Toyota Tundra. Manual — part 1669

5. REMOVE WATER INLET WITH THERMOSTAT

HINT:

If the thermostat was not installed, cooling efficiency would decrease. Even if the engine tends to
overheat, do not remove the thermostat.

a. Remove the 3 nuts, water inlet with thermostat and gasket.

Fig. 26: Identifying Water Inlet Nuts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION

1. INSPECT WATER INLET WITH THERMOSTAT

HINT:

The valve opening temperature is inscribed on the thermostat.

Fig. 27: Identifying Valve Opening Temperature Is Inscribed On Thermostat
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Immerse the thermostat in water, then gradually heat the water.

b. Check the valve opening temperature of the thermostat.

Standard valve opening temperature: 80 to 84°C(176 to 183°F)

2009 Toyota Tundra

2009 ENGINE Cooling (1GR-FE) - Tundra

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

Fig. 28: Checking Valve Opening Temperature Of Thermostat
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Check the valve lift.

Standard valve lift: 8.0 mm (0.315 in.) or more at 95°C (203°F)

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

Fig. 29: Checking Valve Lift
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d. Check that the valve is fully closed when the thermostat is at a low temperature (below 40°C

If not fully closed, replace the thermostat.

INSTALLATION

1. INSTALL WATER INLET WITH THERMOSTAT

a. Install a new gasket and the water inlet with thermostat with the 3 nuts.

Torque: 9.0 N*m (92 kgf*cm, 80 in.*lbf)

2009 Toyota Tundra

2009 ENGINE Cooling (1GR-FE) - Tundra

Fig. 30: Identifying Water Inlet Nuts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. CONNECT RADIATOR HOSE OUTLET

3. ADD ENGINE COOLANT (see REPLACEMENT )

4. INSPECT FOR ENGINE COOLANT LEAK (see ON-VEHICLE INSPECTION )

5. INSTALL V-BANK COVER (See INSTALLATION )

6. INSTALL NO. 1 ENGINE UNDER COVER (See INSTALLATION )

FAN

COMPONENTS

2009 Toyota Tundra

2009 ENGINE Cooling (1GR-FE) - Tundra

Fig. 31: Identifying Fan Components With Torque Specifications (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ENGINE Cooling (1GR-FE) - Tundra