2001 BMW 525i lubrication

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[Lubrication System
< Disconnect electrical harness connector (arrow) at oil level
sensor.
< Remove lower oil pan mounting bolts (arrows)
CAUTIOI\C
If the lowerpan does not separate easily from upperpan, a
few taps with a rubber mallet should break it free. Do
notpry
the oil pan loose.
- When installing oil pan:
Thoroughly clean all old
gasltet material from mating sur-
faces and use a new gasket.
4 Install threaded guide studs at locations marked by arrows
to guide new oil pan
gasltet and oil pan into position and to
prevent damage to sealing lip.
- Install new oil pan mounting bolts (threads coated with
sealer).
Remove guide studs and install remainder of oil pan bolts.
- Remainder of reassembly is reverse of disassembly
- After adding engine oil, start and run engine. Raise engine
speed to 2,500 rpm until oil pressure warning light goes out
(about 5 seconds).
Tightening torques Lower oil pan to upper
oil pan
M6 (8.8 grade) 10 Nm (89 in-lb)
M6 (10.9 grade) 12 Nm (9 ft-lb)
M8 (8.8 grade) 22 Nm (16 ft-lb)
Oil drain plug to oil pan (M12) 25 Nm (18 ft-lb)

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... . . Lubrication sy=
Upper oil pan, removing and installing (V-8)
The engine oil pan removal procedure requires that the en-
gine be supported from the top and the front suspension
sub-
frame be lowered.
- Disconnect negative (-) battery cable
4 Lift hood into assembly position.
- While supporting hood, disconnect support struts.
Open hood
fully and lock in piace by installing bolts
(arrow) in left and right hinges to lock hood in place
4 Remove engine top cover:
- Early version: Pry off caps (arrows) and remove fasteners.
Late version: Depress fasteners (arrows) and lift cover.
4 Remove air filter housing and mass air flow sensor:
Disconnect mass air flow sensor
(A) and intake air temper-
ature sensor
(B) electrical harness connectors.
Remove air filter housing mounting fastener (arrow)
Loosen
intake hose clamps (C and D).
Remove air filter housing with mass air flow sensor.
Remove intake hose from throttle body.

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Lubrication System - - -- . - I
< Remove oil dipstick support from right cylinder head.
4 Remove upper nuts (arrow) from left and right motor mounts.
4 Attach BMW special tool 00 0 200 with tools
i\ 201/202R04/208 (engine suppon bracket).

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1 19-1 7
Lubrication System
Disconnect electrical harness connect01
sensor.
. (arrow)
4 Remove lower oil pan bolts (arrows) and pan, oil
level
CAUTION-
If the lowerpan does not separate easily from upperpan, a
few taps with a rubber mallet should break it free. Do not pry
the oil pan loose.
Remove
NC drive belt tensioner.
Remove adjustment bolt
(B).
Remove retaining bolt (A) and remove tensioner from oil
pan.
- Remove power steering pump from engine block, leaving hy-
draulic lines connected. Suspend from chassis using stiff
wire. See
320 Steering and Wheel Alignment.

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119-18
I Lubrication System
4 Working at lefl side of engine, remove oil dipstick guide tube 1 mounting bracket and remove dipstick tube.
NOTE-
Replace dipstick O-ring seal.
< Working at right side of engine, remove oil return line from
upper section of oil pan.
4 Separate lower steering column from steering box:
Remove retaining bolt
(arrow) from lower steering column
universal joint.
Slide lower steering column up and off of connection at
steering box.
- Remove support bracket for hydraulic line at subframe.

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Lubrication ~vsternl
Support subirame from below using BMW special tool 31 2
220 and appropriate shop lift.
Remove subirame mounting bolts (arrows) and lower
frame as far as possible. sub-
< Working through
lower oil pan opening, remove pump mount-
ing bolts (arrows).
Remove oil pump. See Oil pump, removing and install-
ing
(V-8).

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/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)

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Lubrication System
- Lower front suspension and remove oil pan, as described
earlier, to gain access to oil pump.
Remove oil pump
sprocket mounting nut (left-hand thread)
(arrow). Lift sprocket off together with drive chain.
Engines produced to 9/98: Remove oil pump with pick-up
tube. Pick-up tube is bolted to side of oil pump.
Engines produced from 9/98 to 01/00: Remove pick-up
tube, scraper tray and oil pump as a unit.
Engines produced from 01/00: Remove oil pump pick-up
tube bolts and remove pick-up tube before removing pump.
Remove mounting bolts from oil pump. Withdraw pump.
NOTE-
Record location of any spacers between pump and engine
bloclc Note positions of locating dowels.
- Remove cover from oil pump and check for wear or scoring.
Spin oil pump shaft and
check that gears turn smoothly. Re-
place pump if gears spin with difficulty
orany wear is present.
- Inspect oil pressure relief valve as described later.
- Installation is reverse of removal, noting the following:
Replace pick-up tube O-ring (if applicable).
- Align sprocket splines to oil pump shaft spl~nes before
tightening sprocket nut.
- After adding engine oil, start and run engine. Raise engine
speed to 2,500 rpm until oil pressure warning light goes out
(about 5 seconds).
Tightening torques Oil drain plug to oil pan 25
Nm (18 ft-lb)
Oil pan to engine
bloclc
M6 (8.8 grade)
M6 (10.9 grade)
M8 (8.8 grade)
10 Nm (89 in-lb)
12
Nrn (9 ft-lb)
22 Nm (16 ft-lb)
Oil pump sprocket to oil pump shait
(M10 x 1) (left hand thread)
25 Nm (1 8 it-lb)
Oil pump to crankcase (ME) 22 Nm (1 6 it-lb)
Oil pump pickup tube to cranltcase (M6) 10 Nm (89 in-lb)