Water Pump: Service and Repair
REMOVAL1. Disconnect negative (-) cable at battery.
2. Drain coolant.
3. Remove radiator outlet hose from thermostat cap (2).
4. Remove heater outlet pipe bolt (1).
5. Remove generator belt by loosening tensioner pulley.
6. Remove water pump assembly (1) by removing its 4 bolts (2).
NOTE: Do not lose dowel pin when removing water pump (1).
INSPECTION
CAUTION: Do not disassemble water pump. If any repair is required on pump, replace it as assembly.
Rotate water pump by hand to check for smooth operation. If pump does not rotate smoothly or makes abnormal noise, replace it.
^ Inspect water pump impeller for damage. Replace as necessary.
CAUTION: Do not disassemble water pump to check the water pump impeller.
INSTALLATION
1. Install new O-ring (1) to water pump (2).
NOTE: Do not forget to install dowel pins on water pump side before mounting water pump to engine block.
2. Install water pump (1) by using new bolts (2) to cylinder block and tighten to specified torque.
NOTE: Use new bolts (total of 4) to install water pump to engine block. Failure to do so may result water leakage.
Tightening torque
Water pump bolt (J20 engine) (a): 27 Nm (2.7 kg-m, 19.5 ft. lbs.)
3. Install heater outlet pipe bolt (1).
4. Install generator belt.
5. Install radiator outlet hose to thermostat cap (2).
6. Fill coolant.
7. Connect negative cable at battery.