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Audi A4, S4since 2000 of releaseRepair and car operation |
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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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Antifreeze - means of protection from freezing Cooling liquid The system of cooling is all-the-year-round filled with a mix of water, antifreeze and anticorrosive means. It interferes with a rust and corrosion, adjournment of salts and, besides, increases temperature of boiling of cooling liquid. In cooling system because of liquid expansion when heating superfluous pressure is created that also conducts to temperature increase of boiling of cooling liquid. Pressure is limited located in a cover of a broad tank to the valve which opens at pressure 1.4 – 2.0 atm. For faultless functioning of system of cooling it is required to be insured from boiling of cooling liquid at which the steam stopper therefore circulation of liquid decreases can be formed and cooling of the engine worsens. The temperature of boiling should be raised. For this purpose the cooling system always should be filled with a mix of water and the listed additives to it. |
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