Chevrolet Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Ring End Gap

First Compression Ring .................................................................................................................................................. 0.18-0.39 mm (0.007-0.015 inch)
Second Compression Ring ............................................................................................................................................. 0.48-0.74 mm (0.019-0.029 inch)
Oil Control Ring ............................................................................................................................................................. 0.25-0.74 mm (0.010-0.029 inch)

Piston Ring to Groove Clearance

First Compression Ring ................................................................................................................................................ 0.03-0.076 mm (0.001-0.003 inch)
Second Compression Ring ........................................................................................................................................... 0.04-0.078 mm (0.002-0.003 inch)
Oil Control Ring ............................................................................................................................................................................... 0.09 mm (0.004 inch)

Piston Ring Thickness

First Compression Ring .............................................................................................................................................. 1.164-1.190 mm (0.046-0.047 inch)
Second Compression Ring .................................................................................................................................................... 1.472-1.490 mm (0.058 inch)
Oil Control Ring - Maximum .......................................................................................................................................................... 2.440 mm (0.096 inch)