manual transmission BMW 5 SERIES 1989 E34 Workshop Manual

REPAIRS & OVERHAUL
Engine and Associated Systems
In-car engine repair procedures Page 2A•1
General engine overhaul procedures Page2B•1
Cooling, heating and air conditioning systems Page3•1
Fuel and exhaust systems Page 4•1
Engine electrical systems Page5•1
Engine management and emission control systems Page6•1
Transmission
Manual transmission Page7A•1
Automatic transmission Page7B•1
Clutch and driveline Page 8•1
Brakes
Braking systemPage 9•1
Suspension
Suspension and steering systems Page 10•1
Body Equipment
Bodywork and fittings Page 11•1
Electrical
Body electrical systems Page 12•1
Wiring DiagramsPage 12•10
REFERENCE
MOT Test Checks
Checks carried out from the driver’s seat PageREF•1
Checks carried out with the vehicle on the ground PageREF•2
Checks carried out with the vehicle raised PageREF•3
Checks carried out on your vehicle’s exhaust emission system PageREF•4
Tools and Working Facilities Page REF•5
General Repair Procedures Page REF•8
Fault FindingPage REF•9
Conversion factors PageREF•17
Automotive chemicals and lubricants PageREF•18
Buying spare parts and vehicle identification numbers PageREF•19
Glossary of Technical Terms PageREF•20
IndexPage REF•25
Contents

0•4Introduction
The E30 3-Series range first became
available in the UK in March 1983, and
continued in production until April 1991, when
the revised E36 3-Series range (not covered
by this manual) was introduced. Convertible
and Touring (Estate) models were introduced
for 1988, and these models have continued in
E30 form to date.
The E28 5-Series models were introduced
in October 1981, and were superseded in
June 1988 by the revised E34 5-Series range,
Touring versions of which became available
from March 1992. Throughout this manual,
E28 models are also referred to as “old-
shape”, while E34 models are designated
“new-shape”.
The models covered by this manual are
equipped with single overhead cam in-line
four- and six-cylinder engines. Early 316 and
518 models are fitted with carburettors, but all
other models are fitted with fuel injection
systems. Transmissions are a five-speed
manual, or three- or four-speed automatic.
The transmission is mounted to the back of
the engine, and power is transmitted to the
fully-independent rear axle through a two-
piece propeller shaft. The final drive unit is
bolted solidly to a frame crossmember, and
drives the rear wheels through driveshaftsequipped with inner and outer constant
velocity joints.
The front suspension is of MacPherson
strut type, with the coil spring/shock absorber
unit making up the upper suspension link. The
rear suspension is made up of coil spring-
over-shock absorber struts, or coil springs
and conventional shock absorbers,
depending on model.
The brakes are disc type at the front, with
either drums or discs at the rear, depending
on model. Servo assistance is standard on all
models. Some later models are equipped with
an Anti-lock Braking System (ABS).
All models are manufactured to fine limits,
and live up to the BMW reputation of quality
workmanship. Although many of the models
covered by this manual appear complex at
first sight, they should present no problems to
the home mechanic.
Note for UK readers
The greater part of this manual was
originally written in the USA. Some of the
photographs used are of American-market
models, but the procedures given are fully
applicable to right-hand-drive models (or have
been amended where necessary).
Acknowledgements
Thanks are due to Champion Spark Plug,
who supplied the illustrations showing spark
plug conditions. Thanks are also due to
Sykes-Pickavant Limited, who provided some
of the workshop tools, and to all those people
at Sparkford who helped in the production of
this manual. Technical writers who
contributed to this project include Robert
Maddox, Mark Ryan and Mike Stubblefield.
We take great pride in the accuracy of
information given in this manual, but
vehicle manufacturers make alterations
and design changes during the production
run of a particular vehicle of which they do
not inform us. No liability can be accepted
by the authors or publishers for loss,
damage or injury caused by any
errors in, or omissions from, the
information given.
