Audi A4

Since 1994 of release

Repair and car operation

Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
- Cooling system
   So there is a cooling
   Check of level of a cooling liquid
   Antifreeze check
   Check of system of cooling on tightness
   Zapornaja cover of system of cooling
   The thermostat
   The help at malfunctions
   The water pump
   Klinovoj belt of the water pump
   Various models of fans
   The vjazkostnyj fan
   The fan of a radiator with the electric drive
   Infringements in work of the fan of a radiator
   The help at malfunctions
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics


The radiator represents the tank from a synthetic material which is supplied by edges with right and a left-hand side. From this collector the cooling liquid flows on tubes of a radiator from easy metal which for increase in the surface (and, hence, a cooling surface) are supplied by cooling edges. Through cooling edges the cooling liquid can give warmth to environment.

If it is suspected негерметичность a radiator it is necessary to conduct the described test by pressure in a workshop. At obvious defect you also can dismantle at once a radiator and send it in repair. There are special workshops on repair of radiators (the branch telephone directory) which carry out such repair or offer radiators on replacement.

Radiator dismantle

For radiator dismantle it is necessary to deblock by means of both screw-drivers of the fixing screw (1) on a forward part of the car and to take out them from fixing apertures (2).

We do not advise to you to be engaged демонтажем a radiator in the car with an automatic transmission. Thus it is necessary to disconnect tubes of an oil radiator with ATF, integrated in a radiator that then involves problem filling of transmission ATF. Besides, the dirt should not get to system of circulation ATF. Further you will find the description of dismantle of a radiator for cars with a mechanical transmission.


  1. Dismantle a forward bumper (the head of the Detail of a body).
  2. Merge in capacity cooling liquid.
  3. Disconnect hoses from a radiator; the thick hose below from outside can be removed the driver, having wrung out metal скобу in connecting knot of a hose.
  4. There, where it is necessary, dismantle an air line on right or a radiator left-hand side.
  5. Disconnect, if is (the strengthened cooling, climatic installation), sockets of wires on the switch of the thermostat of the fan of a radiator, and also sockets on the radiator fan.
  6. Deblock by means of a small screw-driver a fixing bolt of a radiator above on a forward part of the car and remove it.
  7. Take out forward an intermediate rubber support.
  8. Pull forward a radiator for an upper edge and remove upwards from the bottom fixing pins.

Radiator cleaning

Till the summer period of an edge of a radiator should be cleared of the corpses who have stuck to it of insects, the cooling effect differently worsens.


  1. Сбрызните the dried rests of insects the means dissolving fiber.
  2. After a while смойте means from a radiator underside. Start up through radiator plates not too strong stream. The rigid brush or the sharp tool can damage radiator plates.
  3. Insert a water hose into an aperture round the radiator fan. There, where is, in addition lift air заслонку on an underside of a radiator and water through the apertures located behind it.

Dismantle of hoses of giving of a cooling liquid

At the left: in the car with the six-cylinder engine there is an additional carving stopper (arrow) plum of a cooling liquid which is below at the engine near to a dividing seam with картером.

On the right: the carving stopper of a drain aperture (2) ahead on the right at a radiator, unfortunately, is accessible only at the dismantled bumper. Sometimes in cars with the electric fan of a radiator (the strengthened cooling) the thermoswitch (1) cooling liquids is built in.

At the left: to remove air from cooling system, it is necessary to shift after collar easing a hose (3) heatings on a connecting tube (1) so that the ventilating aperture (2) was bared. It is possible when the aperture in a tube coincides with an aperture in a hose.

On the right: at the six-cylinder engine for removal of air from cooling system it is necessary to open in addition a bolt with internal шестигранником (marksman) at the left below on a tube of a cooling liquid.


  1. Get as spare parts original hoses of the necessary bent form and new collars.
  2. Merge and collect cooling liquid.
  3. Loosen the screw collars a screw-driver.
  4. Spring collars of hoses compress nippers for "ears" against the stop.
  5. In some models the thick hose at the left below on a radiator is fixed metal скобой in connecting knot of a hose.
  6. Wring out metal скобу.
  7. Remove hoses.
  8. Strongly sitting ends of hoses ослабьте a screw-driver, having inserted it between a hose and a branch pipe and then cautiously having wrung out.
  9. Pull far enough new hoses over branch pipes so that they could not slide off again.
  10. Do not tighten with force screw collars, the carving differently will break.
  11. The hose fixed metal скобой: check up a sealing ring, pull connecting knot of a hose before occurrence in a groove metal скобы.

 Council: it is seldom possible to replace the water hose Broken off or bitten through by rodents at once as often the necessary water hose is not present in a pantry. The gluing tape for repair of system of cooling can temporarily help. It is well pasted on the cleared and dry rubber hoses. At the big leak can help if to open a radiator cover on one turn that in cooling system pressure which the bandage cannot resist has gone down. Only now it is cautious поезжайте in a workshop. Do not lose sight of the gauge of temperature and level of a cooling liquid!

Plums of cooling means


  1. Allow to cool down to the engine, at the hot engine there is a danger of a burn!
  2. Open запорную a cover of a broad tank.
  3. Dismantle the bottom facing of an impellent compartment (the head of the Detail of a body).
  4. Substitute under the engine a wide tray for reception of a cooling liquid.
  5. Remove the bottom water hose on a radiator. In addition:
  • The four-cylinder engine: in the direction of travel at the left on the engine remove a thick hose to a radiator and more thin hose to the heating heat exchanger, and also on the case of the thermostat and merge a liquid.
  • The six-cylinder engine: merge cooling liquid, having unscrewed below on the engine block a carving stopper of a drain aperture.

 Council: Antifreeze is poisonous, therefore it cannot be merged simply in the water drain. Instead pour out it in a separate vessel and send in спецотходы (find out where there is a reception point in local administration).

Filling of system of cooling with a new cooling liquid

Gulf of a new cooling liquid: delay a heating hose on the connected tube so that the ventilating aperture (1) became visible. Then put on a jellied branch pipe of a broad tank a piece of a hose in length of 10 sm (2) to increase height of its filling.

As in the engine there is a certain quantity of a cooling liquid all that quantity of a liquid specified in the table in the beginning of the head, maybe, is not required.


  1. Before filling open a collar of a water hose to heating and shift it back so that the ventilating aperture was bared.
  2. The six-cylinder engine: open the air screw in a tube of a cooling liquid under a broad tank.
  3. Put on a branch pipe of a jellied aperture a piece of a hose in length of 10 sm (diameter about 42 mm) to increase gulf height.
  4. In the beginning fill in antifreeze, then, whenever possible, the distilled water so that liquid level reached an upper edge of a broad tank.
  5. Only for the six-cylinder engine: fill in a liquid until it will not act from the air screw. Close the screw (15 Nanometers).
  6. Fill in a liquid further until it will not act from a ventilating aperture.
  7. Again shift a heat exchanger hose in initial position (close a ventilating aperture) and tighten a collar.
  8. Then completely pour a liquid.
  9. Screw up запорную a cover on a broad tank.
  10. Start the engine, and let it works until the radiator does not become hot in the field of the bottom connecting knot.
  11. If it is necessary, correct liquid level. It should be between marks MIN and MAX a broad tank; when the engine hot, that, naturally, above.
  12. Be cautious, opening запорную a cover at a hot cooling liquid.