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Home >> Infiniti >> 2004 >> QX56 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 649 (Engine Cooling System) >> Engine Cooling System >> Water Control Valve >> Removal And Installation

Removal And Installation

WARNING: This page is about a different car, the 2003 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Water Control Valve Components
G02208426Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Release fuel pressure.

    Refer to FUEL PRESSURE RELEASE .

  2. Remove undercover.
  3. Remove suspension member stay.
  4. Drain coolant from radiator.
  5. Remove engine cover.
  6. Remove air duct with air cleaner assembly.
  7. Disconnect wires, hoses, harness and so on.
  8. Remove upper intake manifold corrector.
  9. Remove intake manifold corrector support bolts.
  10. Remove lower intake manifold corrector.
  11. Disconnect injector harness connectors.
  12. Remove injector tube.
  13. Remove intake manifold.
  14. Remove water outlet housing and water control valve.
  15. Install water control valve and water outlet housing.
    Fig 2: Installing Water Control Valve
    G02208427Courtesy of NISSAN MOTOR CO., U.S.A.
    1. Install gum ring to thermostat.
    2. Point the arrow on the upper surface of the valve to the front of the engine, and also be sure to install the protrusions and the valve stopper so that they are aligned in a straight line.
  16. Reinstall any removed parts in reverse order of removal.
    • When installing intake manifold, injector tube and intake manifold collectors, refer to TIGHTENING PROCEDURES. 
    • After installation, run engine for a few minutes, and check for leaks. 
    • Be careful not to spill coolant over engine compartment. Use a rag to absorb coolant. 
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