Project vehicles
The main project vehicle used in the
preparation of this manual for the UK market
was a 1988 BMW 318i with an M40/B18
engine.
Introduction to the BMW 3- and 5-Series
BMW 320i Saloon (E30)

0•8Roadside Repairs
Jacking and wheel
changing
The jack supplied with the vehicle should
be used only for raising the vehicle when
changing a tyre or placing axle stands under
the frame.
Warning:Never crawl under the
vehicle or start the engine when
this jack is being used as the
only means of support.
When changing a wheel, the vehicle should
be on level ground, with the handbrake firmly
applied, and the wheels chocked. Select
reverse gear (manual transmission) or Park
(automatic transmission). Prise off the hub
cap (if equipped) using the tapered end of the
wheel brace. Loosen the wheel bolts half a
turn, leaving them in place until the wheel is
raised off the ground.
Position the head of the jack under the side
of the vehicle, making sure it engages with thepocket made for this purpose (just behind the
front wheel, or forward of the rear wheel).
Engage the wheel brace handle and turn it
clockwise until the wheel is raised off the
ground. Unscrew the bolts, remove the wheel
and fit the spare.
Refit the wheel bolts and tighten them
finger-tight. Lower the vehicle by turning the
wheel brace anti-clockwise. Remove the jack
and tighten the bolts in a diagonal pattern to
the torque listed in the Chapter 1
Specifications. If a torque wrench is not
available, have the torque checked by a BMW
dealer or tyre fitting specialist as soon as
possible. Refit the hubcap.
Towing
Vehicles with manual transmission can be
towed with all four wheels on the ground, if
necessary. Automatic transmission-equipped
vehicles can only be towed with all fourwheels on the ground providing that the
speed does not exceed 35 mph and the
distance is not over 50 miles, otherwise
transmission damage can result. For
preference, regardless of transmission type,
the vehicle should be towed with the driven
(rear) wheels off the ground.
Proper towing equipment, specifically
designed for the purpose, should be used,
and should be attached to the main structural
members of the vehicle, not to the bumpers or
bumper brackets. Sling-type towing
equipment must notbe used on these
vehicles.
Safety is a major consideration while
towing. The handbrake should be released,
and the transmission should be in neutral. The
steering must be unlocked (ignition switch
turned to position “1”). Remember that
power-assisted steering (where fitted) and the
brake servo will not work with the engine
switched off.
Jacking, towing and wheel changing

1
Engine
Oil filter
M10 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion C121
M20 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion C160
M30 engines
3-Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion C160
5-Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X115
M40 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X120
Valve clearances (intake and exhaust)
M10 engines
Cold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.20 mm
Hot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 mm
M20 engines
Cold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 mm
Hot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 mm
M30 engines
Cold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 mm
Hot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.35 mm
M40 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic adjusters
Cooling system
Antifreeze mixture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40% antifreeze/60% water
Chapter 1
Routine maintenance and servicing
Air filter renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Automatic transmission fluid and filter change . . . . . . . . . . . . . . . . . 28
Automatic transmission fluid level check . . . . . . . . . . . . . . . . . . . . . 8
Battery check, maintenance and charging . . . . . . . . . . . . . . . . . . . . 13
Brake system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cooling system - draining, flushing and refilling . . . . . . . . . . . . . . . . 29
Cooling system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Differential lubricant change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Differential lubricant level check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Driveshaft gaiter check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Drivebelt check, adjustment and renewal . . . . . . . . . . . . . . . . . . . . . 11
Engine idle speed and CO level check and adjustment . . . . . . . . . . 12
Engine oil and filter change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Engine timing belt renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Exhaust system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Evaporative Emissions Control (EVAP) system check . . . . . . . . . . . 33
