Diesel Data: Automotive Repair

Piston Ring, Engine

Piston Ring

Ring-to-Groove Clearance

Top 0.045 - 0.090 mm (0.0018 - 0.0035 in.)

Service Limit 0.135 mm (0.005 in.)

Second 0.040 - 0.070 mm (0.0016 - 0.0028 in.)

Service Limit 0.13 mm (0.005 in.)

Ring End Gap

Top 0.25 - 0.35 mm (0.010 - 0.014 in.)

Service Limit 0.60 mm (0.24 in.)

Second 0.60 - 0.75 mm (0.024 - 0.030 in.)

Service Limit 0.90 mm (0.035 in.)

Oil 0.20 - 0.70 mm (0.008 - 0.028 in.)

Service Limit 0.80 mm (0.031 in.)