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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Engine Mechanical - 1.4L (LV7) - Repair Instructions - Off Vehicle) >> 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: Valve Head O.D. And 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 (L5Q)Engine Mechanical Specifications (LV7) .
  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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