Fluid level checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fuel filter renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Fuel system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Manual transmission lubricant change . . . . . . . . . . . . . . . . . . . . . . . 31
Manual transmission lubricant level check . . . . . . . . . . . . . . . . . . . . 16
Power steering fluid level check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Routine maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Service light resetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Spark plug check and renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Spark plug HT leads, distributor cap and rotor - check
and renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Steering and suspension check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Throttle linkage - check and lubrication . . . . . . . . . . . . . . . . . . . . . . 19
Tyre and tyre pressure checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Tyre rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Tune-up general information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Underbonnet hoses - check and renewal . . . . . . . . . . . . . . . . . . . . . 10
Valve clearances - check and adjustment . . . . . . . . . . . . . . . . . . . . 18
Wiper blades - check and renewal . . . . . . . . . . . . . . . . . . . . . . . . . . 27
1•1
Easy,suitable for
novice with little
experienceFairly easy,suitable
for beginner with
some experienceFairly difficult,
suitable for competent
DIY mechanic
Difficult,suitable for
experienced DIY
mechanicVery difficult,
suitable for expert
DIY or professional
Degrees of difficulty
Specifications Contents

Fuel system
Idle speed
3-Series, E30
316 with M10/B18 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850 ± 50 rpm
316i with M40/B16 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 ± 40 rpm
318i with M10/B18 engine (manual transmission) . . . . . . . . . . . . . 850 ± 50 rpm
318i with M10/B18 engine (automatic transmission) . . . . . . . . . . . 750 ± 50 rpm
318i with M40/B18 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 ± 40 rpm
320i with M20/B20 engine (L-Jetronic) . . . . . . . . . . . . . . . . . . . . . . 800 ± 50 rpm
320i with M20/B20 engine (Motronic) . . . . . . . . . . . . . . . . . . . . . . . 760 ± 40 rpm
325i with M20/B25 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 760 ± 40 rpm
5-Series, E28 (“old-shape”)
518 and 518i with M10/B18 engine . . . . . . . . . . . . . . . . . . . . . . . . 800 ± 50 rpm
All other models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850 ± 50 rpm
5-Series, E34 (“new-shape”)
518i with M40/B18 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 ± 40 rpm
520i with M20/B20M engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 760 ± 40 rpm
525i with M20/B25M engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 760 ± 40 rpm
530i with M30/B30M engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 ± 50 rpm
535i with M30/B35M engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850 ± 50 rpm
CO% at 3000 rpm
3-Series, E30
316 with M10/B18 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 to 1.0
316i and 318i with M40/B16 engine . . . . . . . . . . . . . . . . . . . . . . . . 0.7 ± 0.5
318i with M10/B18 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 maximum
320i with M20/B20 engine (L-Jetronic) . . . . . . . . . . . . . . . . . . . . . . 1.0 ± 0.5
320i with M20/B20 engine (Motronic) . . . . . . . . . . . . . . . . . . . . . . . 0.7 ± 0.5
325i with M20/B25 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 ± 0.5
5-Series, E28 (“old-shape”)
518 and 518i with M10/B18 engine . . . . . . . . . . . . . . . . . . . . . . . . 1.0 maximum
525i with M30/B25 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 ± 0.5
528i with M30/B28 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 maximum
535i with M30/B34 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 to 1.5
M535i with M30/B34 engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 to 1.5
5-Series, E34 (“new-shape”)
All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7 ± 0.5
Air filter element
M10 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion W155 (round) or U504 (square)
M20 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion U504 or U527
M30 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion U504 or U527
M40 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion U527
Fuel filter (all fuel injection engines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion L206
Ignition system
Spark plug type
M10, M20 and M30 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion N9YCC
M40 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion C9YCC
Spark plug gap* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 mm
Spark plug (HT) leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available
* The spark plug gap quoted is that recommended by Champion for their specified plugs listed above. If spark plugs of any other type are to be
fitted, refer to their manufacturer’s spark plug gap recommendations.
Brakes
Disc brake pad thickness (minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 mm
Drum brake shoe lining thickness (minimum) . . . . . . . . . . . . . . . . . . . . . 2.0 mm
Wiper blades
Windscreen
3-Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X-5103
3-Series passenger side from 1991 . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X-5103 (20 inch) or Champion X-5303 (21 inch)
5-Series, E28 (“old-shape”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X-4503
5-Series, E34 (“new-shape”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available
Tailgate
3-Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X-4503
5-Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available
1•2Servicing Specifications

Tyre pressures (cold) - bars (psi)Front Rear
3-Series, E30
316 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9 (28) 2.1 (30)
316i
Saloon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 (29) 2.1 (30)
Estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 (29) 2.2 (32)
318i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 (26) 1.9 (28)
320i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9 (28) 2.0 (29)
325i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 (32) 2.3 (33)
5-Series, E28 (“old-shape”)
518 and 518i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 (29) 2.0 (29)
525i and 528i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 (32) 2.2 (32)
535i and M535i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 (33) 2.5 (36)
5-Series, E34 (“new-shape”)
518i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 (29) 2.0 (29)
520i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 (32) 2.1 (30)
525i, 530i and 535i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 (29) 2.3 (33)
Torque wrench settingsNm
Automatic transmission sump bolts
Three-speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 to 9
Four-speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 to 7
Spark plugs
M10 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 30
Except M10 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 to 33
Oxygen sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 to 33
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Lubricants and fluids
Component or system Lubricant type/specification
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multigrade engine oil, viscositySAE 10W/40 to 20W/50, to API SG
Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ethylene glycol-based antifreeze with corrosion inhibitors
Manual transmission* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear oil, viscosity SAE 80 to API-GL4, or single-grade mineral-based
engine oil, viscosity SAE 20, 30 or 40 to API-SG
Automatic transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dexron ll type ATF
Final drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BMW-approved hypoid gear oil, viscosity SAE 90**
Brake and clutch hydraulic systems . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic brake fluid to SAE J 1703 or DOT 4
Power steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dexron ll type ATF
* E34 520i & 525i with air conditioning, E34 530i & 535i - Dexron II type ATF)
** Only available in bulk; refer to your BMW dealer
Capacities*
1•3
1
Engine oil
M10 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 litres
M20 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 litres
M30 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.8 litres
M40 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 litres
Cooling system
M10 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 litres
M20 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5 litres
M30 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.0 litres
M40 engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 litres
Fuel tank
3-Series, E30
Saloon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 litres (early),
64 litres (later)
Estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 litres (early),
70 litres (later)
5-Series
E28 (“old-shape”) . . . . . . . . . . . . . . . . . . . . . . . . 70 litres
E34 (“new-shape”) . . . . . . . . . . . . . . . . . . . . . . . 81 litresManual transmission
ZF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 litres
Getrag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 to 1.5 litres
Automatic transmission (refill)
3-speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 litres
4-speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 litres
Final drive capacity (drain and refill)
3-Series, E30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9 litres
5-Series, E28 (“old-shape”) . . . . . . . . . . . . . . . . . . 0.9 litres
5-Series, E34 (“new-shape”) . . . . . . . . . . . . . . . . . 1.7 litres
*All capacities approximate
Servicing Specifications

Maintenance schedule
The following maintenance intervals are based on the assumption
that the vehicle owner will be doing the maintenance or service work,
as opposed to having a dealer service department do the work.
Although the time/mileage intervals are loosely based on factory rec-
ommendations, most have been shortened to ensure, for example, that
such items as lubricants and fluids are checked/changed at intervals
that promote maximum engine/driveline service life. Also, subject to
the preference of the individual owner interested in keeping his or her
vehicle in peak condition at all times, and with the vehicle’s ultimate
resale in mind, many of the maintenance procedures may be
performed more often than recommended in the following schedule.
We encourage such owner initiative.
