Subaru Legacy

since 1990-1998 release

Repair and operation of the car



Subaru Legacy
+ 1.1. Identification numbers
+ 2. Maintenance
+ 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 replacement of the thermostat
      4.1.5. Check and replacement of the fan of a radiator and relay
      4.1.6. Radiator
      4.1.7. Broad tank
      4.1.8. Water pump
      4.1.9. Sensor of temperature of cooling liquid
   + 4.2. System of heating
   + 4.3. Air conditioning system
   4.4. System of climate control
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Systems of start, ignition
+ 8. Transmissions
+ 9. Coupling, shaft
+ 10. Brake system
+ 11. Suspension bracket
+ 12. Steering
+ 13. Body
+ 14. Electric equipment






4.1.4. Check and replacement of the thermostat

GENERAL INFORMATION

The thermostat is located on a forward part of the engine under the water pump (cm. rice. Water pump, rice. Water pump of the engine 1,8 l).

Check

PERFORMANCE ORDER
1. With defects in the cooling system check the level of cooling liquid and operability of the index of temperature.
2. If after start the engine gets warm very slowly, then, perhaps, the thermostat is in constantly open situation, and it needs to be replaced.
3. If the engine overheats, then a hand check temperature of the top hose of a radiator. If the hose cold, then, perhaps, the thermostat is in a closed position and does not pass cooling liquid to a radiator. In this case the thermostat is also subject to replacement.
4. If the thermostat is in open situation at the room temperature, then it is subject to replacement.
5. For check of the thermostat lower it on a twine in a container with water. Gradually heating water, notice temperature at which the thermostat begins to open and completely will open. Take the thermostat from water and check that it was completely closed after cooling. Replace the thermostat if its parameters differ from technical requirements.

Replacement


Prevention

When opening a cover of a broad tank on the hot engine it is necessary to be careful as the coming-out vapors can lead to severe burns.


PERFORMANCE ORDER
1. Lift a forward part of the car and record on supports.
2. Merge cooling liquid from the cooling system.
3. Install the corresponding container under a thermostat casing. Weaken a collar and remove a radiator hose from a thermostat casing.
4. Unscrew bolts (are specified by shooters) and uncover a thermostat casing.
5. Remove the thermostat, noting situation in which it was located (it is specified by shooters).
6. Check operability of the thermostat.
7. Clear the interfaced surfaces of the thermostat, a casing of the thermostat and a cover of a casing of the thermostat.
8. Install the thermostat with new laying in a thermostat casing. Check that the ledge of the thermostat was as appropriate combined with a groove in a thermostat casing.
9. Establish a casing of the thermostat and fix it by bolts.
10. Establish a radiator hose on a cover of a casing of the thermostat and fix by a collar.
11. Fill in cooling liquid in the engine cooling system.