Toyota Sienna Quiz
Engine

Inspection

In this manual: Engine
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
~1min read

1. INSPECT THERMOSTAT

(a) Inspect the thermostat.

INSPECT THERMOSTAT

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

INSPECT THERMOSTAT

(b) Immerse the thermostat in water and gradually heat the water.

(c) Check the valve opening temperature.

Valve opening temperature: 80 to 84 °C If the valve opening temperature is not as specified, replace the thermostat.

INSPECT THERMOSTAT

(d) Check the valve lift.

Valve lift: 7.7 mm (0.303 in.) or more at 95 °C If the valve lift is not as specified, replace the thermostat.

(e) Check that the valve is fully closed when the thermostat is at low temperatures (below 40 °C).

If it is not fully closed, replace the thermostat.

Test yourself

A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.