Buick Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Rings

Piston Ring End Gap

First Compression Ring .................................................................................................................................... 0.150-0.300 mm (0.0059-0.0118 inch)
Second Compression Ring ............................................................................................................................... 0.280-0.480 mm (0.0110-0.0189 inch)
Oil Control Ring ............................................................................................................................................... 0.150-0.600 mm (0.0059-0.0236 inch)

Piston Ring to Groove Clearance

First Compression Ring .................................................................................................................................... 0.030-0.065 mm (0.0012-0.0026 inch)
Second Compression Ring ............................................................................................................................... 0.015-0.060 mm (0.0006-0.0024 inch)
Oil Control Ring ............................................................................................................................................... 0.030-0.170 mm (0.0012-0.0067 inch)

Piston Ring Thickness

First Compression Ring .................................................................................................................................... 1.175-1.190 mm (0.0463-0.0469 inch)
Second Compression Ring ............................................................................................................................... 1.470-1.495 mm (0.0579-0.0589 inch)
Oil Control Ring ............................................................................................................................................... 2.360-2.480 mm (0.0929-0.0976 inch)