1700039 Venting and filling cooling system with vacuum filling unit: Application

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Connect filling unit (1) with adapter (2) 17 0 113 to coolant expansion tank.

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

Fig 1: Identifying Coolant Filling Unit With Adapter And Shut-Off Valves

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Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Coolant Filling Unit With Venturi Nozzle

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

The venturi nozzle produces a flow noise.

Fig 3: Identifying Shut-Off Valve With Compressed Air Line

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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 Coolant Filling Hose With Shut-Off Valve

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Courtesy of BMW OF NORTH AMERICA, INC.

Shutoff valve (B) remains open. Approx. 1 minute. Generate vacuum in cooling circuit. The final 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 build-up.

Then close shutoff valve (B) again.

Fig 5: Identifying Coolant Shut-Off Valves

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Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 6: Identifying Venturi Nozzle With Shut Off 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 leaks, check COOLING SYSTEM FOR LEAKS .

Fig 7: Checking Cooling System For Leaks

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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.

Shutoff 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 process is finished when the needle in the vacuum meter is at 0 bar or no longer falls.

Fig 8: Identifying Cooling System Shut-Off Valves

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Courtesy of BMW OF NORTH AMERICA, INC.

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

Remove filling unit with adapter from expansion tank.

Adjust coolant level to max.

Fig 9: Adjusting Coolant Level To Maximum

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Close coolant expansion tank.

Installation note:

Close the sealing cap (1) until the arrows line up.

Fig 10: Identifying Coolant Expansion Tank Sealing Cap

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Check function of cooling system.

Check COOLING SYSTEM FOR LEAKS .