1997 BMW 528i Tightening torque

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I General Warnings and Cautions
WARNINGS (continued)
. The air conditioning system is filled with chemical refrigerant,
which is hazardous. The AIC system should be serviced only by
trained technicians using approved refrigerant recoverylrecycling
equipment, trained in related safety precautions, and familiar with
regulations governing the discharging and disposal of automotive
chemical refrigerants.
. Do not expose any part of the AIC system to high temperatures
such as open flame. Excessive heat will increase system pres-
sure and may cause the system to burst.
Some aerosol tire inflators are highly flammable. Be extremely
cautious when repairing a tire that may have been inflated using
an aerosol tire inflator. Keep sparks, open flame or other sources
of ignition away
from the tire repair area. Inflate and deflate the
tire at least four
times before breaking the bead from the rim.
Completely remove the tire from the rim before attempting any re-
pair.
Cars covered by this manual are equipped with a supplemental
restraint system (SRS), that automatically deploys
airbags and
pyrotechnic seat belt tensioners
In the event oi a frontal or side
impact. These are explosive devices. Handled improperly or with-
out adequate safeguards, they can be accidently activated and
cause serious injury.
- The ignition system produces high voltages that can be fatal.
Avoid contact with exposed terminals and use extreme care when
working on a car with the engine running or the ignition switched
on.
. Place jack stands only at locations specified by the manufacturer.
The vehicle
illtino iack su~olied with the vehicle is intended fortire -. , . changes only. A heavy duty floor jack should be used lo lift vehicle
before installing
jacl( stands. See 010 General.
- Battery acid (electrolyte) can cause severe burns. Flush contact
area
with water, seek medical attention.
Aerosol cleaners and solvents may contain hazardous or deadly
vapors and are highly flammable. Use only in a well ventilated ar-
ea. Do not use on hot surfaces (engines, brakes, etc.).
Do not remove
coolant reservoir or radiator cap with the engine
hot. Danger of burns and engine damage.
CAUTIONS-
See also WARNINGS
- if you lack the slqills, tools and equipment, or a suitable worl(shop
for any procedure described in this manual, leave such repairs to
an authorized BMW dealer or other qualified shop.
BMW is constantly improving its cars and sometimes these
changes, both in parts and specifications, are made applicable to
earlier models. Therefore, part numbers listed in this manual are
for reference only. Always check with your authorized BMW deal-
er parts department for the latest information.
Before starting a job, make certain that you have all the neces-
sary tools and parts on hand. Read ail the instructions thorough-
ly, and do not attempt shortcuts. Use tools appropriate to the
work and use only replacement parts meeting BMW specifica-
tions.
Use pneumatic and electric tools only to loosen threaded parts
and fasteners. Never use these tools to tighten fasteners, espe-
cially on light alloy parts. Always use a torque wrench to tighten
fasteners to the tightening torque specification listed.
Be mindful of the environment and ecology. Before you drain the
crankcase, find out the proper way to dispose of the
oil. Do not
pour
oil onto the ground, down a drain, or into a stream, pond or
lake. Dispose of waste in accordance with Federal, State and
Local laws.
The control module for the anti-lock brake system
(ABS) cannot
withstand temperatures from a paint-drying booth or a heat
lamp
in excess of 203" F (95°C) and should not be subjected to tem-
peratures in excess of 185°F
(8S°C) for more than two hours.
- Before doing any electrical welding on cars equipped with ABS,
disconnect the battery negative
(-) terminal (ground strap) and
the ABS control module connector.
- Always make sure ignition is off before disconnecting battery.
Label battery cables before disconnecting. On some models, bat-
tery cables are not color coded.
Disconnecting the battery may erase fault code@) stored in control
module memory. Using special BMW diagnoslic equipment, check
lor
iauit codes prior to disconnecting the battery cables. If the mal-
I.mct on ndicator Ignt (MIL) s I. ..minaled. see OBD On-Board
Diaanostics
Tl11s iant is iuenlfted as lne Check Ena~ne oht
(1997-2000 models jor~ervlce Engine Soon light (2061 andlater
models). If any other system iaults have been detected (indicated
by an illuminated warning light), see an authorized BMW dealer.
If a normal
or rapid charger is used to charge battery, the battery
must be disconnected and removed from the vehicle in order to
avoid damaging the vehicle.
- Do not quick-charge the battery (for boost starting) for longer
than one minute. Wait at least one minute before boosting the
battery a second time.
* Connect and disconnect a battery charger only with the battery
charger switched off.
- Sealed or "maintenance free" batteries should be slow-charged
only, at an amperage rate that is approximately 10% of the bat-
tery's ampere-hour (Ah)
rating.
. Do not allow battery charging voltage to exceed 16.5 volts. If the
battery begins producing gas or boiling violently, reduce the
charging rate.
Boosting a sulfated battery at a high charging rate
can cause an explosion.

