Water Pump: Service and Repair

ENGINE COOLANT PUMP





COMPONENTS

REMOVAL
1. Drain the coolant and disconnect the coolant pump inlet pipe.
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, then remove the alternator brace.
5. Remove the engine coolant pump assembly from the cylinder block.

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





4. Check for engine coolant leakage. If the engine coolant leaks, the seal is defective. Replace the engine coolant pump assembly.

INSTALLATION
1. Clean the gasket surfaces of the engine coolant pump body and the cylinder block.





2. Install the new O-ring onto the groove on the front end of the engine coolant pipe, then wet the O-ring with water. Do not apply oil or grease.
3. Install a new engine coolant pump gasket and engine coolant pump assembly. Tighten the bolts to the specified torque.
Tightening torque
Engine coolant pump bolt 20 - 27 Nm (200 - 270 kg-cm, 14 - 20 ft. lbs.)
4. Install the timing belt tensioner and timing belt. Adjust the timing belt tension, then install the timing belt covers.
5. Install the engine coolant pump pulley and drive belt, then adjust the belt tension.
6. Refill the coolant.





7. Run the engine and check for leaks.