Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

Fig 1: Inspecting Front Of Water Outlet Housing

GM1041044

Courtesy of GENERAL MOTORS CORP.

Inspect the front of the water outlet housing for the following:
- Damage or restrictions to the radiator hose connection (1)
- Damage to the threads for the heater hose fitting (2)
- Damage to the threads for the throttle body bolts (3)
- Damage to the threads for the engine coolant air bleed fitting (4)
- Damage to the water outlet housing-to-cylinder head mounting holes (5)
- Damage or restrictions to the bypass hose connection (6)

Fig 2: Inspecting Rear Of Water Outlet Housing

GM1041052

Courtesy of GENERAL MOTORS CORP.

Inspect the rear of the water outlet housing for the following:
- Damage, blockage or excessive corrosion to the engine coolant passages (1)
- Damage or restrictions to the EVAP purge solenoid port (2)
- Damage to the threads for the EVAP purge solenoid bolt (3)
- Damage to the sealing surface for the intake manifold duct (4)
- Damage or restrictions to the MAP sensor port (5)
- Damage to the threads for the MAP sensor bolt (6)
Repair or replace the water outlet housing as necessary.