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01 0-1
010 General
General ........................... .01 0.2
How to Use this Manual ............ .01 0.2
Warnings. cautions and notes ........... .0l 0.3
Getting Started .................... .0i 0.5
Safety ............................. .O1 0.5
Lifting the car ........................ .O1 0.5
Raising car ......................... .O1 0.5
Working under car .................... .O1 0.6
Advice for the Beginner ............ .O1 0.7
Planning ahead ...................... .O1 0.7
Workshop practices ................... .O1 0.7
Non-reusable fasteners ................ .O1 0.7
Tightening fasteners .................. .O1 0.8
Gaskets and seals .................... .O1 0.9
Electrical testing .................... .O1 0.10
Wire repairs ........................ .O1 0.10
Buying Parts ..................... .01 0.11
Genuine BMW parts ................. .O1 0.11
Non-returnable parts ................. .O1 0.11
Information you need to know .......... .0l 0.12
Service ........................... 01 0-1 3
TOOIS ............................. 010-13
Basic tool requirements ............... 01 0-1 4
Jack stands ......................... 01 0-1 6
Oil change equipment ................. 01 0-1 6
Torque wrench ...................... 01 0-17
Digital multimeter .................... 010-17
BMW special tools ................... 01 0-1 8
Emergencies ...................... 01 0-1 8
Changing a tire ...................... 01 0-1 8
Jump starting ....................... 01 0-1 9
Indicator and warning lights ............ 01 0-1 9
Towing ............................ 010-20
Spare parts kit ...................... 010-21

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General Tightening fasteners
When tightening the bolts ornuts on acomponent, it is always
good practice to tighten the bolts gradually and evenly to
avoid misalignment or over-stressing any one portion of the
component. For components sealed with gaskets, this meth-
od helps to ensure that the
gasket will seal properly.
WARNING
-
Table a: General bolt tightening torques in Nm (max.
permissible) is
a general reference only The values listedin
the table are not intended to be usedas a substitute for tor-
ques specifically called out in the text or in manufacturer's in-
formation.
4 Where there are several fasteners, tighten them in a se-
NOTE-
* Metric bolt classes or grades are rnarlced on the bolt head.
* Do not confuse wrench size with bolt diameter. Fora listing
of the common wrenches used on various bolt
diameters,
see Basic tool requirements.
2 BOO~FNG
quence alternating between opposite sides of the compo-
nent. Repeat the sequence until all the bolts are evenly
tightened to the proper specification.
For some repairs a specific tightening sequence is
neces-
sary, or particular order of assembly is required. Such special
conditions are noted in the text, and the necessary sequence
is described or illustrated. Where no specific torque is listed,
Table
a: General bolt tightening torques in Nm (max. per-
missible) can be used as a general guide for tightening fas-
teners.

