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Home >> BMW >> 2009 >> M3 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 74 (Cooling System - Repair - E90) >> Engine Radiator With Attachment >> 17 11 100 Removing and installing/replacing coolant expansion tank (S65)

17 11 100 Removing and installing/replacing coolant expansion tank (S65)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks: 

Unlock coolant hoses and detach.

Release screws.

Raise expansion tank slightly until plugs on coolant level switch and lower coolant hose are accessible.

Unlock plugs on coolant level switch and lower coolant hose and disconnect.

Remove coolant expansion tank.

Installation: 

Insert locating pin in rubber grommet.

Fig 1: Identifying Coolant Expansion Tank
G06203635Courtesy of BMW OF NORTH AMERICA, INC.

VENT COOLING SYSTEM  and check for leaks.