Thermostat assembly (engines 2.0 l / 2.4 l).
1 - upper radiator hose, 2 - cooling system inlet pipe, 3 - gasket, 4 - thermostat.
Thermostat assembly (engine 2.7 l).
1 - radiator hoses, 2 - cooling system outlet pipe, 3 - thermostat, 4 - coolant temperature sensor, 5 - cooling system hose.
Removal and installation
1. Drain the coolant so that its level is below the thermostat.
2. Remove the cooling system inlet pipe and gasket.
3. Remove the thermostat.
4. If necessary, remove the coolant temperature sensor.
5. Install the coolant temperature sensor. Apply sealant to the threads of the sensor before installation.
- Tightening torque: 20-40 Nm
6. Install thermostat. Check that the thermostat is correctly installed in the housing and that its flange fits snugly against the housing at the installation location.
7. Install the coolant inlet pipe with a new gasket and tighten it.
Torque:
- Engines 2.0L / 2.4L: 10-15 Nm
- Engine 2.7 l: 17-20 Nm
Engines 2.0 l / 2.4 l. | Engine 2.7 l. |
8. Fill the cooling system with clean coolant.
Examination
1. Check that the thermostat valve is tightly closed at room temperature (20°C).
2. Check the thermostat for defects or damage. If there are various deformations, visible damage or other defects, then replace the thermostat.
3. Check for rust or deposits on the thermostat valve. If rust or deposits are found, clean the valve.
4. Checking the operation of the thermostat.
- A) Immerse the thermostat in a container of coolant or water and heat the water while stirring it.
- b) Check that the temperature at which the valve starts to open and the temperature at which the valve fully opens are within the specified values.
Temperature:
- start of valve opening: 80-84°С
- full valve opening: 95°С
- V) Even if the thermostat valve opens at a temperature that is slightly below the nominal value, replace the thermostat.
Attention: there are marks on the thermostat housing indicating the temperature at which the valve starts to open. When replacing, use a thermostat with the same label.