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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Engine Mechanical - 3.6L (LF4 LGX) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Valve and Seat Grinding >> Valve Margin Measurement Procedure

Valve Margin Measurement Procedure

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Valve Margin Measurement
    GM57502Courtesy of GENERAL MOTORS COMPANY
  1. Measure the valve margin using an appropriate scale.
  2. Reference the specifications in this section for minimum valve margin and compare them to your measurements.
  3. If the valve margins are beyond specification, replace the valves.
  4. If the valve margins are within specification, test the valve for seat concentricity using the Valve-to-Seat Concentricity Measurement Procedure.