Citroën Xantia

since 1993 release

Repair and operation of the car



Citroën Xantia
+ Introduction
+ Operation manual
+ Routine maintenance
+ Repair of the engine
- Cooling systems, heating
   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 and installation of the fan(s) of the cooling system
   Check of serviceability of functioning, removal and installation of electric switches and sensors of the cooling system
   Removal and installation of the water pump
   Removal and installation of a casing of the thermostat / fuel filter (diesel models)
   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 and release
+ Engine electric equipment
+ Coupling
+ Transmission
+ Power shafts
+ Uniform hydraulic system
+ Brake system
+ Running gear and steering
+ Body and finishing of salon
+ Onboard electric equipment
+ Schemes of electric equipment


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Cooling systems, heating

Specifications

General parameters

The maximum admissible pressure in system, bar

1.4

Thermostat

Opening temperature

°C

Beginning of opening

   •  Models with RKPP

89

   •  Models with AT

83

Full opening

99

Temperature of operation of a thermoswitch

118 °C

Pressure of opening of the valve of a cover of a radiator, bar

1.4

Efforts of tightening of threaded connections, Nanometer

Bolts of fastening of the water pump

15

Sensors switches

18

General information and precautionary measures

General information

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 is carried out from a gas-distributing belt, a radiator of a cross and line design (on some models with the built-in broad tank), the electric fan(s), the thermostat, and also a set of connecting hoses and sensors 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 in the heat exchanger of a heater of salon), and, - at the corresponding complete set, - to the oil cooler(s). 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, via the block of cylinders, comes back to the water pump.

Until the engine got warm up to some certain temperature, cooling liquid continues to circulate on a short contour, passing through a block/head of cylinders and the heat exchanger of a heater. As soon as temperature of the engine reaches some 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 running stream. It is in case of need provided additional having blown in a radiator due to turning on of the electric fan(s) of the cooling system. Leaving a radiator, the cooled liquid repeats the running cycle.

When temperature of the engine reaches normal working value, excess of cooling liquid, образовывающийся due to its thermal expansion, is forced out in a broad tank, from where, in process of cooling, comes back to the working highway of system.

On models with AT a part of the cooling liquid which is coming out the lower hose of a radiator is passed through ATF cooler established on transmission. On the models equipped with the oil cooler, liquid is passed as well via the heat exchanger of the last.

The electric fan(s) which functioning the thermosensitive sensor switch of the cooling system operates is installed ahead of 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.

Function charts of several types of contours of the cooling system of the considered models of engines installed on cars are given in illustrations.


Contour of the cooling system of petrol XU7, XU5, XU10 J2 and XU10 J4 engines of models with RKPP (with the broad tank which is built in a radiator)

1 — Gates for removal of air
2 — the Sensor of temperature (cooling system)
3 — the Thermosensitive sensor switch (it is connected to the thermometer on the dashboard and opens a safety contour at an engine overheat [118 °C])
4 — temperature Sensor (system of injection)
5 — a liquid Stream to the heat exchanger of a heater and back

6 — the Stream of cooling liquid from the heater heat exchanger
7 — the Broad tank
8 — the Radiator with the fan
9 — the Thermostat
10 — the heater Heat exchanger


Contour of the cooling system of petrol XU10 J2 engines of models with AT (with a separate broad tank)
It is used also on XU7 and XU10 J2 engines of models from RKPP equipped with system of climate control.

1 — Gates for removal of air
2 — the Sensor of temperature (cooling system)
3 — the Thermosensitive sensor switch (it is connected to the thermometer on the dashboard and opens a safety contour at an engine overheat [118 °C])
4 — temperature Sensor (system of injection)
5 — a liquid Stream to the heat exchanger of a heater and back
6 — the Stream of cooling liquid from the heater heat exchanger

7 — the Broad tank
8 — the Radiator with the fan
9 — the Thermostat
10 — the Stream from the oil cooler heat exchanger
11 — the Stream to the oil cooler heat exchanger
12 — the oil cooler Heat exchanger
13 — the heater Heat exchanger


Contour of the cooling system of petrol XU10 J4 engines (16 valves) of models with RKPP (with the broad tank which is built in a radiator)

1 — Gates for removal of air
2 — the Sensor of temperature (cooling system)
3 — the Thermosensitive sensor switch (it is connected to the thermometer on the dashboard and opens a safety contour at an engine overheat [118 °C])
4 — temperature Sensor (system of injection)
5 — the heater Heat exchanger

6 — a liquid Stream to the heat exchanger of a heater and back
7 — the Stream of cooling liquid from the heater heat exchanger
8 — the Thermostat
9 — the Broad tank
10 — the Radiator with the fan
11 — the oil cooler Heat exchanger


Contour of the cooling system of diesel engines with the broad tank which is built in a radiator

1 — Gates for removal of air
2 — the Drain gate
3 — the Sensor of temperature (cooling system)
4 — temperature Sensor (the adjusting BITRON device)

5 — the Sensor of temperature (power supply system)
6 — the Thermosensitive sensor switch of the fan of the cooling system
7 — the Thermostat
8 — the Broad tank


Contour of the cooling system of diesel engines with a separate broad tank

1 — Gates for removal of air
2 — the Drain gate
3 — the Sensor of temperature (cooling system)
4 — temperature Sensor (the adjusting BITRON device)

5 — the Sensor of temperature (power supply system)
6 — the Thermosensitive sensor switch of the fan of the cooling system
7 — the Thermostat
8 — the Broad tank

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 broad tank before full cooling of cooling liquid, (though 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 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 the spilled liquid 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 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.


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