Thermostat: Service and Repair

REMOVAL

Components:

THERMOSTAT

NOTE
Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat.

1. Drain engine coolant so its level is below thermostat.
2. Remove the coolant inlet fitting(A) and the thermostat(B).





INSPECTION

THERMOSTAT
1. Immerse the thermostat in water and gradually heat water.





2. Check the valve opening temperature.

Valve opening temperature: 82°C (177°F)

Full opening temperature: 95°C (205°F)

If the valve opening temperature is not as specified, replace the thermostat.

3. Check the valve lift.

Valve lift: Min. 10mm (0.4in.) at 95°C (205°F)

If the valve lift is not as specified, replace the thermostat.

INSTALLATION

THERMOSTAT
1. Place thermostat(B) in coolant inlet pitting(A).

Install the thermostat with the jiggle valve upward.

2. Install the coolant inlet pitting(A).





3. Fill with engine coolant.
4. Start engine and check for leaks.