Inspect Thermostat

HINT:

The thermostat is numbered with the valve opening temperature.

2006 ENGINE Cooling - Sequoia

Thermostat Opening Temperature
Fig. 16: Identifying Temperature Mark On Thermostat Assembly Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Immerse the thermostat in water and gradually heat the water.

b. Check the valve opening temperature.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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