Mazda 626

1991-1998 of release

Repair and operation of the car

Mazda 626

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
- 4. Heating and ventilation
   4.1. Introduction
   4.2. Technical characteristics
   4.3. Thermostat
   4.4. The cooling fans
   4.5. Radiator and broad tank
   4.6. Water pump
   4.7. Sensor of temperature of cooling liquid
   4.8. Oil heater of the engine (6-cylinder models)
   4.9. Electric chain of the motor of the delivery fan
   4.10. Motor of the delivery fan
   4.11. Control unit of a heater and air conditioner
   4.12. Heater radiator
   + 4.13. Systems of air conditioning and heating
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electrical circuitries
+ 14. Useful tips

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4. Heating and ventilation

4.1. Introduction


Elements of the cooling system of the engine and sitema of air conditioning

1. Radiator
2. Refrigerator
3. The cooling fans of a radiator and the refrigerator
4. Compressor of the air conditioning system
5. Water pump
6. Broad tank
7. Thermostat casing
8. Moisture separator of the air conditioner


1. Flange

2. Piston

3. Valve

4. Main spring

5. Valve saddle

6. Basis

7. Valve

8. Additional spring

Check of a condition of cooling liquid

For check of a condition of cooling liquid you can use an inexpensive hydrometer.

Engine cooling system

The cooling system of the engine is under pressure, circulation of cooling liquid is controlled by the thermostat. Circulation of cooling liquid is provided with the water pump located in a forward part of the block of cylinders.

The casing of the thermostat is located near a radiator in four-cylinder engines and in the top back part of the engine in six-cylinder models.

While the engine is warmed, the thermostat is in the closed state and cooling liquid does not get to a radiator. When the engine gets warm up to the normal working temperature, the thermostat opens, and cooling liquid begins to circulate through a radiator.

Heating system

The heating system consists of the forcing fan and a radiator of a heater which is connected to the engine and through which hot cooling liquid of the engine circulates.

Air conditioning system

The air conditioning system consists of the refrigerator fixed before a radiator of the engine, evaporator close to a radiator of a heater, the compressor fixed on the engine, a moisture separator which the reducing valve of high pressure and the tubes connecting above-mentioned knots is built in.

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