Page 329 of 1002

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- When reinstalling seal carrier to crankcase:
Check locating sleeves for damage.
Replace gasitet between rear main seal carrier and
cranlt-
case.
Apply thin coat of
3 Bond 8 1209 or equivalent sealant to
oil pan
gasltet sealing surfaces.
* Lubricate crankshaft and seal contact surfaces.
4 Use BMW special tool 11 2 390 as an installation guide in fit-
ting seal over end of cranltshaft. Use care to push seal carrier
and support bushing on straight, without tilting. Remove in-
stallation guide carefully.
- Replace sealing washers under seal carrier mounting bolts.
- Install seal carrier mounting bolts and torque to specilica-
tions.
- lnstall oil pan bolts.
- Remainder of assembly is reverse of disassembly.
Install flywheel using new bolts,
Install clutch or torque converter and transmission.
* Fill engine with oil.
Run engine and
checlt for leaks.
Tightening torques Flywheel to crankshaft (use new bolts)
120 Nm (89 ft-lb)
011 dra~n plug to 011 pan (M12) 25 Nm (18 ft-lb)
Oil pan to
eng~ne block
M6 (8.8 grade) 10 Nm (89 in-lb)
M6 (1 0 9 grade) 12 Nm (9 ft-lb)
M8 (8.8 grade) 22 Nm (16 ft-lb)
Rear main seal carrier to crankcase
M6 10 Nrn (89 in-lb)
ME 22 Nm (16 ft-lb)
Page 331 of 1002
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Lubrication system/
4 Install engine lifting tool at front of engine and raise engine
approximately
5 mm (114 in).
< Remove pinch bolt (arrow) at steering column universal joint
near steering rack. See
320 Steering and Alignment.
- Remove power steering pump, leaving hydraulic lines con-
nected to pump. Suspend pump using strong wire. See
320
Steering and Wheel Alignment.
NOTE-
For better access to power steering assembly, unbolt fluid
reservoir and suspend with wire.
Loosen upper nuts (arrow) in right and lefl engine mounts,
< Remove right and left lower engine mount nuts (arrow)
- On cars with automatic transmission, remove ATF cooler line
brackets from engine oil pan.
- Disconnect electrical harness connector at oil level sensor on
oil pan.
Page 337 of 1002
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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.
Page 360 of 1002

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120-1 2
ignition System
Crankshaftspeedsensor
Crankshaft speed sensor, replacing (M52, M52 TU and
M54 engines)
4 Crankshaft speed sensor for 6-cylinder engine is mounted in
the left rear side of the cylinder block below the starter (ar-
row). The sensor reads a toothed pulse wheel mounted to
the end of the crankshaft.
- if the Engine Control Module (ECM) does not receive a signal
from the crankshaft speed sensor during cranking, the en-
gine will not start.
- If the OBD II svstem misfire detection ~rotocol detects a cat- - - ~~
alysr oarnagin; faLlt oJe to a ma I-nclion in crandshafi speeo
sensor components. Ine Check Engine
lignr (Malfuncrion In-
dicator Light or MIL) will be illuminated.
NOTE-
If the crankshaft speed sensor pulse wheel is damaged, the
engine will have to be disassembled down to the crankshaft
to
reolace the wheel.
- Make certain ignition has been turned off.
- Raise car and support in a safe manner.
WARNING -
Make sure the car is stable and well supported at all times.
Use a professional automotive lift orjacltstands designed for
the ouroose.
A floor iaclc is not adequate support.
- Remove under engine splash guard
4 Working underneath starter:
Cut off wire tie securing crankshaft speed sensor harness
connector (arrow) to sensor.
* Disconnect harness connector.
4 Remove sensor mounting fastener (arrow) and remove sen-
sor from cylinder block.
- Installation is reverse of removal, noting the following:
Use a new O-ring when installing sensor.
Be sure wiring is routed in same orientation.
Secure sensor using new wire ties.
Use scan tool to read out and clear ECM fault memory.
Page 361 of 1002

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ignition System
Crankshaft speed sensor, replacing (M62 and M62TU
engines)
The crankshaft speed sensor reads a toothed pulse wheel
mounted on the flywheel.
If the Engine Control Module(ECM)
does not receive an impulse signal from the crankshaft speed
sensor during
cranking, the engine will not start. If the OBD II
system misfire detection protocol detects a catalyst damag-
ing fault due to a malfunction in the crankshaft speed sensor
components, the Check Engine light (Malfunction
Indicator
Light or MIL) will be Illuminated.
4 The crankshaft speed sensor (arrow) is mounted in the right
lower side of the bell housing.
- Remove speed sensor by disconnecting electrical harness
connector and unbolting sensor from bell housing. Do not
discard shims, if present.
- Installation is the reverse of removal. Clean mounting surface
before installing new sensor, and install shims, if present.
< If the flywheel was replaced, the speed sensor must be
checked for correct installation depth.
* Crank engine in direction of rotation using crankshaft bolt
until a full pulse tooth is centered in the opening for the re-
moved speed sensor.
Measure depth ro top of tooth from speed sensor p~lse
generator mounting s~rface on transmission.
4 Measure length of pulse generator from mounting surface to
end (A).
- Subtract length of pulse generator (A) from distance to pulse
tooth from mounting area on transmission. This measure-
ment is the gap between the pulse sensor and flywheel. Use
shims available from BMW to increase gap as needed to
reach specification.
Pulse sensor
gap
End of sensor to flywheel teeth 0.55 + 0.2 rnrn
(0.0217 t 0.008 in)
Page 387 of 1002