When the vehicle is new, it should be serviced initially by a factory-
authorised dealer service department, to protect the factory warranty.
In many cases, the initial maintenance check is done at no cost to the
owner (check with your dealer service department for more
information).
1•4Maintenance and servicing
Every 250 miles or weekly, whichever
comes first
m mCheck the engine oil level (Section 4)
m mCheck the engine coolant level (Section 4)
m mCheck the brake fluid level (Section 4)
m mCheck the clutch fluid level (Section 4)
m mCheck the washer fluid level (Section 4)
m mCheck the tyres and tyre pressures (Section 5)
Every 6000 miles or 6 months,
whichever comes first
All items listed above, plus:
m mChange the engine oil and oil filter (Section 6)
m mCheck the power steering fluid level (Section 7)
m mCheck the tyres, and rotate if necessary (Section 9)
m mCheck the automatic transmission fluid level
(Section 8)
m mCheck the underbonnet hoses (Section 10)
m mCheck/adjust the drivebelts (Section 11)
m mCheck engine idle speed and CO (Section 12)
Every 12 000 miles or 12 months,
whichever comes first
All items listed above, plus:
m mCheck/service the battery (Section 13)
m mCheck the spark plugs (Section 14)
m mCheck/renew the HT leads, distributor cap and
rotor (Section 15)
m mCheck/top-up the manual transmission lubricant
(Section 16)
m mCheck the differential oil level (Section 17)
m mCheck the valve clearances, and adjust if
necessary - does not apply to M40 engines
(Section 18)
m mCheck and lubricate the throttle linkage (Section 19)
m mRenew the air filter (Section 20)
m mCheck the fuel system (Section 21)
m mInspect the cooling system (Section 22)
m mInspect the exhaust system (Section 23)
m mInspect the steering and suspension components
(Section 24)
m mCheck the driveshaft gaiter(s) (Section 25)
m mInspect the brakes (Section 26)
m mInspect/renew the windscreen wiper blades
(Section 27)
Every 24 000 miles or 2 years,
whichever comes first
All items listed above plus:
m mChange the automatic transmission fluid and filter
(Section 28)
m mDrain, flush and refill the cooling system (Section 29)
m mRenew the spark plugs (Section 14)
m mCheck/renew the spark plug HT leads (Section 15)
m mRenew the fuel filter (Section 30)
m mChange the manual transmission lubricant (Section 31)
m mChange the differential oil (Section 32)
m mCheck the evaporative emissions system, where
applicable (Section 33)
m mReset the service indicator lights (Section 34)
m mRenew brake fluid by bleeding (see Chapter 9)
m mCheck the handbrake operation (see Chapter 9)
Every 60 000 miles
m
mRenew the timing belt (Section 35)

inhibitors wear out, so it must be renewed at
the specified intervals.
Brake and clutch fluid
Warning: Brake fluid can harm
your eyes and damage painted
surfaces, so use extreme caution
when handling or pouring it. Do
not use brake fluid that has been standing
open or is more than one year old. Brake
fluid absorbs moisture from the air, which
can cause a dangerous loss of brake
effectiveness. Use only the specified type
of brake fluid. Mixing different types (such
as DOT 3 or 4 and DOT 5) can cause brake
failure.
14The brake master cylinder is mounted at
the left rear corner of the engine
compartment. The clutch fluid reservoir
(manual transmission models) is mounted on
the right-hand side.
15To check the clutch fluid level, observe
the level through the translucent reservoir.
The level should be at or near the step
moulded into the reservoir. If the level is low,
remove the reservoir cap to add the specified
fluid (see illustration).
16The brake fluid level is checked by looking
through the plastic reservoir mounted on the
master cylinder (see illustration). The fluid
level should be between the MAX and MIN
lines on the reservoir. If the fluid level is low,
first wipe the top of the reservoir and the cap
with a clean rag, to prevent contamination of
the system as the cap is unscrewed. Top-up
with the recommended brake fluid, but do not
overfill.
