17 11 100 Removing and installing/replacing coolant expansion tank (N63)

IMPORTANT: Danger of scalding!
Only perform this work after engine has cooled down.

Necessary preliminary tasks:

Follow instructions for working on cooling system.
Drain coolant from radiator down to lower edge on expansion tank.

Unlock and detach coolant hose (1).

Release screws.

Raise coolant expansion tank (2) slightly until plug for coolant level switch and lower coolant hose are accessible. Unclip line on side of expansion tank.

Installation:

Make sure expansion tank is in correct installation position.

Fig 1: Identifying Coolant Expansion Tank And Coolant Hose

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Unlock plug (1) and remove.

Unlock and detach lower coolant hose (2).

Remove expansion tank (3).

Fig 2: Identifying Expansion Tank, Lower Coolant Hose And Plug

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