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Home >> Hummer >> 2007 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 1805 (Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L - Repair Instructions - Off Vehicle (1 Of 3)) >> Piston, Connecting Rod, and Bearing Cleaning and Inspection (L9H and L94) >> Measuring Piston Ring End Gap

Measuring Piston Ring End Gap

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Measuring Piston Ring End Gap
    GM4968Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • Do not attempt to file the end of the piston ring to achieve the proper end gap clearance.
    • Measure the piston ring in the cylinder in which it will be used.
  1. Place the piston ring into the cylinder bore 6.5 mm (0.25 in) below the top of the ring travel area. Both rings should be installed with the orientation marks facing the top of the piston.
  2. Insert a feeler gauge and measure the piston ring end gap. Refer to Engine Mechanical Specifications (RPO L20 VIN A) or Engine Mechanical Specifications (RPO L96 VIN G) or Engine Mechanical Specifications (RPO L9H) or Engine Mechanical Specifications (RPO LC9 VIN 3) or Engine Mechanical Specifications (RPO LMG VIN 0) or Engine Mechanical Specifications (RPO LY6 VIN K) .
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