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Home >> BMW >> 2012 >> X5 35d >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair >> Oil Cooler >> 11 44 000 Removing and installing/replacing oil-to-water heat exchanger (N54/N55)

11 44 000 Removing and installing/replacing oil-to-water heat exchanger (N54/N55)

Special tools required: 

WARNING: Risk of scalding!
Only perform this repair work on an engine that has cooled down.

Recycling: 

Catch and dispose of drained coolant.

Observe country-specific waste disposal regulations.

IMPORTANT: Lifetime coolant filling:
Never reuse used coolant!
When replacing and removing components which rely on the corrosion protection effect of the coolant, it is essential to change the coolant. The cooling system must therefore be drained and refilled.
In the case of other removal work involving the draining of part quantities of coolant, replace these quantities which have been drained with new coolant.

Installation note: 

Use only recommended coolant. See RADIATOR -- OPERATING FLUIDS .

Observe mixture ratio. See RADIATOR -- OPERATING FLUIDS .

Protective measures/rules of conduct: 

IMPORTANT: For dirt contamination of the cooling system (e.g. by engine oil), the cooling system must be rinsed with water until all dirt contamination is removed!
IMPORTANT: Risk of skidding due to coolant on the floor.
Danger of injury! 

Catch and dispose of drained coolant in drip tray (1) and if necessary special tool 00 2 030 (universal hydraulic lifting equipment).

Recycling: 

Observe country-specific waste disposal regulations.

Fig 1: Identifying Coolant Drip Tray And Special Tool (00 2 030)
G09954048Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary tasks: 

Unclip Bowden cable for engine compartment lid operation from transverse reinforcement.

Release screws (1) and remove transverse reinforcement (2).

Fig 2: Identifying Transverse Reinforcement Screws
G09954049Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, release A/C lines (1) from holder (2).

Remove holder (2).

Fig 3: Identifying A/C Lines Holder
G09954050Courtesy of BMW OF NORTH AMERICA, INC.

Release coolant hose (1).

Unfasten screws (2).

Tightening torque: 11 42 3AZ .

Installation note: 

Replace all gaskets.

Fig 4: Identifying Coolant Hose, Clamp And Screws
G09954051Courtesy of BMW OF NORTH AMERICA, INC.

Adding coolant: 

Use only recommended coolant. See RADIATOR -- OPERATING FLUIDS .

Observe mixture ratio. See RADIATOR -- OPERATING FLUIDS .

Observe capacities.

Fill and vent COOLING SYSTEM .

Observe bleeding instructions without fail. 

Fig 5: Locating Coolant Level (MAX And MIN)
G09954052Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Installation note: 

BLEEDING INSTRUCTION must be observed without fail.

Fill COOLING SYSTEM .

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