Car thermostat (Renault Espace I)

1. On illustrations 2.4 the location of the thermostat is indicated by the letter "T".

2. To remove this component, drain the coolant (see Chapter 2) and disconnect the coolant supply hose from the branch pipe. Remove the thermostat housing from the cylinder head and take out the thermostat. Before removing, apply installation marks to the thermostat.

3. The thermostat cannot be repaired and if damaged it must be replaced. Perform a simple check:

4. Hang the thermostat on a wire and place it in a container with cold water.

5. Hang a thermometer nearby.

6. Gradually heat the water and check if the main thermostat valve opens. This should happen at a temperature of about 81°C (4-cylinder engine) and accordingly at a temperature of 85°C (v6 engine).

(Text provided by an online resource RenaultBook)

10. At a temperature of approximately 93°C the valve should open fully. During this test the thermostat valve should extend out of the thermostat by at least 7.5 mm.

11. If the thermostat does not operate as described, replace it.

12. When installing the thermostat, use a new sealing gasket. Apply sealant to the gasket. Before putting on the clamps, carefully inspect them.

13. Fill with coolant (see Chapter 2).

14. Let the engine run to check if it warms up.