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General
Table a. General bolt tightening torques in Nm
(max. permissible)
Bolt Class (according to DIN
267)
Gaskets and seals
Gasket aredesigned to crush and become thinner as the mat-
ing parts are bolted together. Once agasket has been used, it
is no longer capable
;f malting as good a seal as when new,
and is much more likely to leak.
Forthis reason, gaskets
should not be reused.
Some gaskets and seals are
d~rectional. Make sure thatthese
are
~nstalled correctly. In places where a shaft must pass
through a housing,
flex~ble lip seals are used to keep the lubri-
cating
011 or grease from leaking out past the rotatlng shaft.
Seals should never be reused once they have been removed.
When
rernovlng a seal, be careful not to damage the metal
surfaces.
The ltey to seal installation is to get the seal in straight without
damaging it. Use a seal driver that is the same diameter as
the seal housing to gently and evenly install into place.
If a
proper size seal driver is not available, a socket of the right
size will do.
Some seals are directional and special installation instruc-
tions apply. Make sure a seal is installed with the lip facing the
correct way. Note the installation direction of the old seal be-
fore removing it.

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General
Cars with discharged or dead batteries can be jump-started
using the good battery from another car. See owner's manual
for proper instruction on jump starting. When jump-starling
the engine, always note the following warnings.
4 Lower car. With all wheels on ground, fully tighten nuts in a
WARNING-
* Battery acid (electrolyte) can cause severe burns, and will
damage the
cal; clothing, and you. If electrolyte is spilled,
wash the surface with large quantities of water.
M itgets into
eyes, flush them with water for several minutes and call a
doctor.
B4
5
43
2 BOOIFNG.
Batteries produce explosive and noxious gasses.
Keeps sparks and flames away. Do not smoke near
batteries.
Do notjump-start the engine
ifyou suspect that the bat-
tery is frozen. Trappedgas may explode. Allow the bat-
tery to thaw first.
Do not quick-charge the battery (for boost starting) for
longer than one minute, and do not exceed
16.5 volts
at the battery with the boosting cables attached. Wait at
least one minute before boosting the battery a second
time.
crisscross pattern.
Torque wheel nuts when installing wheel.
Check inflation pressure of spare tire.
Tightening torque
Wheel to wheel hub 120 Nm (89 ft-ib)
Jump starting
Indicator and warning lights
Many vehicle systems are self-monitored for faults while driv-
ing. Generally,
a red warning lamp that comes on during driv-
ing should be considered serious. If you cannot immediately
determine the seriousness of the warning light, stop the vehi-
cle in a safe place and turn the engine off as soon as possible.
Consult the owner's manual for additional information on the
warning lamp and the recommended action.
If the Malfunction Indicator Lamp (MIL)
(Check Engine or Ser-
vice Engine Soon warning light) comes on orflashes, it indi-
cates that an emissions-related fault has occurred. Faults
such as a bad oxygen sensor or a dead fuel injector can
cause the exhaust or evaporative emissions to exceed a
specified limit. When these limits are exceeded, the MIL will
be turned on. The engine can be safety driven with the light
on, although the emission systems should be
checked as
soon as possible. See OBD On-Board Diagnostics for

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020-1 4
Maintenance
- When oil flow has diminished to an occasional drip, reinstall
drain plug with a new metal sealing washer and torque plug.
Tightening torque Engine oil drain plug to oil pan
25 Nrn (1.8 ft-lb)
6-cylinder oil filter assembly
r------ 1
< Working at oil filter housing (1):
Lubricate and install new oil filter O-rings (3, 4).
Install a new filter cartridge (5).
lnstall and tighten housing cover (2).
6-cylinder oil filter assembly shown, V-8 is similar.
Tightening torque Cover to oil filter housing
25 Nm (1.8 it-lb)
- Refill crankcase with oil. Approximate oil capacity is listed in
Tabled. Engine oil with filter change. Use dipstick to
check correct oil level.
- Start engine and check that oil pressure warning light
immediately goes out.
- Allow engine to run fora few minutes to circulate new oil, then
check for leaks at drain plug and oil filter. Stop engine and re-
check oil level
The section describes other routine maintenance done in the
engine compartment. Information on engine oil service is
giv-
enkar~ier inthis group.
For these procedures, it is not necessary for the car to be
raised and supported off the ground.
Accelerator and linkage
The accelerator and linkage at the throttle housing should be
lubricated periodically. Use ageneral purposeoil on the joints
and bearings of the linkage. Use a multipurpose grease on
the bearing points of the throttle plate.
Air filter, replacing
The specified replacement intervals forthe air filter are based
on normal use. If the car is operated primarily in dusty
conditions, the air filter should be serviced more frequently.

