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Home >> Chevrolet >> 2006 >> Impala LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Mechanical - 3.6L (Ly7) (Repair Instructions -- 3 Of 5)) >> Off-Vehicle Repair Instructions - Part 2 >> Valve and Seat Grinding >> Valve Visual Inspection Procedure

Valve Visual Inspection Procedure

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Inspection Points For Valves Damage
    GM156174Courtesy of GENERAL MOTORS CORP.
  1. Inspect the valve for damage from the head to tip for the following conditions:
    • Pitting in the valve seat area (1)
    • Lack of valve margin (2)
    • Bending in the valve stem (3)
    • Pitting or excessive wear in the stem (4)
    • Worn valve key grooves (5)
    • Worn valve tip (6)
  2. Replace the valve if any of these conditions exist.
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