Audi A4, S4
+ Introduction
+ Governing bodies and receptions of safe operation
+ Current leaving and service
+ Engine
- Systems of cooling, heating and air conditioner
- Cooling system
General information
Antifreeze - means of protection from freezing
Replacement of cooling liquid
Removal and thermostat installation
Thermostat check
Replacement of hoses of system of cooling
Removal and radiator installation
Removal and installation of the fan of a radiator
Removal and installation of the pump of cooling liquid
+ Systems of ventilation, heating and air conditioning
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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Replacement of cooling liquid Cooling liquid should be replaced only in case of repair of system of cooling of the engine if thus liquid merged. Liquid replacement within carrying out maintenance is not provided. If at carrying out repair the head of cylinders, sealing laying of a head of cylinders, a radiator, the heat exchanger or the engine were replaced, cooling liquid should be replaced in any case. It is necessary for the reason that corrosion and protective components of liquid in process extra earnings are besieged on engine elements from easy alloys and thus form long-term anticorrosive protection. At the cooling liquid which was in operation corrosion and protective components already substantially are spent and cannot create sufficient protection on new details.
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The merged cooling liquid should not be applied again. Cooling liquid is poisonous and should not merge with a household waste. |
Removal of cooling liquid
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At l engines 2.0, 4.2 (AWA, BBK) the system of cooling is filled with liquid on HUNDRED by means of the vacuum pump. If necessary, on HUNDRED of system of cooling air is removed. |
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Remove the bottom cover of an impellent compartment, address to the Section Removal and installation of the top cover of the engine / the bottom protection of an impellent compartment/stretcher.
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When opening a broad tank on the hot engine cover a tank with a thick rag to exclude emission of hot liquid and steam. The cover is authorized to be removed only at liquid temperature below + 90°С. |
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Open a cover of a broad tank.
Substitute under a radiator capacity.
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Engines 1.6, 1.8, 1.9, 2.5 of l and engine of 2.0 l of ALT: Completely merge cooling liquid from a radiator. For this purpose take out a lock bracket (1) sensor of temperature of cooling liquid (2) of the bottom hose and take out the sensor.
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L engine 1.9, 2.4, 3.0: If on a radiator there is a drain stopper (2), turn it to the left and merge cooling liquid.
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That cooling liquid to direct to a certain place, put on the drain union an auxiliary hose. If the drain stopper is not present, merge cooling liquid through an opening for the sensor of temperature (3). For this purpose take out a lateral lock bracket and then take out the temperature sensor. |
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All engines except 2.0 l of FSI (AWA), 4.2 l (VVK) and a diesel engine of 2.5 l: Release a collar and displace it completely back. Remove a hose from a radiator (the shooter on an accompanying illustration) and merge the liquid remains. Then at once again put on a hose and fix it a collar.
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On an illustration the petrol engine is shown. |
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Engine of 2.0 l of AWA: Open a drain stopper (1) on a pipe of a radiator and merge the remains of cooling liquid. Then at once close it. (2) – a fastening nut, (3) - the oil filter.
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Diesel engine of 2.5 l
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Merge cooling liquid from the engine. For this purpose turn out a drain stopper (2 on an accompanying illustration). (1) – a lock bracket for the thermal switch (the switch is already taken out).
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Remove a hose of cooling liquid on a radiator on the left side of the engine. For this purpose open a collar (1) flat-nose pliers, for example, HAZET 798-5 and displace it completely back.
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(2) and (3) it is not necessary to remove hoses. |
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Engine of 4.2 l of VVK: Turn out a drain stopper on the case of the thermostat and completely merge cooling liquid.
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After all liquid merged, again insert the sensor of temperature of cooling liquid into the bottom hose and fix it a lock bracket. On engines 1.9, 2.4, 3.0 of l tighten a drain stopper.
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Put on a hose a radiator and fix it a collar.
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Filling of system with cooling liquid
Engines of 2.0 l (ALT), 2.4 and 3.0 l
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Screw on a broad tank the AUDI 1274/9 union with an auxiliary hose of Ø 42 mm and length of 100 mm or AUDI 1274/8 (In) with the extension piece 1274/10 (And).
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The union serves to exclude a liquid modulation after engine start. If the specified union available is not present, it can be made independently. Instead it is possible to remove also from the holder a broad tank, to lift it on height of 10 cm with the attached hoses and in this situation to fix it a wire. |
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Uncover a water modular compartment, address to the Section Removal and installation of a cover of a water modular compartment.
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Engine of 2.0 l (ALT) and diesel engine of 1.9 l
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Release a collar of the top hose and displace it back. Displace a heater hose back so that the ventilating opening in a hose (an arrow on an accompanying illustration) was not closed by the connecting union.
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Open a ventilation stopper (the shooter on an accompanying illustration) on a pipe of cooling liquid.
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Fill system with liquid so that she acted through ventilating openings.
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Close points of removal of air in sequence of an exit of cooling liquid.
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L engines 2.4, 3.0
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Remove a forward cover of the engine (an arrow on an accompanying illustration).
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Turn out a ventilating stopper (the shooter on an accompanying illustration).
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Fill system with cooling liquid so that she acted at a ventilating opening.
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Screw a ventilating stopper with a new sealing ring and tighten it the moment 15Нм.
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Open a collar of the top hose of a heater and displace it back. A hose of a heater delay back so that the ventilating opening in a hose of cooling liquid (the shooter on an accompanying illustration) was not closed by the connecting union.
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Diesel engine of 2.5 l
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Unscrew on a wall of an impellent compartment approximately on 2 turns unions for air removal from heater hoses (the shooter on an accompanying illustration).
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Fill system with cooling liquid so that she acted at unions for air removal. Several times compress hands the top thick hose. It promotes air allocation. Tighten unions for air removal.
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All engines
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Close a broad tank.
Start the engine and establish approximately on 3 mines of 2.000 rpm.
Then let's to the engine work on single turns so much that the bottom hose of a radiator heated up.
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When opening a broad tank on the hot engine cover a tank with a thick rag that will exclude emission of hot liquid and steam. The cover is authorized to be removed only at liquid temperature below + 90°С. |
Check level of cooling liquid and, if necessary, add it to MAX mark.
On the heated-up engine level of liquid should be on MAX mark, on the cold engine between MAX and MIN marks.
Stop the engine.
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