Oil Pump. Removing And Installing (6-Cylinder) - BMW 5251 Service Manual

/Lubrication
System
Oil pump, removing and installing
(&cylinder)
Oil pump assembly
(6-cylinder from 9/98)
CAUTIOI\C
Oil pump sproclcet nut has left-hand threads. Turn clockwise
to loosen.
4
Version 1, M52 oil pump assembly.
1. Oil pump pressure relief control valve
2. Oil pump suction tube
3. Suction tube support bracket
4.
Oil pump assembly
5. Oil pump drive sprocltet
6. Oil pump drive chain
7. Oil pump drive sprocket nut (left hand threads)
4
Version 2, M52 TU oil pump assembly.
1. Oil pump pressure relief control valve assembly
2. Oil pump suction pick-up and seal
3. Oil pump
4. Oil pump drive sprocket
5. Oil pump shaft locking nut (left-hand thread)
6.
Oil pump drive chain
Version 3, M54 oil pump assembly,
1. Drive chain
2.
MlO
x 1 nut
Tighten to 25 Nm (18 ft-lb)
3. Oil pump sprocket
4. Inner pump rotor
5. Outer pump rotor
6. Oil pressure relief valve assembly
7. M8 bolt.
Tighten to 23 Nm (17 it-lb)
8. Oil pump housing
9. Locating dowels
10. Pickup tube sealing O-ring
11. Pickup tube
12. M6 pickup tube mounting bolts
Tighten to 10 Nm (89 in-lb)