Fig. 468. The pump of cooling liquid: 1 — a bolt, 20 N · m; 2 — the pump of cooling liquid; 3 — a bolt, 10 N · m; 4 — a bolt, 10 N · m; 5 — the sensor of temperature of cooling liquid, 7 N · m; 6 — the thermostat; 7 — a bolt, 10 N · m; A — is attached to a head of the block of cylinders; B — to the heat exchanger; C — to a heater radiator; D — from a radiator

The thermostat operates redistribution of streams of cooling liquid in system of cooling of the engine. The thermostat is located in the case of the water pump under a cover which has a sealing ring (see fig. 468 ).

Order of removal of the thermostat (works are carried out on the cold engine):

- merge cooling liquid from cooling system;

- disconnect bringing hose;

- uncover the thermostat;

- remove the thermostat with a sealing ring.

Note For convenience of access to the thermostat lift a forward part of the car and establish it on support.

The thermostat is not subject to repair therefore in case of malfunction replace it. Simple check of operability of the thermostat is carried out as follows:

Fig. 192. Check of operability of the thermostat

- suspend the thermostat on a wire and lower it in a vessel with cold water (see fig. 192 );

- suspend the thermometer (with an interval of measurement of temperature not less than 10-120 ° C) so that it did not concern a vessel bottom;

- heat up water.

Check:

1) whether will start the thermostat to open at temperature 85 ° C;

2) at temperature 105 ° the C thermostat should open completely;

3) the pin of the thermostat should be put forward from the case at least on 7 mm.

If the thermostat does not maintain this check, it is necessary to replace it.

At installation of the thermostat use new laying. Check a hose collar before again it to establish on a hose. Fill in cooling liquid in cooling system as it was described in item 19.1.1.