11 28 035 Removing and installing/replacing friction gear (N18)

Special tools required:

Necessary preliminary tasks:

Remove RIGHT WHEEL ARCH COVER

Pull out friction gear with mechanical unlocking (3) in direction of arrow and lock on locking hook.

Friction gear (1) lifts mechanically off belt drive.

Disconnect plug connection (2) on friction gear.

NOTE: Picture shows friction gear removed.

Fig 1: Identifying Friction Gear, Mechanical Release, And Plug Connection

G04796262

Courtesy of BMW OF NORTH AMERICA, INC.

Move friction gear (2) into service position with max. 50 N.

To secure friction gear in service position, suspend tensioning strap (1) on housing (2).

Fig 2: Identifying Cable On Housing

G04796250

Courtesy of BMW OF NORTH AMERICA, INC.

Secure belt pulley of coolant pump with an oil filter strap (1).

Undo bolts (2) with special tool 11 9 581 and 11 9 583 .

Tightening torque: 11 51 2AZ .

Fig 3: Identifying Oil Filter Band And Bolts

G04796264

Courtesy of BMW OF NORTH AMERICA, INC.

Undo bolts (1) with special tool 11 9 583 and 11 9 581 .

NOTE: Drive belt does not have to be removed.

Fig 4: Releasing Bolts Using Special Tools

G04796265

Courtesy of BMW OF NORTH AMERICA, INC.

Remove friction gear (1) towards bottom.

Disconnect plug connection (2).

Fig 5: Identifying Friction Gear And Plug Connection

G04796266

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Bolt down friction gear in sequence 1 to 3

Tightening torque: 9 Nm.

Fig 6: Loosening/Tightening Sequence Of Friction Gear Bolts

G06907218

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Slowly retract tensioning strap (1) in direction of arrow.

Plastic ring (2) must engage in friction gear housing.

Fig 7: Retracting Pull Strap And Engaging Plastic Ring In Friction Gear Housing

G06907219

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Installation note:

Check cable routing for correct installation position (risk of damage!) .