 printable version
Thermostat
| Fig. 468. The coolant pump 1 - a bolt, 20 Nm; 2 - the coolant pump; 3 - bolt 10 Nm; 4 - bolt 10 Nm; 5 - the coolant temperature sensor, 7 Nm; 6 - thermostat; 7 - bolt 10 Nm; A - is attached to the cylinder head; B - to the heat exchanger; C - the radiator heater; D - from the radiator
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The thermostat controls the redistribution of coolant flow in the cooling system of the engine. The thermostat is disposed in the housing for the water pump cover, which has a sealing ring (see. Fig. 468). The procedure for removing the thermostat (work carried out on the cold engine): - Drain the coolant from the cooling system; - Disconnect the feed hose; - Remove the cover of the thermostat; - Remove the thermostat with a sealing ring.
Note For easy access to the thermostat lift the front of the car and establish it on support. |
The thermostat can not be repaired, so in case of malfunction, replace it. A simple checking of the thermostat is carried out as follows:
| Fig. 192. Verifying thermostat
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- Suspend the thermostat on the wire and place it in the container with cold water (see. Fig. 192); - Hang a thermometer (temperature measurement with an interval of at least 10-120 ?� C) so that it does not touch the bottom of the vessel; - Heat the water. Check out: 1) if the thermostat begins to open at a temperature of 85 ?� C; 2) at a temperature of 105 ?� C thermostat should be fully open; 3) The pin must move out of the thermostat housing at least 7 mm. If the thermostat does not stand this test, then it must be replaced. When installing the thermostat, use a new gasket. Check the hose clamp before you install it again on the hose. Fill in cooling liquid in cooling system, as described in Sec. 19.1.1.
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