11 53 740 Removing and installing/replacing feed line

WARNING:

Danger of scalding!

Only perform this work after engine has cooled down.

Recycling:

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks:

Drain COOLANT .
Remove both catalytic exhaust-gas converters. See CONVERTER FOR CYLINDERS 1-3 and CONVERTER FOR CYLINDERS 4-6 .

Unfasten hose clip (1).

Tightening torque: 11 51 4AZ .

Detach coolant hose of feed line in direction of arrow from coolant pump (2).

Fig 1: Identifying Coolant Hose And Coolant Pump

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Risk of damage!

Where necessary, to release the coolant feed lines (3 and 4), do not place pliers on the pipes.

Release screws (1 and 2).

Tightening torque: 11 53 10AZ .

If necessary, release coolant feed lines (3 and 4) with suitable pliers at connection.

Installation note:

Replace O-rings.

Fig 2: Identifying Screws And Feed Lines

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

For purposes of clarity, the graphic shows the released coolant feed lines removed.

Release screws (1).

Tightening torque: 11 53 3AZ .

Remove feed line (2).

Installation note:

Replace seal.

Fig 3: Identifying Screws And Feed Line

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

VENTING INSTRUCTIONS must be observed without fail .