Water Pump: Service and Repair

WATER PUMP





COMPONENTS

REMOVAL

1. Drain the coolant and disconnect the radiator outlet hose and water by-pass hose from the water pump.

2. Remove the drive belt and water pump pulley.

3. Remove the timing belt covers and the timing belt tensioner.

4. Remove the water pump mounting bolts and then remove the alternator brace.

5. Remove the water pump assembly from the cylinder block.





INSPECTION

1. Check the water pump for cracks, damage or wear, and replace the water pump assembly if necessary.

2. Check the bearing for damage, abnormal noise and sluggish rotation, and replace the water pump assembly if necessary.

3. Check the seal unit for leaks, and replace the water pump assembly if necessary.

4. Check for water leakage. If water leaks from hole "A", seal unit is defective. Replace water pump assembly.

INSTALLATION





1. Clean the gasket surfaces of the water pump body and the cylinder block.

2. Install the new 0-ring onto the groove on the front end of the water pipe, then wet the 0-ring with water. Do not apply oil or grease.

3. Install new water pump gasket and water pump assembly. Tighten the bolts to specified torque.





Tightening torque
Water pump to cylinder block
Head mark "4" bolt
12-15 Nm (120-150 kg.cm, 9-11 lb.ft)
Head mark "7" bolt
20-27 Nm (200-270 kg.cm, 14-20 lb.ft)

4. Install the timing belt tensioner and timing belt. Adjust the timing belt tension, and then install the timing belt covers.

5. Install the water pump pulley and drive belt, and then adjust the belt tension.

6. Refill the coolant.

7. Run the engine and check for leaks.