BMW 7 Owners & Service Manuals

BMW 7 Series: Removing And Installing Radiator (N63, N74)

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

IMPORTANT: Wear safety goggles and protective gloves.

Necessary preliminary tasks

  • Remove FAN COWL.

    Drain COOLANT

  • Draw off A/C SYSTEM.
  • Unlock and detach coolant hoses on radiator.

Release screws (1).

Tightening torque 17 10 6AZ.

Detach A/C lines (2) and place to one side.

Engine Radiator With Attachment
Fig. 33: Identifying A/C Line With Mounting Screws

Installation note:

Replace sealing rings.

Release screws (1) on left and right from cover (3).

Tightening torque 17 10 1AZ.

Release screws (2) behind sealing lip.

Tightening torque 17 10 1AZ.

Lift out cover (3).

Engine Radiator With Attachment
Fig. 34: Identifying Radiator Cover With Mounting Screws

Remove radiator (1) towards top.

Engine Radiator With Attachment
Fig. 35: Removing Radiator Towards Top

Reassemble the vehicle.

Fill A/C SYSTEM.

Check COOLING SYSTEM for leaks.

REMOVING AND INSTALLING/RENEWING COOLANT EXPANSION TANK (N63)

Necessary preliminary work

  • Drain COOLANT.
  • Remove left TRAILING LINK.
  • Remove left intake duct.
  • Release EXPANSION TANK for hydraulic steering or dynamic drive and place to one side.

Release screw (1).

Tightening torque 17 10 2AZ.

Release and disconnect coolant hoses (2).

Raise expansion tank (3)

Engine Radiator With Attachment
Fig. 36: Identifying Coolant Expansion Tank With Hoses And Mounting Screws

Unlock connector (1) on coolant level switch and disconnect.

Remove expansion tank (2).

Engine Radiator With Attachment
Fig. 37: Identifying Coolant Expansion Tank With Coolant Level Switch Connector

Assemble engine.

Top up COOLANT.

Check cooling system for LEAK TIGHTNESS.

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