Opel Astra A

1991-1998 of release

Repair and operation of the car



Opel Astra A
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
- 4. Ventilation and heating
   - 4.1. Cooling system
      4.1.1. Technical characteristics
      4.1.2. Discharge of cooling liquid
      4.1.3. Washing of the cooling system
      4.1.4. Gulf of cooling liquid
      4.1.5. Cooling system hoses
      4.1.6. Radiator
      4.1.7. Broad tank
      4.1.8. Thermostat
      + 4.1.9. Cooling fan
      4.1.10. Sensor of temperature of cooling liquid
      4.1.11. Sensor of level of cooling liquid
      4.1.12. Water pump
   + 4.2. System of heating and ventilation
+ 5. Power supply system
+ 6. System of decrease in toxicity
+ 7. Coupling
+ 8. Transmissions
+ 9. Half shafts
+ 10. Brake system
+ 11. Suspension bracket and steering
+ 12. Body
+ 13. Electric equipment
+ 14. Electrical circuitries







4.1.8. Thermostat

THE SOHC MODELS WITH THE 1,4 AND 1,6 L ENGINE

Removal and installation

PERFORMANCE ORDER
1. Merge cooling liquid.
2. Remove a back cover of a gas-distributing belt.
3. Turn off and remove two fixing bolts of a casing of the thermostat and remove a casing.
4. Disconnect a water hose from a casing.
5. Remove the thermostat from a head of the block of cylinders.
6. Remove a sealing ring from below of the thermostat.
7. Installation is carried out upside-down removals.

THE SOHC MODELS WITH THE 1,8 AND 2,0 L ENGINE, AND ALSO ALL DOHC MODELS

Removal and installation

PERFORMANCE ORDER
1. Merge cooling liquid.
2. Disconnect the top hose of a radiator from a thermostat cover.
3. Turn off three fixing bolts of a cover of the thermostat and uncover together with the thermostat (a photo at the left). Remove a sealing ring (a photo on the right).
4. If the thermostat needs to be replaced, replace it together with a cover.
5. Installation is carried out upside-down removals.

Check

PERFORMANCE ORDER
1. For check of the thermostat lower it in water. Heat water to boiling and check that the thermostat opened at water boiling up.
2. For more exact check the thermostat use the thermometer (the drawing of a slkv). Temperature of opening of the thermostat is specified on its case (a photo on the right).
3. If the thermostat is not closed, it needs also to be replaced.