17 00 039 Venting cooling system and checking for water leaks (N63): Notes

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WARNING: Danger of scalding!
Open sealing cap only after engine has cooled down.

IMPORTANT: You must protect the alternator against contamination before carrying out any work on the coolant circuit.
Cover alternator with suitable materials.
Failure to comply with this procedure may result in an alternator malfunction.

IMPORTANT: Electric coolant pump!
Follow instructions for working on cooling system .

IMPORTANT: Lifetime coolant filling:
Never reuse used coolant!
When replacing and removing components which rely on the corrosion protection effect of the coolant, it is essential to change the coolant. The cooling system must therefore be drained and refilled.
In the case of other removal work involving the draining of partial quantities of coolant, replace these quantities which have been drained with new coolant.

Only when refilling!

Use only recommended coolant .

Observe mixture ratio .

Observe filling capacities.

Perform filling operation slowly.

Adjust coolant level to max.

Fig 1: Identifying Coolant Level To Max

Courtesy of BMW OF NORTH AMERICA, INC.

Close coolant expansion tank.

Installation:

Close cap (1) until the arrow marks line up.

Fig 2: Locating Coolant Expansion Tank Cap

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The following venting procedure is necessary when a part is replaced in the cooling system or when the cooling system is refilled.