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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 1.2L (LIH)) >> Repair Instructions >> Water Pump Cleaning and Inspection >> Inspection Procedure

Inspection Procedure

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  1. GM5281142Courtesy of GENERAL MOTORS COMPANY

    Inspect the exterior of the water pump rear housing for the following:

    • Damage to the water pump housing bolt holes (5)
    • Damage to the water pump housing sealing surface (1, 3)
    • Damage or deformations of the location pin (2, 4)
    • Damage, corrosion or restrictions
  2. Repair or replace the water pump rear housing as necessary.
  3. GM5281145Courtesy of GENERAL MOTORS COMPANY

    Inspect the exterior of the water pump for the following:

    • Rotate the water pump impeller (4) and inspect for damage.
    • Damage to the water pump pulley hub (1).
    • Damage to the water pump bolt holes (2)
    • Damage to the water pump sealing surface (3)
    • Damage or deformations of the location pins (5)
    • Damage, corrosion or restrictions
  4. Repair or replace the water pump as necessary.
  5. Inspect the water pump pulley, replace as necessary.