Toyota RAV4 Service Manual: Thermostat

Components

Removal

1. Remove no. 1 Engine under cover

2. Drain engine coolant (see page co-6)

3. Remove radiator support opening cover

4. Disconnect no. 2 Radiator hose

5. Remove water inlet

1. Remove the 2 nuts and disconnect the water inlet from the cylinder block.

6. Remove thermostat

1. Remove the gasket from the thermostat.

Inspection

1. Inspect thermostat

Hint:

The valve opening temperature is inscribed on the thermostat.

1. Immerse the thermostat in water, and then gradually heat the water.
2. Check the valve opening temperature of the thermostat.

Standard valve opening temperature: 80 to 84°c (176 to 183°f)

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

3. Check the valve lift.

Standard valve lift: 10 mm (0.39 In.) Or more at 95°c (203°f)

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

4. Check that the valve is fully closed when the thermostat is at low temperatures (below 77°c (171°f).

If it is not fully closed, replace the thermostat.

Installation

1. Install thermostat

1. Install a new gasket onto the thermostat.
2. Install the thermostat with the jiggle valve upward.

Hint:

The jiggle valve may be set to within 10° on either side of the prescribed position.

2. Install water inlet

1. Install the water inlet with the 2 nuts.

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

2. Connect no. 2 Radiator hose

3. Add engine coolant (see page co-6)

4. Check for engine coolant leaks (see page co-1)

5. Install radiator support opening cover

6. Install no. 1 Engine under cover