Skoda Felicia

since 1994 release

Repair and operation of the car

Skoda Felicia
+ Cars of the Skoda Felicia brand
+ Maintenance instruction
+ Routine maintenance
+ Repair of the engine
- Cooling systems, heating
   General information and precautionary measures
   Detachment and replacement of hoses of the cooling system
   Removal, check of a state and installation of a radiator
   Removal, check of serviceability of functioning and installation of the thermostat
   Check of serviceability of functioning, removal, installation, dismantling and assembly of the fan of the cooling system
   Check of serviceability of functioning, removal and installation of electric switches and sensors of the cooling system
   Removal, installation, dismantling and assembly of the water pump
   System of heating/ventilation of salon - the general information
   Removal and installation of components of system of heating/ventilation of salon
   The air conditioning system - the general information and precautionary measures
   Removal and installation of components of the air conditioning system
+ Power supply system
+ Engine electric equipment
+ Coupling
+ Transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body and finishing of salon
+ Onboard electric equipment

General information and precautionary measures

Scheme of the cooling system (carburetor engine of 1.3 l)

1 — the Radiator
2 — the Fan
3 — the Thermosensitive sensor switch
4 — the Final branch pipe
5 — the Water pump
6 — the Stopper
7 — the Exit from the inlet pipeline in the carburetor
8 — the Exit from the inlet pipeline in a heater
9 — the Exit from the carburetor
10 — the heater Heat exchanger

11 — a heater fan Electric motor
12 — the Inlet branch pipe inlet
13 — CTS
14 — the Thermostat
15 — the Broad tank
16 — the Cover of a broad tank
17 — the Drain stopper
18 — the Inlet branch pipe
19 — the Inlet branch pipe

On all models of cars of the considered brand the cooling system of the closed type working under pressure is used. Are a part of system the water pump which drive on models of 1.6 l is carried out from a gas-distributing belt, and on others - from auxiliary, the radiator of a cross and line design made of aluminum, the electric fan, the thermostat, the heater heat exchanger, and also all connecting fittings and electric switches. Cold cooling liquid from a radiator on the lower hose comes to the water pump which provides giving it in galleries of the block and a head of cylinders (and also to the heat exchanger of a heater of salon). After selection of heat from the surfaces of cylinders, combustion chambers and saddles of valves, cooling liquid reaches the lower part of the thermostat which in an initial state is closed. Further, cooling liquid passes through the heater heat exchanger then comes back to the water pump.

The function chart of the cooling system of the engine is submitted on an accompanying illustration. The cooling system functions as follows: the centrifugal water pump through the lower radiator hose is taken away cold by cooling liquid from the lower part of a radiator and under a pressure pumps over it through galleries of a water shirt of the block and a head of cylinders, and at the corresponding complete set also via the oil cooler heat exchanger. Having selected heat from cylinders, combustion chambers and saddles of valves, liquid gets to the lower part of the thermostat which valve at a stage of warming up of the engine remains buried, and then opens. Besides cooling of the engine, cooling liquid is used also for heating of interior of the car. For this purpose the path of the cooling system switched on the heater heat exchanger, passing through which, liquid comes back in the block of cylinders.

Until the engine got warm up to some certain temperature, cooling liquid continues to circulate on a short contour, passing only through the block and a head of cylinders, and also through the heater heat exchanger. As soon as temperature of the engine reaches the established value, there is an opening of the thermostat therefore the radiator is connected to a contour of circulation of liquid. In a radiator there is a convective return of heat from liquid to the running air stream which efficiency is defined by the developed area of edges of the heat exchanger of a radiator and speed of the air stream which is flowing round them. It is in case of need provided additional having blown in a radiator due to turning on of the electric fan of the cooling system. On reaching liquid of the lower cavity of a radiator, the cycle is repeated.

The electric fan which functioning the thermosensitive sensor switch of the cooling system operates is installed behind a radiator. As soon as temperature of cooling liquid reaches some established value, there is a turning on of the fan therefore having blown in the heat exchanger of a radiator increases that leads to increase in efficiency of a thermolysis.

Precautionary measures

In order to avoid a scalding, do not uncover a broad tank at all and do not disconnect any components of a cooling path at the hot engine. If there is a need for removal of a cover of a tank before full cooling of cooling liquid (such situations should be avoided whenever possible), it is necessary to dump previously excessive pressure in system. Wrap up a tank cover a thick layer of rags, then slowly turn off before emergence of hissing. When the hissing indicating release of steam stops, slowly turn off a cover up to the end. If at the last stage of an otvorachivaniye hissing is not resumed, can be uncovered. In the course of implementation of all procedure do not incline the person over a tank mouth, for protection of hands put on rubber gloves.

Try to avoid hit of antifreeze on open sites of skin and a paint and varnish covering of body panels. Casual splashes should be washed away immediately plentiful amount of clear water. Do not leave the merged from the engine or fresh cooling liquid stored in an open container at all. At once collect passage traces by rags. Remember that the sweetish smell of antifreeze is capable to draw attention of children and animals. Hit even of insignificant amount of cooling liquid in a digestive tract of a live organism is fraught with the most serious consequences, up to a lethal outcome.

Remember that at the hot engine the fan of the cooling system continues to function even after switching off of ignition - protect hands, try not to allow hits of hair or edges of clothes in contact with blades of a krylchatka.

Precautionary measures for the models equipped with the air conditioning system are listed in the Section Air conditioning system - the general information and precautionary measures.