11 44 000 Removing and installing/replacing oil-coolant heat exchanger

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Danger of scalding!

Only perform these tasks on an engine that has cooled down.

IMPORTANT:

You must protect the alternator against contamination before carrying out any work on the oil or coolant circuit.

A residual amount of coolant emerges when the hoses are detached. A residual amount of oil emerges when the oil-coolant heat exchanger is released. Have a cleaning cloth ready.

Cover alternator with suitable apparatus.

Necessary preliminary tasks:

Drain COOLANT .
Remove FAN COWL .

Release screw (1).

Tightening torque 11 42 3AZ .

Do not detach oil lines from oil-coolant heat exchanger in downward direction.

Installation note:

Replace O-rings.

Fig 1: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release bolts (1) on oil-coolant heat exchanger.

Remove oil-coolant heat exchanger towards front.

Installation note:

Replace seal.

Fig 2: Identifying Bolts On Oil-Coolant Heat Exchanger

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble car and set in horizontal position.

Vent COOLING SYSTEM and check for water leaks.

Start engine and run at idle until oil pressure warning lamp goes out.

Stop engine.

Wait approx. 5 minutes and check engine oil level.

Top up engine oil if necessary.