Mazda 626

1991-1998 of release

Repair and car operation

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. Cooling fans
   4.5. Radiator and broad tank
   4.6. Water pump
   4.7. The sensor of temperature of cooling liquid
   4.8. Oil radiator 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 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 semi-axes
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electroschemes
+ 14. Good advice

4. Heating and ventilation

4.1. Introduction


Elements of system of cooling of the engine and ситемы air conditionings

1. Radiator
2. Refrigerator
3. Cooling fans of a radiator and the refrigerator
4. Compressor of central air of air
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.

System of cooling of the engine

The system of cooling of the engine is under pressure, circulation of cooling liquid is supervised 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 up, the thermostat is in the closed condition and cooling liquid does not get to a radiator. When the engine gets warm to normal working temperature, the thermostat opens, and cooling liquid starts 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 central air

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