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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 414 (Engine Mechanical - 4.8L, 5.3L, & 6.0L (Unit Repair)) >> Repair Instructions >> Piston, Connecting Rod, and Bearings Cleaning and Inspection >> Measuring Piston Ring End Gap

Measuring Piston Ring End Gap

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IMPORTANT: Do not attempt to file the end of the piston ring for fit in the cylinder bore.
IMPORTANT: Measure the piston ring in the cylinder in which the piston ring will be used.
  1. Place the piston ring into the cylinder bore.
  2. Push the piston ring into the bore 6.5 mm (0.25 in) below the piston ring travel area.
  3. Insert a feeler gage and measure the piston ring end gap. Refer to Engine Mechanical Specifications (LR4 VIN V)  or Engine Mechanical Specifications (LM7 VIN T/L59 VIN Z)  or Engine Mechanical Specifications (LQ4 VIN U/LQ9 VIN N) .
    Fig 1: Measuring Piston Ring End Gap
    G01674729Courtesy of GENERAL MOTORS CORP.
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