Water Pump: Service and Repair

REMOVAL

1. Drain the coolant and disconnect the radiator outlet hose and Engine coolant by-pass hose from the engine coolant pump.
2. Remove the drive belt and engine coolant pump pulley.
3. Remove the timing belt covers and the timing belt tensioner.
4. Remove the engine coolant pump mounting bolts and then remove the alternator brace.
5. Remove the engine coolant pump assembly from the cylinder block.


INSPECTION

1. Check the engine coolant pump for cracks, damage or wear, and replace the engine coolant pump assembly if necessary.
2. Check the bearing for damage, abnormal noise and sluggish rotation, and replace the engine coolant pump assembly if necessary.
3. Check the seal unit for leaks, and replace the engine coolant pump assembly if necessary.






4. Check for engine coolant leakage. If the engine coolant leaks from hole "A" seal unit is defective. Replace engine coolant pump assembly.


INSTALLATION

1. Clean the gasket surfaces of the engine coolant pump body and the cylinder block.
2. Install the new 0-ring onto the groove on the front end of the engine coolant pipe, then wet the 0-ring with engine coolant. Do not apply oil or grease.





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


Tightening torque - Engine coolant pump 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 engine coolant pump pulley and drive belt, and then adjust the belt tension.
6. Refill the coolant.
7. Run the engine and check for leak.