Coolant Mixture Ratio

WARNING: This page is about a different variant/trim than selected.

Coolant (40%) and water (60%) for freeze protection down to -25 °C (-13 °F)

Coolant (50%) and water (50%) for freeze protection down to -35 °C (-31 °F)

-- Connect the lower coolant hose -1- to the radiator.

Fig 1: ECT Electrical Connector

Courtesy of AUDI OF AMERICA, LLC

-- Connect coolant hose to after-run coolant pump -arrow-.

Fig 2: Coolant Hose After-Run Coolant Pump V51

Courtesy of AUDI OF AMERICA, LLC

-- Fill coolant reservoir on VAS 6096 with 10 liters of premixed coolant with the proper mixture ratio COOLANT, DRAINING AND FILLING .

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 the V.A.G 1274/8 to the coolant reservoir.

-- Install VAS 6096 on V.A.G 1274/8.

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

NOTE:

A small amount of coolant which should be collected is drawn off with the discharged air.

-- 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.

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 the valve -A- by turning lever in direction of flow so that 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 the display instrument must stay in the green area.

-- Close valve -B-.

Needle in the display instrument must remain in the green region, then sufficient vacuum in the cooling system is obtained for the upcoming filling.

NOTE:

If needle stands below the green area, repeat procedure.

If pressure falls, check coolant system for leaks.

-- Remove pressurized air hose.

-- Open valve -A-.

Coolant is extracted from the VAS 6096 coolant reservoir by pressure in the coolant system and the system is filled.

-- Check the coolant level.

Fig 5: Identifying Expansion Tank Max/Min Fill Marking

Courtesy of AUDI OF AMERICA, LLC

-- Fill coolant up to "max" marking.

-- Start engine and run at approximately 1500 RPM for a maximum of 2 minutes.

-- With the engine running, fill coolant up to overflow hole on coolant expansion tank.

-- Close the cap on the coolant reservoir.

-- Start the engine and let it run at approximately 3000 RPM until the coolant fan starts running.

WARNING:

Risk of scalding due to hot steam and hot coolant.

The coolant system is under pressure when the engine is warm.
Cover the coolant reservoir cap with a cloth and then open it slowly to release the pressure in the system.

-- Check coolant level.

With warm engine, coolant level must be at "max" marking, with cold engine, between "min" and "max" marking.

-- If necessary, fill with coolant again.

-- Shut off engine.

Assemble in reverse order of disassembly.

NOTE:

The hose supports, air guide pipes and hoses must be free of oil and grease before installing.

Secure all hose connections with hose clamps of the same type as those equipped by the factory.

To mount the charge hoses on their connectors securely, spray the bolts on the used clamps with rust remover before installing.