17While the reservoir cap is off, check the
master cylinder reservoir for contamination. If
rust deposits, dirt particles or water droplets
are present, the system should be drained
and refilled.
18After filling the reservoir to the proper
level, make sure the cap is seated correctly, to
prevent fluid leakage and/or contamination.
19The fluid level in the master cylinder will
drop slightly as the disc brake pads wear.
There is no need to top up to compensate for
this fall provided that the level stays above the
MIN line; the level will rise again when new
pads are fitted. A very low level may indicateworn brake pads. Check for wear (see Sec-
tion 26).
20If the brake fluid level drops consistently,
check the entire system for leaks immediately.
Examine all brake lines, hoses and
connections, along with the calipers, wheel
cylinders and master cylinder (see Sec-
tion 26).
21When checking the fluid level, if you
discover one or both reservoirs empty or
nearly empty, the brake or clutch hydraulic
system should be checked for leaks and bled
(see Chapters 8 and 9).
Windscreen washer fluid
22Fluid for the windscreen washer system is
stored in a plastic reservoir in the engine
compartment (see illustration).
23In milder climates, plain water can be
used in the reservoir, but it should be kept no
more than two-thirds full, to allow for
expansion if the water freezes. In colder
climates, use windscreen washer system
antifreeze, available at any car accessory
shop, to lower the freezing point of the fluid.
This comes in concentrated or pre-mixed
form. If you purchase concentrated antifreeze,
mix the antifreeze with water in accordance
with the manufacturer’s directions on the
container.
Caution: Do not use cooling
system antifreeze - it will damage
the vehicle’s paint.
5 Tyre and tyre pressure
checks
1
1Periodic inspection of the tyres may save
you the inconvenience of being stranded with
a flat tyre. It can also provide you with vital
information regarding possible problems in
the steering and suspension systems before
major damage occurs.
2Tyres are equipped with bands that will
appear when tread depth reaches 1.6 mm, at
which time the tyres can be considered worn
out. This represents the legal minimum tread
depth; most authorities recommend renewing
any tyre on which the tread depth is 2 mm or
less. Tread wear can be monitored with a
simple, inexpensive device known as a tread
depth indicator (see illustration).
3Note any abnormal tyre wear (see
illustration overleaf). Tread pattern irregular-
ities such as cupping, flat spots and more
wear on one side than the other are
indications of front end alignment and/or
wheel balance problems. If any of these
conditions are noted, take the vehicle to a tyre
specialist to correct the problem.
4Look closely for cuts, punctures and
embedded nails or tacks. Sometimes, after a
nail has embedded itself in the tread, a tyre
will hold air pressure for a short time, or may
1•9
4.22 The windscreen washer fluid reservoir
is located in the right front corner of the
engine compartment on most models4.16 The brake fluid level should be kept
above the MIN mark on the translucent
reservoir - unscrew the cap to add fluid4.15 Adding hydraulic fluid to the clutch
fluid reservoir
5.4a If a slow puncture is suspected,
check the valve core first to make sure it’s
tight5.2 Use a tyre tread depth indicator to
monitor tyre wear - they are available at
car accessory shops and service stations,
and cost very little
1
Weekly Checks

Caution: Do not overfill the
reservoir. If too much fluid is
added, remove the excess with a
clean syringe. Refit the cap.
7If frequent topping-up is needed, check the
power steering hoses and connections for
leaks and wear (see Section 10).
8Check the condition and tension of the
drivebelt (see Section 11).
8 Automatic transmission fluid
level check
1
Caution: The use of transmission
fluid other than the type listed in
this Chapter’s Specifications
could result in transmission
malfunctions or failure.
1The automatic transmission fluid should be
carefully maintained. Low fluid level can lead
to slipping or loss of drive, while overfilling
can cause foaming and loss of fluid. Either
condition can cause transmission damage.
