17 11 100 Removing and installing/replacing coolant expansion tank (N62)

WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding! Only carry out work on cooling system after engine has cooled down.

Recycling:

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

Necessary Preliminary Tasks:

Drain coolant from radiator.

NOTE: Illustration shows E65.

Unlock plug (1) and remove.

Fig 1: Locating Expansion Tank Plug Connection

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NOTE: Illustration shows E65.

Unlock and disconnect coolant hoses (2) and (3).

Release screws (1).

Remove coolant expansion tank (6) in direction of arrow.

Unlock and disconnect coolant hose (4) with tank (6) released.

Fig 2: Identifying Coolant Hoses

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Adding Coolant:

Vent cooling system and check for leaks. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .