Coolant, Filling

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NOTE:

Used coolant cannot be used again.

-- Fill the coolant reservoir from the :VAS6096 with 10 liters (10.5 quarts) 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.

-- 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 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.

Bleed Cooling System

Fig 1: Identifying Coolant Reservoir

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-- Fill the coolant up to "max" marking.

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

-- Start the engine.

Duration	Engine Speed	Conditions
Three minutes	2000 RPM	A/C system "OFF", the LED in the AC button does not turn on Heater on "HI", blower speed as low as possible (= 0)
Until both large coolant hoses on the radiator are warm	Idle	A/C system "OFF" Heater "HI"
2 Minutes	2000 RPM	A/C system "OFF" Heater "HI"

-- Turn off the engine.

Coolant Level, Checking

CAUTION:

The cooling system is under pressure when the engine is warm. Risk of scalding due to hot steam and hot coolant.

Scalding the skin and other parts of the body is possible.

- Wear safety gloves.

- Wear protective eyewear.

- Reduce the pressure by covering the coolant expansion tank cap with a cloth and carefully opening it.

Coolant level must be at "MAX" mark when the engine is cold.

Fig 2: Identifying Coolant Reservoir
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Coolant level may be above "MAX" mark with engine at operating temperature.

-- If necessary, fill the coolant again.

Tightening Specifications

Refer to OVERVIEW - NOISE INSULATION .