Water Pump

REMOVAL 

1. Remove the electric cooling fan. Refer to FAN, COOLING, ELECTRIC, REMOVAL AND INSTALLATION .
2. Drain the cooling system. Refer to DRAINING  .
3. Disconnect the Engine Cooling Temperature (ECT) sensor wire harness connector.
4. Remove the belt tensioner. Refer to TENSIONER, BELT, REMOVAL AND INSTALLATION .

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   1 - Upper Radiator Hose

   2 - Heater Hose

   3 - Lower Radiator Hose

5. Disconnect the upper radiator hose and position aside.
6. Disconnect the heater hose and position aside.
7. Disconnect the lower radiator hose and position aside.

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   1 - Coolant Tube Nut

   2 - Coolant Tube

8. Remove the coolant tube nut securing the coolant tube.

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   1 - Water Pump Bolts

   2 - Water Pump

9. Remove the water pump bolts and the water pump.

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   1 - Thermostat Housing

   2 - Thermostat Housing Bolts

10. Remove the thermostat housing bolts, thermostat housing and the thermostat.

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    1 - ECT Sensor

11. Remove the ECT sensor from the water pump.

INSPECTION AND CLEANING 

Before reinstalling a previously removed water pump, ensure proper function by inspecting the following:

• Pump assembly for cracks in the housing
• Water leaks from the shaft seal, as seen by wet coolant or stains from dried coolant around the weep chamber
• Worn bearing, felt by uneven or rough spinning of the pulley
• Impeller rubbing either the pump body or the timing chain case/cover, as seen by rubbing or scraping witness marks.

Clean the gasket mating surface. Use caution not to damage the gasket sealing surface. To ensure proper gasket sealing, surface preparation must be performed, especially with the use of aluminum engine components. Never  use the following to clean gasket surfaces:

• Metal scraper.
• Abrasive pad or paper to clean cylinder block and head.
• High speed power tool with an abrasive pad or a wire brush.
• High speed power tool with 3M Roloc™ Bristle Disc (white or yellow).

Only  use the following for cleaning gasket surfaces:

• Solvent or a commercially available gasket remover
• Plastic or wood scraper.

INSTALLATION 

1. Clean the water pump gasket mating surfaces.
2. Install the Engine Cooling Temperature (ECT) sensor to the water pump and tighten the ETC sensor to the proper torque specification. Refer to TORQUE SPECIFICATIONS  .
3. Install the thermostat, thermostat housing and tighten the thermostat housing bolts to the proper torque specification. Refer to TORQUE SPECIFICATIONS  .
4. Install a NEW  gasket on the water pump.
5. Install the water pump and tighten the water pump bolts to the proper torque specification. Refer to TORQUE SPECIFICATIONS  .
6. Using a NEW  O-ring, install the coolant tube and tighten the coolant tube nut to the proper torque specification. Refer to TORQUE SPECIFICATIONS  .
7. Install the belt tensioner. Refer to TENSIONER, BELT, REMOVAL AND INSTALLATION .
8. Connect the lower radiator hose.
9. Connect the heater hose.
10. Connect the upper radiator hose to the thermostat housing.
11. Connect the ECT sensor wire harness connector.
12. Install the electric cooling fan. Refer to FAN, COOLING, ELECTRIC, REMOVAL AND INSTALLATION .
13. Fill cooling system. Refer to COOLING SYSTEM FILLING  .
14. Start and warm the engine. Check for coolant leaks. Refer to COOLING SYSTEM LEAKS  .