Get 100 ? Engine Ancillaries, Oil Tank and Water Cooler -> 100 ? 1.3 Engine Cooling System Guide for Audi R8 2 Door Second Generation (2016-2024)

100 – Engine Ancillaries, Oil Tank and Water Cooler

100 – 1.3 Engine Cooling System

The R8 LMS GT3 cooling system is specially optimised for use in a racecar.

The maximum cooler performance is only achieved when the cooler is cleaned

and the cooling fins (lamella) are realigned.

Scheme Diagram

Image 2: Scheme of Cooling System

Thermostat

The R8 LMS engine is equipped with a thermostat. The thermostat starts to

open at 85 °C. The thermostat is fully open at 95 °C.

Coolant

The capacity of the cooling system is 13.5 litres.

It is recommended that the coolant additive G13 (part number G013A8JM1) is

used.

The coolant filled at the time of delivery is frost proof to – 20 °C.

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100 – Engine Ancillaries, Oil Tank and Water Cooler

The mixture ratio is 35 % coolant additive to 65 % water.

For all events in hot countries, Audi Sport customer racing recommends that the

additive ratio is reduced from the ex-works value to the ratio of 10 % additive

and 90 % water. This mixture ratio provides no frost protection.

The cooling system must not be operated without coolant additive.

The additive protects all the components in contact with water from corrosion,

reduces cavitation, lubricates the water pump and increases the cooling fluid’s

boiling point.

After reaching operating temperature, the expansion reservoir cap must not be

opened. The system pressure to increase the coolant boiling point would reduce!

Coolant additive mixture ratio:

-

10 % additive / 90 % water

25 % additive / 75 % water

40 % additive / 60 % water

50 % additive / 50 % water

--> no frost protection!

--> frost protection to – 12 °C

--> frost protection to – 25 °C

--> frost protection to – 35 °C

Filling the Cooling System

It is recommended that only distilled water is used to mix with cooling

additives. Using distilled water optimises the corrosion protection.

Only fill the cooling system when the engine is cold.

To fill and bleed the cooling system optimally it is recommended that the filling

device VAS 6096 is used.

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100 – Engine Ancillaries, Oil Tank and Water Cooler

Special Tools Required

Cooling system filling device - VAS 6096

Adapter for cooling system tester - V.A.G 1274/8

-

Fill the VAS 6096 coolant reservoir with approx. 20 litres of premixed

coolant in the desired ratio.

Screw the adapter for the V.A.G 1274/8 cooling system tester onto the

coolant reservoir.

Fit the cooling system filling device VAS 6096 to the adapter V.A.G

1274/8.

-

Place the bleed hose (1) into a small container (2).

The air extracted contains a small amount of coolant, which should be

collected.

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100 – Engine Ancillaries, Oil Tank and Water Cooler

-

Close valves A and B by turning the levers perpendicular to the flow

direction.

Connect hose (3) to the pressurised air.

 Pressure: 6 – 10 bar

Open valve B by turning the level in the flow direction.

 The suction pump generates negative pressure in the cooling

system, the dial indicator needle must move into the green range.

Open valve A briefly by turning the lever in the flow direction to that the

VAS 6096 coolant reservoir hose fills with coolant.

Close valve A.

-

Leave valve B open for another 2 minutes.

 The suction pump continues to generate negative pressure in the

cooling system; the dial indicator needle must remain in the green

range.

-

Close valve B.

 The dial indicator needle must remain in the green range, if so, the

negative pressure in the system is sufficient for the subsequent

filling.

 Repeat the procedure if the dial indicator needle is below the green

range. If the negative pressure falls, the cooling system must be

checked for leaks.

-

Disconnect the pressure hose.

Open valve A.

 The negative pressure in the cooling system draws the coolant out

of the coolant reservoir VAS 6096 and the cooling system fills.

Remove the VAS 6096 cooling system filling device from the V.A.G

1274/8 adapter on the expansion reservoir.

Disconnect quick release fitting 1 and 3.

-

Open the bleed nipple on the water cooler until coolant escapes.

Close the bleed nipple.

Replenish coolant.

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100 – Engine Ancillaries, Oil Tank and Water Cooler

Tighten the expansion reservoir cap

-

 The cap must click audibly and noticeably into position when

closing.

Only check the coolant level when the engine is cold.

 When the engine is cold, the coolant must be level with the ‘MAX’

mark.



When the engine is at operating temperature, the coolant level can

be above the ‘MAX’ mark.

Image 3: Expansion Reservoir

If air is still in the system after bleeding, it is recommended that the bleed

nipple on the water cooler is opened with the engine at normal operating

temperature until coolant escapes from the bleed nipple. This procedure should

be repeated until only coolant escapes after the bleed nipple is opened.

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100 ? Engine Ancillaries, Oil Tank and Water Cooler -> 100 ? 1.3 Engine Cooling System for Your Audi R8 2 Door Second Generation (2016-2024)

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100 ? Engine Ancillaries, Oil Tank and Water Cooler

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