2012 AUDI A4 B8 Service and Repair Manual

2008-2015 AUDI A4 SERVICE AND REPAIR MANUAL

ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant) 19 COOLING SYSTEM GENERAL INFORMATION COOLANT, DRAINING AND FILLING Special tools and workshop equipment required  Adapter V.A.G 1274/8 Adapter for V.A.G 1274 Tester V.A.G 1274/10  Hose Clip Pliers V.A.G 1921  Cooling System Charge Unit VAS 6096  Drip Tray VAS 6208  Refractometer T10007 Draining -- Open the coolant reservoir cap. -- Remove the front noise insulation. Refer to Description and Operation . -- Place the VAS 6208 under the engine. -- Remove the drain plug -1- and drain the coolant. NOTE: Collect escaping coolant in a clean container for disposal or reuse. WARNING: Risk of scalding due to hot steam and hot coolant.  The coolant system is under pressure when the engine is warm.  Reduce pressure by covering coolant reservoir cap with a cloth and carefully open. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

Fig. 1: Identifying Coolant Drain Plug Courtesy of AUDI OF AMERICA, LLC Filling NOTE: Ignore -2-. NOTE: The cooling system is filled year year-round with a mixture of water and coolant additive. Mixture ratio Coolant Mixture Ratio . Other coolant additives may above all reduce the corrosion protection effect significantly. The damage resulting from this may lead to loss of coolant and consequently to severe engine damage. Coolant with the correct mixture ratio Coolant Mixture Ratio prevents freezing and corrosion damage and calcium deposits. They also raise the boiling point. For this reason the system must be filled all year round with frost and corrosion protection additives. Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates. Protection against frost must be assured down to approximately -25 °C (-13 °F) (in arctic climatic countries down to approximately -35 °C (-31 °F)). The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. Coolant additive portion must be at least 40%. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

Coolant Mixture Ratio  Coolant (40%) and water (60%) for freeze protection down to -25 °C (-13 °F)  Coolant (50%) and water (50%) for freeze protection down to -40 °C (-40 °F)  Coolant, -- Close the drain plug -1-. Fig. 2: Identifying Coolant Drain Plug Courtesy of AUDI OF AMERICA, LLC -- Fill coolant reservoir on the VAS 6096 with 10 liters of premixed coolant with the proper mixture ratio, for the mixture ratio Coolant Mixture Ratio . If more freeze protection is needed due to the climate, increase the amount of coolant additive, but only up to 60% (freeze protection down to -40 °C (-40 °F)). Otherwise the freeze protection and cooling effectiveness will be reduced. Only use clean drinking water for mixing coolant. If radiator, heat exchanger, cylinder head or head seal or cylinder block were replaced, do not reuse used coolant. Dirty coolant may not be used again. Use the T10007 to determine the level of freeze protection in the coolant system. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

Fig. 3: Filling Coolant Reservoir Of Cooling System Charge Unit VAS 6096 With At Least 15 Liters Of Pre - Mixed Coolant Courtesy of AUDI OF AMERICA, LLC -- Attach V.A.G 1274/8 to coolant reservoir. -- Install the VAS 6096 on the V.A.G 1274/8. -- Place air outlet -1- in a small container -2-. -- Close valves -A and B- by turning lever at a right angle to direction of flow. -- Connect hose -3- to compressed air.  Pressure: 6 to 10 bar pressure. -- Open valve -B- by turning level in direction of flow. NOTE: A small amount of coolant which should be collected is drawn off with the discharged air. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

Fig. 4: Cooling System, Draining And Filling Courtesy of AUDI OF AMERICA, LLC  The suction jet pump generates pressure in the coolant system; indicator on display instrument must move into green area. -- Briefly open valve -A- by turning lever in direction of flow so that the hose on VAS 6096 coolant reservoir fills with coolant. -- Close valve -A- again. -- Leave valve -B- open another 2 minutes.  More pressure is generated in the coolant system by the suction jet pump; indicator on display instrument must stay in the green area. -- Close valve -B-.  Needle in the display instrument must remain in the green region, then the sufficient vacuum in the cooling system is obtained for the upcoming filling. -- Remove pressurized air hose. -- Open valve -A-.  Coolant is extracted from the VAS 6096 coolant reservoir by pressure in the coolant system and the NOTE: If needle stands below the green area, repeat procedure. If pressure falls, check coolant system for leaks. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

system is filled. -- Remove the VAS 6096 from the V.A.G 1274/8 on coolant reservoir. -- Connect the V.A.G 1274/10 to the V.A.G 1274/8. Fig. 5: V.A.G 1274/10 & V.A.G 1274/8 Courtesy of AUDI OF AMERICA, LLC -- Unclip the plenum chamber cover -2- and remove it. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

Fig. 6: Removing Plenum Chamber Covers Courtesy of AUDI OF AMERICA, LLC -- Loosen the coolant hose to the heat exchanger and pull it back until the connection no longer covers the bleeder hole -arrow- in the coolant hose. Fig. 7: Locating Heat Exchanger Bleeder Hole Courtesy of AUDI OF AMERICA, LLC -- Fill the coolant until it escapes from the coolant hose bleeder hole. NOTE: Ignore items -1 and 3- and the -arrow-. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

-- Slide the coolant hose onto the connection and secure with a spring clamp. -- If the vehicle has an auxiliary heater, switch it on for about 30 seconds. -- Close coolant reservoir cap. -- Start the engine. -- Adjust the temperature for all zones to "HI". -- Press the ECON button to turn off the A/C compressor. -- Run the engine at 2000 RPM for 3 minutes. -- Run the engine at idle until both large coolant hoses on the radiator are warm. -- Run the engine at 2000 RPM for 2 minutes. -- Turn off engine and allow it to cool off. -- Install the front noise insulation. Refer to Description and Operation . -- Check the coolant level.  Coolant level must be at "MAX" marking with engine is cold. WARNING: Risk of scalding due to hot steam and hot coolant.  The coolant system is under pressure when the engine is warm.  Reduce pressure by covering coolant reservoir cap with a cloth and carefully open. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

Fig. 8: Identifying Coolant Reservoir Marking Courtesy of AUDI OF AMERICA, LLC  Coolant level may be above "MAX" marking with engine at operating temperature. DESCRIPTION AND OPERATION COOLANT HOSE CONNECTION DIAGRAM WARNING: Risk of scalding due to hot steam and hot coolant.  The coolant system is under pressure when the engine is warm.  Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. NOTE: When the engine is warm the cooling system is under pressure. If necessary release pressure before commencing repair work. Secure all hose connections using hose clamps appropriate for the model type. The hose clip pliers V.A.G 1921 or hose clip pliers VAS 6340 are recommended for installing spring clamps. Always replace gaskets and seals. Arrows on coolant pipes and coolant hoses must line up across from each other. 2011 Audi A4 2.0T Quattro ENGINE 2.0 Liter - Cooling System - Engine Code(s): CAEB (Avant)

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2012 AUDI A4 B8 Service and Repair Manual

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