Thermostat: Service and Repair

THERMOSTAT AND WATER CONTROL VALVE

Components:

Removal and Installation
REMOVAL
1. Remove engine room cover (RH and LH).
2. Remove engine cover with power tool.
3. Remove air duct (inlet).
4. Drain engine coolant from drain plugs on radiator and both side of cylinder block.

CAUTION:
^ Perform this step when engine is cold.
^ Do not spill engine coolant on drive belts.

5. Disconnect water suction hose from water inlet.
6. Remove water inlet and thermostat.

CAUTION: Do not disassemble thermostat.

7. Remove intake manifolds (upper and lower).
8. Disconnect radiator hose (upper) from thermostat housing.
9. Disconnect heater hoses from water outlet and heater pipe.
10. Remove thermostat housing, water outlet pipe, water connector, water control valve, water outlet and heater pipe.

CAUTION: Do not disassemble water control valve.

INSTALLATION
Note the following, and install in the reverse order of removal.

CAUTION: Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.

Thermostat and Water Control Valve





^ Install thermostat and water control valve with the whole circumference of each flange part fit securely inside rubber ring. (The example in the figure shows thermostat.)





^ Install thermostat with jiggle valve facing upwards. (The position deviation may be within the range of ±10 degrees)
^ Install water control valve with the up-mark facing up and the frame center part facing upwards. (The position deviation may be within the range of ±10 degrees)

Water Outlet Pipe and Heater Pipe
First apply a neutral detergent to O-rings, then quickly insert the insertion parts of the water outlet pipe and heater pipe into the installation holes.