5.13.6. Removal and thermostat installation

Need for replacement of the thermostat can arise at an unstable temperature mode of the engine: overheat or insufficient warming up.

For thermostat check on the car start up the cold engine and touch a hand the top (bringing) hose of a radiator — it should be cold. After the temperature of cooling liquid will reach 85–89 °C, the hose should start to heat up quickly that specifies for the beginning of circulation of liquid on a big contour. If it does not occur, remove the thermostat and check its working capacity.

It be required to you: a key «on 10», пассатижи with changeable capture.

1. Disconnect a wire from the minus plug of the storage battery.

2. Merge liquid from system of cooling of the engine (see. «Replacement of cooling liquid»).

3. Weaken a collar of fastening of a parootvodyashchy hose to a branch pipe of the case of the thermostat, having compressed пассатижами its unbent ears, shift a collar on a hose...	4.... also disconnect a hose from a branch pipe.

5. Weaken a collar of fastening of a taking-away hose to a branch pipe of the case of the thermostat, having compressed пассатижами its unbent ears, shift a collar on a hose...	6.... also disconnect a hose from a branch pipe of the case of the thermostat.

7. Weaken a collar of fastening of a hose of a heater to a branch pipe of the case of the thermostat, having compressed пассатижами its unbent ears, shift a collar on a hose...	8.... also disconnect a hose from a branch pipe of the case of the thermostat.

9. Compress a clamp...	10.... also disconnect a block of a plait of wires from the sensor of temperature of cooling liquid.

11. Turn out three bolts of fastening of the case of the thermostat to a head of the block of cylinders...	12.... also remove the thermostat case.

13. Take out a lock ring from a flute of the case of the thermostat...	14.... also remove a lock ring.

15. Take out from the case the thermostat...	16.... and rubber sealing ring. Examine a sealing ring. Strongly pressed out, hardened or torn ring replace.

Note So the thermostat removed from the car looks. Pay attention to its marking that at replacement to get same.

17. For check lower the thermostat in capacity with the water which has been warmed up to 78–80 °C. Gradually heating up water, watch temperature of the beginning of opening of the valve of the thermostat.

Note The thermostat of system of cooling is considered serviceable under following conditions: – temperature of the beginning of opening of the valve – 85–89 °C; – temperature of complete opening of the valve – 99–102 °C.

18. Clear a privalochny surface of a head of the block of cylinders and a flange of the case of the thermostat of the laying remains.

Good advice Before installation of the case of the thermostat put a hermetic layer on a privalochny surface of a head of the block of cylinders and on a flange of the case of the thermostat.

19. Establish the removed details as it should be, the return to removal.

20. Fill in cooling liquid and remove from cooling system air jams (see. «Replacement of cooling liquid»).