Cooling and heating system Mazda 626 (3 and 4)

General information about the engine cooling system
The cooling system consists of a radiator, a crankshaft driven water pump and a thermostat. The system is filled with coolant. A fan with an electric motor is installed...

General information about antifreeze
Attention! Do not allow antifreeze to come into contact with exposed skin or vehicle paintwork. In case of contact with antifreeze, flush the affected areas with plenty...

Thermostat — replacement and check
Attention! Replace the thermostat on a cold engine. In addition, when carrying out any work near the fan, to prevent its arbitrary activation, it is necessary to...

Radiator — removal, maintenance and repair
The radiator is used to cool the liquid with a stream of air passing through the core of the radiator. The radiator core consists of aluminum tubes and aluminum cooling...

Radiator fan — removal, inspection and installation
Removal and installation For easier access, remove the ignition distributor and air cleaner intake pipe. Disconnect the connector from the motor thermal switch. Drain...

Radiator fan motor
When checking the wires of the electric motor power circuit, find the connector and disconnect it with a screwdriver. Pic. 5.5. Connection diagram for checking the...

Radiator Fan Intermediate Relay
Disconnect the connector from the thermal switch and check that the radiator fan turns on when the key in the ignition switch is turned to «ON». If the fan turns on,...

Thermal switch — check and replacement
Drain the liquid from the cooling system to a level corresponding to the lower edge of the thermostat housing. Disconnect the connector and remove the thermal switch....

Water pump — check, removal and installation
Examination A faulty water pump can cause the engine to overheat and fail (the engine is not cooled by the circulating coolant flow). The performance of the water pump...

Heater fan motor — removal and installation
Removing Disconnect the wire from the negative battery terminal. For easier access to the heater motor, remove the lower trim from the instrument panel on the front...

Air conditioning service
Attention! Work on the air conditioning system must be carried out by specially trained qualified personnel. Attention! The air conditioning system is under high...

Check, removal and installation of the coolant temperature sensor (since 1984)
Remove the rubber boot from the connector on the coolant temperature sensor. Start the engine and warm it up to normal operating temperature, then leave it to idle....