11 44 000 Removing and installing/replacing oil-to-water heat exchanger (N54, N54T)

WARNING: Risk 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 cooling 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 engine oil pipe from oil-to-water 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.

Picture shows E9x

Installation note:

Replace seal.

Fig 2: Identifying Oil-Coolant Heat Exchanger Bolt

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.

Turn off engine.

Wait approx. 5 minutes and check oil level.

Top up engine oil if necessary.