17 11... Bleed and fill the cooling system for the charge air cooler with the vacuum filling unit: Application

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Connect filling unit (1) with a suitable adapter (2) from special tool set 17 0 100 to the charge air cooler expansion tank.

Shutoff valves (A) and (B) must be closed.

Fig 1: Charging Air Cooler Expansion Tank Using Special Tool (17 0 100)

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Connect venturi nozzle (1) to filling unit (2).

Fig 2: Connecting Venturi Nozzle To Filling Unit

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Connect compressed air (1) and open shutoff valve (B).

The venturi nozzle produces a flow noise.

Fig 3: Opening Shutoff Valve Using Compressed Air

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Then open shutoff valve (A) until the filling hose (1) is free of bubbles. Close shutoff valve (A) again. The filling hose (1) is vented in this way.

Fig 4: Identifying Shutoff Valve And Filling Hose

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Shutoff valve (B) remains open. Generate vacuum in cooling cycle for approx. 1 minute. The end vacuum is reached at a vacuum of -0.7 to -0.95 bar. Green scale on the vacuum meter.

NOTE: The coolant hoses contract during vacuum buildup.

Then close shutoff valve (B) again.

Fig 5: Opening Shutoff Valve Using Compressed Air

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Both shutoff valves (A) and (B) must be closed.

Then seal Venturi nozzle (1).

Fig 6: Identifying Venturi Nozzle And Shutoff Valves

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The cooling system must hold the vacuum for 30 seconds. If the needle in the vacuum meter falls, this indicates a leak in the cooling system.

If the vacuum remains constant, proceed with filling.

In the event of a leak, check the cooling system for the charge air cooler for leaks.

Fig 7: Checking Cooling System For Leaks

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IMPORTANT: There must be sufficiently premixed coolant in the filling unit container, 1 - 2 liters more than the vehicle filling capacity.
Position the filling unit container at the same height as the coolant expansion tank.

Shut-off valve (B) remains closed during the filling process.

To fill the cooling system, open shutoff valve (A) to filling unit container.

Coolant is now added.

Fig 8: Identifying Shut Off Valves (Open And Close Position)

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The filling procedure is finished when the needle in the vacuum meter is at 0 bar or no longer falls.

If necessary, reduce remaining vacuum. Open shutoff valve (B) to do so.

Remove filling unit with adapter from expansion tank.

NOTE: After the cooling system has been filled with the vacuum filling unit, another bleeding procedure must be performed

Close charge air cooler expansion tank.

Adjust coolant level to maximum.

Check cooling system for charge air cooler for leaks.