031 inch)





Top Ring Clearance
Standard (New) 0.045 - 0.070 mm (0.0018 - 0.0028 inch)
Service Limit 0.13 mm (0.005 inch)

Second Ring Clearance
Standard (New) 0.040 - 0.065 mm (0.0016 - 0.0026 inch)
Service Limit 0.13 mm (0.005 inch)