Buick Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Ring End Gap

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

Piston Ring to Groove Clearance

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

Piston Ring Thickness

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