1998 BMW 528i Air

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Exhaust system1
Exhaust manifold removal procedures are organized accord-
ing to engine code. If necessary, see
100 Engine-General
for engine code and application information.
Exhaust manifolds, removing and installing
(M52 engine)
4 Exhaust manifolds for the M52 engine.
Always use new retaining nuts and gaskets when removing
and installing the exhaust manifolds.
- With exhaust system cold, raise and support car for access
to exhaust system.
WARNING -
Do not work under a lined car unless it is solidly supported on
jack stands designed for that purpose. Never work under a
car that is supported solely by a jack.
- Disconnect secondary air check valve and pipe from exhaust
manifold.
- Unbolt front exhaust pipe@) from exhaust rnanifold(s)
- Remove exhaust support bracket from transmission.
- Loosen and remove nuts from exhaust manifolds and remove
manifolds. Discard nuts and gaskets.
NOTE-
On cars with oxygen sensors mounted in the exhaust mani-
folds, use care when removing manifolds.
To be safe, remove
the sensors from the manifolds before removing manifolds.
- Installation is reverse of removal
Coat exhaust manifold mounting studs with copper paste
before installing new nuts.
Install manifold gaskets with arched side facing manifolds.
Tightening torque
Exhaust manifolds
to cylinder head 20 Nm (15 ft-lb)

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180-6
Exhaust System
Exhaust manifolds, removing and installing
(M52 TU and M54 engines)
I Exhaust manifolds with converters I 4 The exhaust manifolds incorporate the catalytic converters.
Two precatalyst and two post-catalyst oxygen sensors are
mounted in the exhaust manifold assembly.
Under normal conditions, the catalytic converters do not re-
quire replacement unless damaged. Always use new retain-
ing nuts and gaskets when removing and installing the
exhaust manifolds.
I\
1 4 Using engine support equipment (BMW special tools 00 0
200. 00 0 201. 00 0 202.00 0 204.00 0 208 or equivalent).
connect to
lifting eye on front of engine. Rhise engine approx.
/I 1
5 mm (IH in).
With exhaust system cold, raise and support car for access
to exhaust system.
WARNING-
Do not worlc undera liftedcar unless it is solidly supported on
jack stands designed for that purpose. Never worlc under
a
car that is supported solely by a jaclc.
in order to avoid damaging oxygen sensors:
- Detach oxygen sensor harness connectors,
Remove oxygen sensors from exhaust manifolds as de-
scribed later in this group.
Unbolt and remove secondary air
checkvalve and pipe from
right front of cylinder headlexhaust manifold.
Working underneath car, unbolt front exhaust pipes from ex.
haust manifolds.
With engine supported from above, remove right engine
mount
bracket and right engine mount (arrow).
Loosen and remove nuts from exhaust manifolds and remove
manifolds. Discard nuts and gaskets.
CA UTIOG
Take care tliat the front and rear oxygen sensor connectors
are not mixed up.
-

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-- -
Exhaust System
Oxygen sensors (precatalyst), replacing
(M52 TU and M54)
The precatalyst oxygen sensors are installed at the top of the
exhaust manifolds.
WARNING-
Allow components to cool before servicing.
- Using BMW scan tool DlSplus (Diagnostic Information Sys-
tem) or equivalent, read out and clear ECM fault codes.
Working at right side of engine above exhaust manifolds,
remove front or rear oxygen sensor harness connector
(arrows) from bracket, then separate plug.
NOTE-
In photo, secondary air pump has been removed for clarity.
Remove oxygen sensor using special oxygen sensor
removal socket.
Installation is reverse of removal
New sensor threads come coated with anti-seize paste.
If reusing a sensor, apply thin coat of anti-seize paste to
threads only. Do not contaminate tip of sensor with paste
or lubricants of any sort.
Install harness and connector in original location.
Tightening torque
- -.
Oxygen sensor to manifold 50 Nm (37 ft-lb)
Oxygen sensors (post-catalyst), replacing
(M52 TU and M54)
The post-catalyst oxygen sensors are installed at the rear of
the catalytic converters.
WARNING-
Allow components to cool before servicing
- Using BMW scan tool DlSplus or equivalent, read out and
clear ECM fault codes.
- Remove large cover from above fuel raillintake manifold.

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This repair group covers general application information for
the clutch, manual and automatic transmissions, shift linkag-
es and driveshaft.
Drivetrain
I ZF manual transmission I
BMW E39 models are equipped with a longitudinal drivetrain.
The transmission is bolted directly to the rear of the engine.
A
driveshaft connects the output shaft of the transmission to the
rear final drive. Individual drive axles with integrated constant
velocity joints transfer rotational power from the final drive
unit to the rear wheels.
4 Due to different power characteristics and performance re-
quirements, various manual transmissions are used in mod-
els covered by this manual. Manual transmission
applications are given in the table below.
For manual transmission specifications or repair procedures,
refer to
230 Manual Transmission.
Manual transmission models use a single disc clutch with
dual-mass flywheel. For further information, see
210 Clutch.
The manual transmission metal ID plate is mounted on side of
transmission. Do not rely on numbers cast on transmission
case for identification.
Manual transmission applications
Model Year Engine Transmission
5251 2001 - 2002 M52TU, M54 Getrag S5D 250G
528i 1997-2002 M52 ZF S5D 3202

