Removing and installing/replacing engine oil cooler (S55 engine)

Only perform this repair work on an engine that has cooled down.

Recycling: 

Engine oil escapes when engine oil pipes are released. Collect any escaping engine oil using a suitable vessel and dispose of it.

Observe country-specific waste disposal regulations.

Necessary preliminary work: 

• Remove FRONT UNDERBODY PROTECTION .

Removal: 

Release screws (1).

Pull engine oil pipe from engine oil cooler.

Catch and dispose of emerging oil.

Seal engine oil pipes with suitable bungs.

Unfasten screws (2).

Remove engine oil cooler (3).

Courtesy of BMW OF NORTH AMERICA, INC.

Preparation for installation: 

Replace sealing rings (1) on engine oil pipes (2).

Parts  : Sealing ring

On installation, coat sealing ring with suitable lubricant.

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Install engine oil cooler (3).

Tighten down screws (2).

Tightening torque 17 22 3AZ .

Connect engine oil pipes to engine oil cooler.

Tighten down screws (1).

Tightening torque 17 22 5AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work: 

• Install FRONT UNDERBODY PROTECTION .
• After completing the repair work, check the oil level in the engine; top up if necessary.