Coolant, Draining And Filling: Procedure

Fig 1: Identifying Drain Plug -Arrow- On Map Controlled Engine Cooling Thermostat -F265-

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-- Install the drain plug -arrow- with a new O-ring on the Map Controlled Engine Cooling Thermostat -F265-.

-- Install the front coolant pipe drain plug -arrow- with a new seal.

Fig 2: Identifying Drain Plug -Arrow- On Front Coolant Hose

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-- Audi RS4/RS5 Coupe: Connect the coolant hose to After-Run Coolant Pump -V51- -arrow-.

Fig 3: Identifying Clamp -Arrow

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-- Fill The Coolant Reservoir On The Cooling System Charge Kit:VAS6096  With At Least 15 Liters (15.8 qts)  Of Premixed Coolant With The Proper Mixture Ratio.

Fig 4: Filling Coolant Reservoir Of Cooling System Charge Unit VAS 6096

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-- Install the Cooling System Tester - Adapter:VAG1274/8  on the coolant expansion tank.

-- Attach the Cooling System Charge Kit:VAS6096  on the Cooling System Tester - Adapter:VAG1274/8  .

-- Place the air outlet hose -1- in a small container -2-.

-- Close valves -A and B- by turning lever at a right angle to direction of flow.

-- Connect the hose -3- to compressed air.

• Pressure:  6 to 10 bar (87 to 145 psi) pressure.

-- Open Valve -B- By Turning Level In Direction Of Flow.

Fig 5: Cooling System, Draining And Filling

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• 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 hose on the Cooling System Charge Kit:VAS6096  coolant reservoir fills with coolant.

-- Close valve -A- again.

-- Leave valve -B- open another two minutes.

• More Pressure Is Generated In The Coolant System By The Suction Jet Pump; Indicator On Display Instrument Must Stay In 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 Cooling System Charge Kit:VAS6096  coolant reservoir by pressure in the coolant system and the system is filled.

-- Remove the Cooling System Charge Kit: VAS6096  from the Cooling System Tester - Adapter:VAG1274/8  on coolant expansion tank.

-- Connect the Cooling System Tester - Adapter:VAG1274/10  to the Cooling System Tester - Adapter:VAG1274/8  .

Fig 6: Connecting V.A.G 1274/10 To V.A.G 1274/8

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-- Remove the bolts -3-.

Fig 7: Identifying Plenum Chamber Cover

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-- Remove the clips -2- from the mount and remove the plenum chamber cover -1-.

-- Loosen The Coolant Hose To The Heat Exchanger And Pull It Back Until The Connection No Longer Covers The Bleeder Hole In The Coolant Hose -arrow-.

Fig 8: Locating Heat Exchanger Bleeder Hole

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-- Fill the coolant until it escapes from the coolant hose bleeder hole.

-- Slide the coolant hose onto the connection and secure with a spring clamp.

-- If the vehicle has a parking heater, switch it on for about 30 seconds.

-- Close the cap on the coolant reservoir until it locks into place.

-- Start the engine.

-- Adjust the temperature for all zones to "HI".

-- Press the AC  button to turn off the Air Conditioning (A/C) compressor.

• The LED in the button must not come on.

-- 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 engine at 2000 RPM for 1 minute.

-- Turn off engine and allow it to cool off.

-- Install the front noise insulation. Refer To NOISE INSULATION, REMOVING AND INSTALLING .