2Since transmission fluid expands as it heats
up, the fluid level should only be checked
when the transmission is warm (at normal
operating temperature). If the vehicle has just
been driven over 20 miles (32 km), the
transmission can be considered warm. You
can also check the fluid level when the
transmission is cold. If the vehicle has not
been driven for over five hours and the fluid is
about room temperature (20°C), the
transmission is cold. However, the fluid level
is normally checked with the transmission
warm, to ensure accurate results.
Caution: If the vehicle has just
been driven for a long time at
high speed or in city traffic, in hot
weather, or if it has been pulling
a trailer, an accurate fluid level reading
cannot be obtained. Allow the trans-
mission to cool down for about 30 minutes.
3Immediately after driving the vehicle, park it
on a level surface, apply the handbrake and
start the engine. While the engine is idling,
depress the brake pedal and move theselector lever through all the gear ranges,
beginning and ending in Park.
4The automatic transmission dipstick tube is
located in the left rear corner of the engine
compartment.
5With the engine still idling, pull the dipstick
out of the tube (see illustration), wipe it off
with a clean rag, push it all the way back into
the tube and withdraw it again, then note the
fluid level.
6The level should be between the two marks
(see illustration). If the level is low, add the
specified automatic transmission fluid through
the dipstick tube - use a clean funnel,
preferably equipped with a fine mesh filter, to
prevent spills.
Caution: Be careful not to
introduce dirt into the
transmission when topping up.
7Add just enough of the recommended fluid
to fill the transmission to the proper level. It
takes about half a litre to raise the level from
the low mark to the high mark when the fluid
is hot, so add the fluid a little at a time, and
keep checking the level until it’s correct.
8The condition of the fluid should also be
checked along with the level. If the fluid is
black or a dark reddish-brown colour, or if it
smells burned, it should be changed (see
Section 28). If you are in doubt about its
condition, purchase some new fluid, and
compare the two for colour and smell.
9 Tyre rotation
1
1The tyres can be rotated at the specified
intervals, or whenever uneven wear is noticed.
However, bear in mind that if rotation
succeeds in making all the tyres wear evenly,
you will eventually have to renew all four at
once. Since the vehicle will be raised and the
wheels removed anyway, check the brakes
also (see Section 26). Note: Even if you don’t
rotate the tyres, at least check the wheel bolt
tightness.
2It is recommended that the tyres be rotatedin a specific pattern (see illustration)so that
their direction of rotation remains the same.
3Refer to the information in “Jacking and
towing”at the front of this manual for the
proper procedure to follow when raising the
vehicle and changing a tyre.
4The vehicle must be raised on a hoist or
supported on axle stands to get all four tyres
off the ground. Make sure the vehicle is safely
supported!
5After the rotation procedure is finished,
check and adjust the tyre pressures as
necessary, and be sure to check the wheel
bolt tightness.
10 Underbonnet hose check
and renewal
3
Warning: Renewal of air
conditioning hoses must be left
to a dealer service department or
air conditioning specialist having
the equipment to depressurise the system
safely. Never disconnect air conditioning
hoses or components until the system has
been depressurised.
General
1High temperatures under the bonnet can
cause deterioration of the rubber and plastic
hoses used for various systems. Periodic
inspection should be made for cracks, loose
clamps, material hardening, and leaks.
2Information specific to the cooling system
can be found in Section 22, while the braking
system is covered in Section 26.
3Most (but not all) hoses are secured with
clamps. Where clamps are used, check to be
sure they haven’t lost their tension, allowing
the hose to leak. If clamps aren’t used, make
sure the hose has not expanded and/or
hardened where it slips over the fitting,
allowing it to leak.
