Removal and Installation

THERMOSTAT


Removal and Installation


REMOVAL
1. Drain engine coolant from radiator. Changing Engine Coolant.

CAUTION:
- Perform this step when engine is cold.
- Never spill engine coolant on drive belt.
2. Remove the air duct (inlet). Component.
3. Remove the radiator hose (lower) from the engine. Component.
4. Remove water inlet.
5. Remove thermostat.
6. Remove water pump, if necessary. Component Removal and Installation.
7. Remove thermostat housing, if necessary.

INSPECTION AFTER REMOVAL





- Place a thread (A) so that it is caught in the valves of thermostat
(1). Immerse fully in a container (B) filled with water. Heat while stirring.
- The valve opening temperature is the temperature at which the valve opens and falls from the thread.
- Continue heating. Check the full-open valve lift amount.

NOTE:
The full-open valve lift amount standard temperature for the thermostat is the reference value.
- After checking the full-open valve lift amount, lower the water temperature and check the valve closing temperature.





- If out of the specification, replace thermostat.

INSTALLATION
Installation is in the reverse order of removal.
- Use the following procedure to install the thermostat.





- Install thermostat making sure rubber ring (1) groove fits securely to thermostat flange (A).

CAUTION:
Replace the rubber ring with a new one.





- Install thermostat (1) into the thermostat housing (2) with jiggle valve (A) facing upwards.
- Use the following procedure to install the thermostat housing.
- Securely insert the rubber ring into the mating groove of thermostat housing and install it.

CAUTION:
Replace the rubber ring with a new one.
- Install the thermostat housing to the cylinder block without displacing the gasket from the gasket position.