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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 199 (Engine Mechanical - 3.6L (LF4) - Repair Instructions (4 Of 4)) >> Repair Instructions >> Valve and Seat Grinding >> Valve Visual Inspection Procedure

Valve Visual Inspection Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM156174

    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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