Coolant Mixture Ratio

• Coolant (40%) and distilled water (60%) for freeze protection down to -25 °C (-13 °F)
• Coolant (50%) and distilled water (50%) for freeze protection down to -36 °C (-32.8 °F)
• Coolant. Refer to the Parts Information.

Coolant, Filling

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• Used coolant cannot be used again.

-- Fill the coolant reservoir from the :VAS6096  with 10 liters of coolant with the correct mixture ratio. Refer to Coolant Mixture Ratio  for the mixture ratio.

-- Install the :VAG1274/8  on the coolant expansion tank -1-.

-- Attach the :VAS6096  on the :VAG1274/8  .

-- Place the drain hose -2- in a small container -3-.

TIP:

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

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

-- Connect the hose -4- to compressed air.

• Pressure: 7 to 10 bar (101.52 psi to 145.03 psi) positive pressure.

-- Open the coolant circuit valves and select 01 - coolant circuit bleeding  in Guided Functions  using the Vehicle Diagnostic Tester.

-- Open the valve -B- by turning the lever in the flow direction.

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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 the valve -A- by turning the lever in the flow direction so that the hose on the :VAS6096  coolant reservoir fills with coolant.

-- Close the valve -A- again.

-- Leave the 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 the green area.

-- Close the 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.
• Repeat the procedure if the needle goes below the green range.
• Check the cooling system for leaks if the pressure drops.

-- Remove the pressure hose.

-- Open the valve -A-.

• Coolant is extracted from the :VAS6096  coolant reservoir by pressure in the coolant system and the system is filled.

-- Remove the :VAS6096  from the :VAG1274/8  on coolant expansion tank.

-- Connect the :VAG1274/10  to the :VAG1274/8  .

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-- Fill the :VAG1274/10  with coolant. Fill again during the bleeding procedure if required.

Bleed Cooling System

-- Remove the plenum chamber cover. Refer to Plenum Chamber Cover, Removing And Installing .

-- Loosen the hose clamp -1- on the coolant hose to the heat exchanger and pull back the coolant hose until the connection no longer covers the bleeder hole -arrow-.

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

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

-- Close the coolant expansion tank cap until it locks into place.

-- Start the engine.

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

-- Install the plenum chamber cover. Refer to Plenum Chamber Cover, Removing And Installing .