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1 Clutch
This repair group covers replacement of clutch mechanical
and hydraulic components.
BMW 5 Series models with manual transmission use a single
disc hydraulically actuated clutch.
Twoversions of the clutch
are used:
1997
5281 (6 cylinder) uses traditional clutch components.
All 540i (V-8) and 1998 and later
6 cylinder models use a
self-adjusting clutch (SAC).
NOTE-
See 200 Transmission-General for transmission applica-
tion information.
Special tools
Some special tools and techniques are required for clutch re-
pairs. Be sure to read a procedure through before beginning a
job.
< Flywheel loclting tool (V-8 models)
1 (Tool NO. 11 2 070)
-
4 Flywheel loclting tool (6 cylinder models)
(Tool No. 1 1 2 170)
- < Pilot bearino removal tools
11 11 2350 < pilot bearing instaation
(Tool No. 11 2 350) tool

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Anach pressure brake bleeder to fluid reservoir and pump
bleeder a few times to pressurize hydraulic fluid system.
CAUTION-
* Do not exceed 2 bar (29 psi) pressure at the fluid resenfoil
when bleeding or flushing the hydraulic system.
Brake fluid is poisonous, highly corrosive and danger-
ous to the environment. Wear safety glasses and
rub-
bergloves when working with brake fluid. Do not siphon
brale fluid with your mouth. Immediately clean away
any fluid spilled on painted surfaces and wash with wa-
ter, as brale fluid will remove paint.
Always use new brake fluid from a fresh, unopened
container.
Brake fluid will absorb moisture from the air.
This can lead to corrosion problems in the clutch and
brake hydraulic systems, ;nd will also lower the brake
fluid boiling point. Dispose of brale fluid properly.
- Raise and safely support vehicle.
WARNING-
Make sure the car is stable and well supported at all times.
Use a professional automotive lift orjackstands designed for
the purpose. A floor
iack is not adequate support.
- If necessary, remove transmission splash shield.
Hydraulic system, bleeding
Worlting underneath transmission, connect a hose from
clutch slave cylinder bleeder valve
(arrow) to a container.
Open bleeder valve and allow bralte fluid to expel until
clean fluid comes out, free of air bubbles.
Close bleeder valve and disconnect pressure bleeding
equipment from fluid reservoir.
Slowly operate clutch pedal about
10 times. Fill reservoir
with clean fluid as necessary.
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21 0-6
1 Clutch
Hydraulic system, bleeding
(using
BMW special tool 21 5 030)
4 Working underneath transmission, remove slave cylinder
mounting nuts (arrow) from clutch housing and remove
cylinder. Leave fluid line attached.
4 Use BMW special tool 21 5 030 to press slave cylinder push-
rod completely into slave cylinder.
Hold slave cylinder so that bleeder valve is at highest point.
Open bleeder valve and allow brake fluid to expel until
clean fluid comes out, free of air bubbles.
* Close bleeder valve and disconnect pressure bleeding
equipment from fluid reservoir.
Slowly unscrew and detach special tool 21
5 030 from
slave cylinder.
CAUTION-
Do not remove tool if hydraulic system is pressurized.
- Reinstall slave cylinder.
Tightening torque Slave cylinder to transmission case
22 Nm (1 6 ft-lb)
- Slowly operate clutch pedal about 10 times. Fill reservoir with
clean fluid as necessary.
Clutch master cylinder, replacing
The clutch master cylinder is mounted to the pedal assembly
directly above the clutch pedal.
Working inside engine compartment, remove left interior
ventilation filter housing:
Release 3 plastic taps
(A) on duct. Earlier models use a
single release latch.
Rotate duct inward to remove
Disconnect electrical harness to hood position switch.
Remove filter housing cover.
Release spring
loclc (B) on interior ventilation housing and
remove housing.

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Clutch, removing
The procedure given here applies to both non-SAC and SAC
clutch assemblies.
- Remove transmission from engine. See 230 Manual Trans-
mission.
4 Loosen 6 clutch mounting bolts (arrows) evenly
- Remove pressure plate and clutch disc.
WARNING-
The clutch disc contains asbestos. Inhaling or ingesting as-
bestos dust can cause severe health problems. Always wear
an approved respiratorandprotective clothing when handling
components containing asbestos. Do not use compressed
air to clean components. Do not
grind, heat, weld, or sand on
or near anv asbestos materials.
Pull release bearing off transmission input shaft. Remove
clutch release lever by sliding it out of spring clip in direction
of arrow.
Clutch components, inspecting
- Inspect clutch disc for wear, cracks, loose rivets, contamina-
tion or excessive
runout (warping). Replace if necessary.
- Measure clutch disc lining thickness at shallowest rivet head. 7
Clutch and pressure plate wear limits
Minimum clutch disc lining thickness (at rivets)
1.0
mm (0.04 in) - Maxtmum lateral runout
(d~aphragm sprtngs to pressure plate) 0 6 mm (0 02 in)