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

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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: Connecting Filling Unit Using Adapter And Special Tool Set (17 0 100)

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Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Venturi Nozzle And Filling Unit

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Courtesy of BMW OF NORTH AMERICA, INC.

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

The venturi nozzle produces a flow noise.

Fig 3: Identifying Compressed Air Hose And Shutoff Valve

G08504222

Courtesy of BMW OF NORTH AMERICA, INC.

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 Filling Hose And Shutoff Valve

G08504223

Courtesy of BMW OF NORTH AMERICA, INC.

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: Identifying Compressed Air Hose And Shutoff Valve

G08504222

Courtesy of BMW OF NORTH AMERICA, INC.

Both shutoff valves (A) and (B) must be closed. Then seal Venturi nozzle (1).

Fig 6: Identifying Shutoff Valves And Venturi Nozzle

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Courtesy of BMW OF NORTH AMERICA, INC.

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 Leaks

G06889248

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 8: Identifying Shut-Off Valve (A And B)

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Courtesy of BMW OF NORTH AMERICA, INC.

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.

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.