Water Pump: Service and Repair

Removal and Installation

CO-51 Component:

CAUTION:
^ When removing water pump, be careful not to get engine coolant on drive belts.
^ Water pump can not be disassembled and should be replaced as a unit.
^ After installing water pump, connect hose and clamp securely, then check for leaks using radiator cap tester (commercial service tool) and radiator cap tester adapter (commercial service tool).

REMOVAL
1. Remove following parts:
^ Front engine undercover (power tool)
^ Engine cover
^ Engine room cover (RH and LH)
^ Air duct (inlet)
^ Alternator, water pump and A/C compressor belt
2. Drain engine coolant from drain plugs on radiator and both side of cylinder block.

CAUTION:
^ Perform this step when engine is cold.
^ Never spill engine coolant on drive belts.

3. Remove water pump pulley.
4. Remove water pump.
^ Engine coolant will leak from cylinder block, so have a receptacle ready under vehicle.

CAUTION:
^ Handle the water pump vane so that it does not contact any other parts.
^ Never disassemble water pump.

INSPECTION AFTER REMOVAL





^ Visually check that there is no significant dirt or rusting on water pump body and vane.
^ Check there is no looseness in vane shaft, and that it turns smoothly when rotated by hand.
^ If anything is found, replace water pump.

INSTALLATION
Installation is the reverse order of removal.

INSPECTION AFTER INSTALLATION
^ Check for leaks of engine coolant using radiator cap tester adapter (commercial service tool) and radiator cap tester (commercial service tool). Refer to, "Inspection". System Inspection
^ Start and warm up engine. Visually check if there is no leaks of engine coolant.