Subaru Legacy

Since 1990-1998 of release

Repair and car operation

Subaru Legasi
+ 1.1. Identification numbers
+ 2. Maintenance service
+ 3. Engines
- 4. Heating, ventilation
   - 4.1. Cooling system
      4.1.1. Introduction
      4.1.2. Technical characteristics
      4.1.3. Antifreeze
      4.1.4. Check and thermostat replacement
      4.1.5. Check and replacement of the fan of a radiator and the relay
      4.1.6. A radiator
      4.1.7. A broad tank
      4.1.8. The water pump
      4.1.9. The gauge of temperature of a cooling liquid
   + 4.2. Heating system
   + 4.3. Air central air
   4.4. Climate control system
+ 5. Fuel system
+ 6. An exhaust system
+ 7. Systems of start, ignition
+ 8. Transmissions
+ 9. Coupling, shaft
+ 10. Brake system
+ 11. A suspension bracket
+ 12. A steering
+ 13. A body
+ 14. An electric equipment

4.1.4. Check and thermostat replacement

The thermostat is located on a forward part of the engine under the water pump (cм. Fig. the Water pump, fig. the Water pump of the engine 1,8).


1. In the presence of defects in cooling system check up level of a cooling liquid and working capacity of the index of temperature.
2. If after start the engine gets warm very slowly, that, probably, the thermostat is in constantly open position, and it is necessary to replace it.
3. If the engine overheats, a hand check up temperature of the top hose of a radiator. If the hose cold, that, probably, the thermostat is in the closed position and does not pass cooling liquid to a radiator. In this case the thermostat also is subject to replacement.
4. If the thermostat is in open position at a room temperature it is subject to replacement.
5. For thermostat check lower it on a twine in the container with water. Gradually heating up water, notice temperature at which the thermostat starts to open and completely will open. Take the thermostat from water and check up, that it was completely closed after cooling. Replace the thermostat if its parametres differ from technical requirements.


The prevention

At opening of a cover of a broad tank on the hot engine it is necessary to be careful, as leaving steams can lead to strong burns.

1. Lift a forward part of the car and fix on supports.
2. Merge cooling liquid from cooling system.
3. Establish the corresponding container under a thermostat casing. Ослабьте a collar also remove a hose of a radiator from a thermostat casing.
4. Unscrew bolts (are specified by arrows) and uncover a thermostat casing.
5. Remove the thermostat, marking position in which it has been located (it it is specified by arrows).
6. Check up working capacity of the thermostat.
7. Clear interfaced surfaces of the thermostat, a casing of the thermostat and a cover of a casing of the thermostat.
8. Establish the thermostat with a new lining in a thermostat casing. Check up that the thermostat ledge in appropriate way was combined with a groove in a thermostat casing.
9. Establish a casing of the thermostat and fix its bolts.
10. Establish a radiator hose on a cover of a casing of the thermostat and fix a collar.
11. Fill in cooling liquid in system of cooling of the engine.