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Battery, Starter, ~lternatorl
- Disconnect wiring from starter.
4 Note routing for cables. Routing varies depending on model
and transmission. When reinstalling, make sure cables do
not chafe.
- Using a long extension and universal joint from output end of
transmission, remove bolts fastening starter to transmission
bell housing and engine block.
- Remove starter from below
4 Checlc starter pinion gear and flywheel teeth for damage.
- Installation is reverse of removal.
Tightening torques
Starter to engine 47 Nrn (35 It-lb)
Starter sipport bracket to starter 5 Nrn (44 in-lb)
Starter support
bracket to engine 47 Nrn (35 ft-lb)
Wlre terminals to slarter
M5 5 Nrn (44 in-lb)
M6 7 Nrn (62 in-lb)
M8 13 Nrn (10 ft-lb)
Starter, removing and installing
(V-8 engine)
The starter is on the right (passenger) side of the engine, and
is removed from below. Access to starter bolts is difficult. Be
sure to have the proper tools on hand before proceeding.
- Disconnect negative (-) battery cable
CA UTIOW-
Prior to disconnecting the battery, read the battev discon-
nection cautions in
OOlGeneral Cautions and Warnings. -
- Raise vehicle and support safely.
/ WARNING- 1 ~ ~~ ~~ ~~~ ~
Make sure the car is stable and well supported at all times.
Use a professional automotive lift orjacltstands designed for
I the purpose. A floor jack is not adequate support I
Page 388 of 1002
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-
Battery, Starter, Alternator
- Working underneath car, remove engine splash shield.
- Remove heat shield from starter.
Remove starter wire mounting nuts (arrows). Disconnect
wires from starter terminals and retaining clip.
Disconnect main positive cable and bracket from suspen-
sion.
If necessary for access, remove right side oxygen sensor
harness connector from retaining clip.
Working from end of transmission, use suitable extensions
and universal joint to remove starter mounting bolts (arrows)
at transmission bellhousing.
- Remove starter from below.
- Check starter pinion gear and flywheel teeth for damage.
- Installation is reverse of removal
Tightening torques Starter
to engine 47 Nrn (35
ft-lb)
Wire terminals to starter
M5 5 Nrn (44 in-ib)
M6 7 Nm (62 in-ib)
ME 13 Nrn (10 ft-lb)
Page 406 of 1002

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I Fuel Injection
Release injector locking clips at each injector and pry injector
wiring duct up off injectors.
Clamp off fuel supply line and fuel return line at end of fuel
rail. Disconnect fuel supply fuel return lines from fuel rail.
WARNING -
Clamp off the fuel lines and then wrap a clean shop towel
around the lines before removing them. Residual
fuelpres-
sure is present in the lines.
Fuel is discharged. Do not disconnect any wires that
could cause electrical
sparks. Do not smoke or work
near heaters or other fire hazards. Keep an approved
I fire extinguisher handy. I
- Remove fuel rail mounting fasteners
- Pull up on fuel rail and remove individual injectors by remov-
ing injector retaining clip and pulling injector from rail.
- Installation is reverse of removal. Fit new O-rings when in-
stalling injectors. For ease of installation, lightly lubricate in-
jector O-ring with
SAE9O gear lube.
Tightening torque Fuel rail to
intake manifold 10 Nm (89 in-lb)
Evaporative emissions, overview
On E39 MS 41 .I cars, the evaporative emissions system is
combined with the tank ventilation system. The evaporative
system is monitored by the ECM for correct purge operation
and leak detection.
The carbon (purge) canister is purged using engine vacuum
via the
purgevalve.The purgevalve (located nextto the mass
airflow sensor) is ECM controlled and regulates the purge
flow into the intake manifold. The valve is powered open and
closed by an internal spring.
If the evaporative emission valve circuit is faulty, a fault code
is set and the MIL is illuminated when OBD
II fault criteria are
exceeded. If the valve is mechanically faulty, poor driveability
may result and a mixture adaptation fault is stored in the
ECM.
The leak diagnosis pump (LDP) is activated by the ECM and
pressurizes the fuel tank and evaporative system as apart of
theOED I1 leakdetection monitor. If the LDP orthe LDP circuit
is defective, afault code is set and the MIL is illuminated when
OBD
I1 fault criteria are exceeded. The LDP is mounted the
left rear wheel well behind the fender liner.