4 Runner 4WD V8-4.7L (2UZ-FE) (2003)
Thermostat: Service and Repair
REPLACEMENT
HINT: 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
2. SEPARATE WATER INLET
a. Remove the 3 nuts, and separate the water inlet from the water inlet housing.
3. REMOVE THERMOSTAT
a. Remove the thermostat.
b. Remove the gasket from the thermostat.
4. INSTALL THERMOSTAT
a. Install a new gasket to the thermostat.
b. Insert the thermostat into the water inlet housing with the jiggle valve facing starlight upward.
HINT: The jiggle valve may be set within 30° of either side of the pre scribed position.
5. INSTALL WATER INLET
a. Install the water inlet with the 3 nuts.
Torque: 19 Nm (195 kgf-cm, 14 ft. lbs.)
6. REFILL ENGINE COOLANT