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Home >> GMC >> 1999 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 4.3L V6, 5.0L, 5.7L & 7.4L V8 - VINS [W,X,M,R,J]) >> Overhaul >> Cylinder Block Assembly >> Piston Rings

Piston Rings

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Measure piston ring end gap and side clearance. If measurement s not within specification, replace piston and/or rings as necessary. See appropriate PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS. Install rings with mark on ring facing upward. Position ring end gaps around circumference of piston as shown. See Fig 1.

Fig 1: Positioning Piston Ring End Gaps
G95F27057Courtesy of GENERAL MOTORS CORP.