Installing the oil coolant heat exchanger

NOTE: TECHNICAL INFORMATION
Make sure that there are no particles or impurities in the medium openings. Coolant or foreign substances in the oil can cause engine damage such as damage to the connecting rod bearing.

NOTE: RISK OF DAMAGE
Damage to the surface.
The use of metal-cutting tools (e.g., emery cloths) for cleaning surfaces can damage them and lead to leaks and/or engine damage.

Do not use any metal-cutting tools.

Clean sealing surface (1) on oil-to-coolant heat exchanger.

Courtesy of BMW OF NORTH AMERICA, INC.
Replace all the seals (1).
Parts: Seals
Install all seals (1).

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Feed in oil coolant heat exchanger (A) and position.
Tighten screws in the order (1) to (6).

NOTE: Tighten the bolts in 360 degree steps.

TIGHTENING TORQUES SPECIFICATION

Oil-to-water heat exchanger to full-flow oil filter
M6	tightening torque	10 Nm

Fig 1: Oil Coolant Heat Exchanger Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work

Refer to INSTALLING THE OIL FILTER ELEMENT (540I 2017-2020) , or INSTALLING THE OIL FILTER ELEMENT (540i 2021-2022) .
Refer to INSTALLING FAN COWL .
Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
Refer to INSTALLING FRONT CROSS CONNECTION .
Refer to INSTALLING BOTH FRONT-END STRUTS .
Refer to INSTALLING THE COVER ON THE LEFT AND RIGHT IN THE ENGINE COMPARTMENT AT THE TOP .
Refer to POUR IN MOTOR OIL (MOTOR OIL CHANGE) (540i 2017-2020)FILLING ENGINE OIL (540i 2021-2022) .
Refer to OPENING THE OIL FILLER CAP .
Refer to FILLING AND VENTING THE HIGH-TEMPERATURE COOLANT CIRCUIT .
Refer to CHECKING ENGINE OIL LEVEL .
Refer to INSTALLING THE CENTER UNDERBODY PROTECTION .
Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR OR THE FRONT THRUST FIELD .
Refer to INSTALLING THE FRONT UNDERBODY PROTECTION OR FRONT THRUST FIELD .
Refer to INSTALLING THE FRONT HOOD SEAL AT THE REAR .
Refer to INSTALLING ACOUSTIC COVER .