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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 1.5L (LYX)) >> Repair Instructions - Off Vehicle >> Valve And Seat Grinding >> Valve Head O.D. and Chamfer Measurement Procedure

Valve Head O.D. and Chamfer Measurement Procedure

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    Fig 1: View Of Valve Head O.D. & Chamfer
    GM2371865Courtesy of GENERAL MOTORS COMPANY
  1. Measure the valve head O.D. and chamfer (a) using an appropriate scale. Refer to Engine Mechanical Specifications .
  2. If the valve head O.D. and chamfer is within specification, test the valve (1) for seat concentricity using the Valve-to-Seat Concentricity Measurement Procedure. Reinspect the valve head O.D. and chamfer after completing the concentricity measurement if valve seat reconditioning is performed.
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