Vacuum hoses
4It’s quite common for vacuum hoses,
especially those in the emissions system, to
be colour-coded or identified by coloured
1•13
9.2 The tyre rotation pattern for these
models8.6 With the fluid hot, the level should be
kept between the two dipstick notches,
preferably near the upper one8.5 The automatic transmission fluid
dipstick (arrowed) is located near the
bulkhead on the left side of the engine
compartment
1
Every 6000 miles

them to the new cap in the exact same
location - do not simultaneously remove all
the HT leads, or firing order mix-ups may
occur.
16 Manual transmission
lubricant level check
1
1The transmission has a filler/level plug
which must be removed to check the lubricant
level. If the vehicle is raised to gain access to
the plug, be sure to support it safely - do not
crawl under a vehicle which is supported only
by a jack!Note:The vehicle should be level to
give an accurate lubricant check.
2Remove the plug from the side of thetransmission (see illustration)and use your
little finger to reach inside the plug from the
housing and feel the lubricant level. It should
be at or very near the bottom of the plug hole.
3If it isn’t, add the recommended lubricant
through the plug hole with a syringe or
squeeze-bottle, until it just starts to run out of
the hole. Refer to “Lubricants and fluids” at
the beginning of this Chapter for the correct
lubricant type. The manual transmissions on
some later or high-performance models are
filled with automatic transmission fluid (ATF).
Such transmissions normally carry a sticker to
this effect near the filler/level plug. Refer to a
BMW dealer if still in doubt.
4Refit the plug and tighten securely. Check
for leaks after the first few miles of driving.
5If regular topping-up is required, this can
only be due to a leak which should be found
and repaired before it becomes serious.17 Differential lubricant level
check
1
1The differential has a filler/level plug which
must be removed to check the lubricant level.
If the vehicle is raised to gain access to the
plug, be sure to support it safely - do notcrawl under the vehicle when it’s supported
only by the jack! Note:The vehicle should be
level to give an accurate lubricant check.
2Remove the filler/level plug from the
differential (see illustration). Use an Allen key
to unscrew the plug.
3Use your little finger as a dipstick to make
sure the lubricant level is up to the bottom of
the plug hole. If not, use a syringe or squeeze-
bottle to add the recommended lubricant until
it just starts to run out of the hole.
4Refit the plug and tighten it securely.
5If regular topping-up is required, this can
only be due to a leak which should be found
and repaired before it becomes serious.
18 Valve clearances -
check and adjustment
3
Note:This procedure does not apply to the
M40 engine, which has automatic adjusters.
1The valve clearances can be checked with
the engine hot or cold, but note that different
values are specified, depending on engine
temperature. If it is wished to check/adjust the
valve clearances with the engine hot, if
necessary start and run the engine until it
reaches normal operating temperature, then
shut it off.
Caution: If the clearances are checked
with the engine hot, extra care
must be taken to avoid burns.
2Remove the valve cover
from the engine (see Chapter 2A).
3Turn the engine as necessary until No 1
piston (front) is at Top Dead Centre (TDC) on
the compression stroke (see Chapter 2A).
4Check the valve clearances for No 1
cylinder. The valve clearances can be found in
the Specifications Section at the beginning of
this Chapter.
5The clearance is measured by inserting the
specified size feeler gauge between the end
of the valve stem and the rocker arm adjusting
eccentric. You should feel a slight amount of
1•19
15.11d The rotor arm should be checked
for wear and corrosion as indicated here
(if in doubt about its condition, buy a new
one)
15.11c Shown here are some of the
common defects to look for when
inspecting the distributor cap (if in doubt
about its condition, fit a new one)
18.6 The valve clearance is adjusted by
turning the eccentric with a wire hook -
once the specified clearance is obtained,
tighten the locknut with a spanner, then
remove the feeler gauge17.2 Remove the differential filler/level
plug with an Allen key, and make sure the
lubricant is level with the bottom of the
hole16.2 Use a large Allen key to remove the
filler/level plug (arrowed) and check the
lubricant level with your little finger. It
should be level with the bottom of the hole
- if it’s low, add lubricant
1
Every 12 000 miles