Cadillac Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Rings

Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore

Production ...............................................................................................................................................................  0.31 - 0.52 mm (0.012 0.02 inch)
Service ...............................................................................................................................................................  0.31 - 0 59 mm (0.0122 - 0.023 inch)

Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore

Production .................................................................................................................................................................  0.51 - 0.77 mm (0.02 0.03 inch)
Service ...................................................................................................................................................................  0.51 - 0.84 mm (0.02 - 0.033 inch)

Piston Ring End Gap - Oil Control Ring - Measured in Bore

Production Cylinder ..........................................................................................................................................  0.31 - 0.87 mm (0.0122 - 0.034 inch)
Service ............................................................................................................................................................  0.31 - 0 94 mm (0.0122 - - 0.037 inch)

Piston Ring to Groove Clearance - First Compression Ring

Production .....................................................................................................................................................  0.035 - 0.08 mm (0.0014 - 0.0031 inch)
Service ...........................................................................................................................................................  0.035 - 0.08 mm (0.0014 - 0.0031 inch)

Piston Ring to Groove Clearance - Second Compression Ring

Production ...................................................................................................................................................  0.034 - 0.079 mm (0.0013 - - 0.003 inch)
Service ........................................................................................................................................................  0.034 - 0.079 mm (0.0013 - - 0.003 inch)

Piston Ring to Groove Clearance - Oil Control Ring

Production ...................................................................................................................................................  0.012 - 0 2 mm (0.00047 - 0.00078 inch)
Service .........................................................................................................................................................  0.012 - 0.2 mm (0.00047 - 0.00078 inch)