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Maintenance
< Remove NC compressor belt:
Loosen tensioner mounting fasteners (arrows)
Swing tensioner down to remove belt.
4 To reinstall compressor belt:
Route belt over pulleys.
* Pretension belt by turning adjuster clockwise (arrow) to
stop.
- Tighten tensioner mounting bolts (A).
Tightening torques
Fan clutch to coolant pump (left- hand thread)
with BMW tool
11 5 040
30 Nm (22 ft-lb)
without BMW tool 11 5 040
40 Nm (29 ft-lb)
Tensioner to engine block
8.8 grade
22 Nm (16 ft-lb)
10.9 grade (Ilquid-cooled alternator) 30 Nm (22 ft-lb)
Idle speed
Engine idle speed can change due to a number of factors, in-
cluding normal wear. The idle speed is electronically adaptive
and not adjustable. See
130 Fuel Injection for more informa-
tion.
Catalytic converter and oxygen sensors
OBD II enhanced emission standards require the engine
control module (ECM) to monitor the oxygen content in the
exhaust with oxygen sensors placed before and after the cat-
alytic converter. This allows for tighter control of tail pipe
emissions and also allows the ECM to diagnose converter
problems. If the ECM detects that catalytic converter or oxy-
gen sensor efficiency has degraded past a certain
prepro-
grammed limit, it will turn on the malfunction indicator light
(MIL), and store a diagnostic trouble code (DTC) in the ECM.
See OBD On-Board Diagnostics for more information on
OBD
ll systems.
Replacement of oxygen sensors at the specified intervals
he engine and emission control system will

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Maintenance
continue to operate as designed. Extending the replacement
interval may void the emission control warranty coverage.
See
180 Exhaust System for information on replacing the
oxygen sensors.
Tightening torque
Oxvoen sensor to exhaust
manifold 50 Nrn (37 ft-lb)
NOTE-
A special soclet for replacing the oxygen sensor is available
from most automotive parts stores. The soclet has
a groove
cut down one side to allow the sensor to be installed without
damaging the wire harness.
Power steering fluid, checking level
The power steering system is permanently filled and does not
have a drain. Routinely adding ATF is not required unless the
system is leaking.
4 To check power steering fluid level in fluid reservoir:
Park car on level ground with engine off.
Level is correct
if it is between MlN and MAX marks on
dipstick.
If level is below
MlN mark, add fluid to reservoir to bring
level up.
* Hand-tighten reservoir cap.
Power steering fluid
Dexron
1iiO ATF or equivalent
Spark plugs
E39 models through model year 1998 were equipped with
spark plugs with two electrodes. These are gapped to
0.7 mm
(0.028 in) by the manufacturer and are not adjustable.
Starting with 1999 models, long life spark plugs with
3 or four
electrodes were used. These can be retroactively fitted to
earlier
models. The recommended spark plug replacement
interval
forthese is 100,000 miles.The electrode gap in these
spark plugs is not adjustable.
Spark plug applications
M52 Bosch FBLDCR
M52 TU, M54 Bosch FGR7DQP or NGK BKRBEQUP
M62 to 7/97 Bosch F7LDCR or NGK BKR6EK
M62 from 7/97 Bosch F9LDCR
M62 TU Bosch FGR7DQP or NGK BKRGEQUP