Buick Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Ring End Gap

First Compression Ring .................................................................................................................................................. 0.15-0.36 mm (0.006-0.014 inch)
Second Compression Ring ......................................................................................................................................... 0.48-0.74 mm (0.0188-0.0291 inch)
Oil Control Ring ......................................................................................................................................................... 0.25-0.77 mm (0.0098-0.0303 inch)

Piston Ring to Groove Clearance

First Compression Ring .............................................................................................................................................. 0.04-0.086 mm (0.002-0.0033 inch)
Second Compression Ring ........................................................................................................................................... 0.04-0.08 mm (0.002-0.0031 inch)
Oil Control Ring ....................................................................................................................................................... 0.07-0.095 mm (0.0028-0.0037 inch)

Piston Ring Thickness

First Compression Ring .............................................................................................................................................. 1.164-1.190 mm (0.046-0.047 inch)
Second Compression Ring ..................................................................................................................................... 1.460-1.490 mm (0.0574-0.0586 inch)
Oil Control Ring - Maximum .......................................................................................................................................................... 2.960 mm (0.116 inch)