11 41 050 Removing and installing/replacing oil suction pump (S65)

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: Excessively low or high play between the gearwheel pairs results in failure of the oil supply.

Necessary preliminary tasks:

Release screws (1).

Tightening torque. 11 41 3AZ .

Remove oil pump (2).

Fig 1: Identifying Oil Pump And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Replacing gear wheels

Necessary preliminary tasks:

Mount special tool 11 6 254 on crankcase.

Secure special tool 11 6 252 with magnetic base to special tool 11 6 254.

NOTE: Special tool 11 6 254 can only be secured to the crankcase with one screw.

Picture shows (S85).

Fig 2: Securing Special Tool (11 6 252) With Magnetic Base To Special Tool (11 6 254)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The oil pump chain of the oil suction pump must be removed.
The chain tensioner must not exert any tension on the oil suction pump.

Align special tool 11 6 251 with its measuring shaft (2) vertically to gearwheel (1).

Turn oil suction pump gearwheel (1) to stop.

Fig 3: Turning Oil Suction Pump Gearwheel

Courtesy of BMW OF NORTH AMERICA, INC.

Set special tool 11 6 251 to zero.

Turn oil suction pump gearwheel (1) in direction of arrow to stop.

Fig 4: Turning Oil Suction Pump Gearwheel

Courtesy of BMW OF NORTH AMERICA, INC.

Backlash on oil suction pump min. 0.06 to max. 0.08 mm.

If necessary, correct oil suction pump adjustment.

Fig 5: Measuring Oil Suction Pump Backlash

Courtesy of BMW OF NORTH AMERICA, INC.

Adjust oil suction pump (2) with a rubber mallet on pump housing in direction of arrow.

Tightening torque 11 41 3AZ .

Fig 6: Adjusting Oil Suction Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.