Thermostat: Service and Repair

THERMOSTAT

COMPONENTS:

REMOVAL
1. DRAIN ENGINE COOLANT





2. REMOVE WATER INLET
(a) Remove the 2 nuts and separate the water inlet with radiator hose from the cylinder block.





3. REMOVE THERMOSTAT
(a) Remove the thermostat from the cylinder block.
(b) Remove the gasket from the thermostat.

INSPECTION





1. INSPECT THERMOSTAT

HINT: The valve opening temperature is inscribed on the thermostat.





(a) Immerse the thermostat in water and gradually heat the water.
(b) Check the valve opening temperature of the thermostat.
Valve opening temperature: 80 to 84°C (176 to 183°F)

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





(c) Check the valve lift.
Valve lift: 8.5 mm (0.335 in.) or more at 95°C (203°F)

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

(d) Check that the valve is fully closed when the thermostat is at low temperatures (below 77°C (171°F))

If not fully closed, replace the thermostat.

INSTALLATION





1. INSTALL THERMOSTAT
(a) Install a new gasket onto the thermostat.
(b) Install the thermostat with the jiggle valve facing upward.

HINT: The jiggle valve may be set within 10° on either side, as shown in the illustration.





2. INSTALL WATER INLET
(a) Install the water inlet with radiator hose with the 2 nuts.
Torque: 9.0 N*m (92 kgf*cm, 80 in.*lbf)

3. ADD ENGINE COOLANT
4. CHECK FOR ENGINE COOLANT LEAKAGE