Removing the thermostat
Disconnect the ground cable from the battery.
Partially drain the cooling system.
Disconnect the elastic hoses from the thermostat housing (Fig. 2.94).
Remove the fan thermal switch.
Unscrew the cover and remove the thermostat (Fig. 2.95).
Checking the thermostat operation
Hang the thermostat in a container of water.
Heat the water and check its temperature with a thermometer.
At a temperature of 85°-89°C the thermostat should begin to open.
At a temperature of 98°-102°C the thermostat should be fully open (Fig. 2.96).
The thermostat cannot be repaired and if it is damaged it must be replaced with a new one.
Installing a thermostat
The thermostat is installed in the reverse order. In this case, it is necessary to use new gaskets and strictly adhere to the recommended tightening torques of the bolts.
Fill the system with coolant, pouring it gradually through the expansion tank. After starting, warm up the engine to normal temperature. The upper hose of the cooling system should be hot.
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