11 53 740 Removing and installing/replacing water pipe (N52)

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2008 BMW Z4, 2007 BMW Z4, 2007 BMW 530xi, 2007 BMW 530i, and 2007 BMW 525xi. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding!

Only perform these tasks on an engine that has cooled down.

Recycling:

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks:

Remove front splash guard.
Drain Coolant from radiator.

Release screws (2).

For tightening torque refer to 11 53 2AZ in 11 53 THERMOSTAT AND CONNECTIONS (N52) .

Remove water pipe in direction of arrow.

Installation:

Seal (1) must not show any traces of damage; check and if necessary replace.

Fig 1: Identifying Water Pipe Mounting Screws And Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten hose clip (1).

Detach water pipe in direction of arrow from water pump (2).

Fig 2: Identifying Water Pipe Hose Clip And Water Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten hose clip (1).

Detach water hose (3) from water pipe (2).

Fig 3: Identifying Water Hose, Water Pipe And Hose Clip

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace sealing ring (2).

Sealing lip (1) on water pipe (3) must not show any traces of damage.

If necessary, replace water pipe (2).

Fig 4: Identifying Sealing Lip On Water Pipe

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Vent Cooling System and check for leaks.