wheel bolts BMW 525i 2001 E39 Workshop Manual

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001 General Warnings and Cautions
PLEASE READ THESE WARNINGS AND CAUTIONS
BEFORE PROCEEDING
WITH MAINTENANCE AND REPAIR WORK.
WARNINGS-
See also CAUTIONS
- Some repairs may be beyond your capability. If you lack the skills, - Catch draining fuel, oil, or brake fluid in suitable containers. Do
tools and equipment, or a suitable workplace for any procedure
not use
foodor beverage containers that might mislead someone
described in this manual, we suggest you leave such repairs to
into
drinking from them. Store flammable fluids away from fire
an authorized BMW dealer service department or other qualified
hazards. Wipe up spills at once, but do not store the oily rags,
shop. which can ignite and burn spontaneously.
. Do not reuse any fasteners that are worn or deformed. Many fas- Always observe good worRshop practices. Wear qoqqles when
teners are designed to be used only once and become
unreliable you operate machine tools or work with battery acid:kloves or
and mav fail when used a second time. This includes, but is not other
~rotective clothino should be worn whenever the iob re-
limited io, nuts, bolts, washers, self-locking nuts or bolts, clrclips yires' working with harmful substances.
and cotter pins. Always replace these fasteners with new parts.
Greases, lubricants and other automotive chemicals contain toxic
. Never work under a lifted car unless it is solidly supported on
substances, many of which are absorbed directly through the
stands
desiqned for the purpose. Do not supeort a car on cinder
skin. Read the manufacturer's instructions and warninos careful-
blochs, hollow tiles orotherbrops that may drurnbie undercontin-
uous toad. Never work under a car that is supported solely by a
iack. Never work under the car
while the enqine is runninq. - -
If you aregoing to work underacaron the ground, makesure that
the ground is level. Block the wheels to
keep the car from rolling.
Disconnect the battery negative
(-) terminal to prevent others
from starting the car while you are under it.
- Never run the engine unless the work area is well ventilated. Car-
bon monoxide kills.
Rings, bracelets and other jewelry should be removed so that
they cannot cause electrical shorts, get caught in running ma-
chinery, or be crushed by heavy parts.
- Tie long hair behind your head. Do not wear a necktie, a scarf.
loose clothing, or a necklace when you work near machine tools
or running engines. if your hair, clothing, or jewelry were to get
caught in the machinery, severe injury could result.
DO not attempt to
work on your car if you do not feel well. You in-
crease the
danger of injuryto yourseliand others if you are tired,
uDset or have taken medication or anv other substance that mav
keep you from being fully alert.
Illuminate your work area adequately but safely. Use a portable
iy. Use hand and eye protection. Avoid direct skin conGct.
Disconnect the battery negative (-) terminal whenever you work
on the fuel system
orthe electrical system. Do not smokeorwork
near heaters or other fire hazards. Keep an approved fire extin-
guisher handy.
. Friction materials (such as brake pads or shoes or clutch discs)
contain asbestos fibers or other friction materials. Do not create
dust by grinding, sanding, or by cleaning with compressed air.
Avoid breathing dust. Breathing any
friclion material dust can
lead to serious diseases and may result in death.
Batteries
giveoff explosive hydrogen gas during charging. Keep
sparks, lighted matches and open flame away from the top of the
battery. If hydrogen gas escaping from the cap vents is ignited, it
will ignite gas trapped in the cells and cause the battery to ex-
plode.
Connect and disconnect battery cables, jumper cables or a bat-
tery charger only wilh the ignition switched off. Do not disconnect
the battery while the engine is running.
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.
. . safety lighiforworking lnsideor under the car. Make sure the bulb - Do not allow battery charging vollage to exceed 16.5 volts. If the
is enclosed bv a wire caoe. The hot filament of an accidentallv
batten! beoins ~roducina oas or boilino violentiv, reduce the
broken bulb can ignite spilled
fuel, vapors or oil. , - - - charglng rate. ~oostlng a sutfaled battery at a igh charging rate
can cause an
explosion.
-
Continued on next page

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General
Much of the necessary maintenance and minor repairthat an
automobile will need can be done with ordinary tools. Below
you'll find important information on how to work safely, a dis-
cussion of what tools will be needed and how to use them.
Safety
Although an automobile presents many hazards, common
sense and good equipment can help ensure safety. Many ac-
cidents happen because of carelessness. Pay attention and
stick to the safety rules in this manual.
Lifting the car
4 The proper jacking points should be used to raise the car
safely and avoid damage. The
jack supplied with the car can
only be used at the four side points (arrows) just behind the
front wheels or just in front of the rear wheels.
WARNING-
. Never work under a lifted car unless it is solidly supported
on
jack stands that are intended for that purpose.
When raising the car using a floorjack or hydraulic lift,
carefully position the jack pad to prevent damaging the
car body.
* Watch the jack closely. Male sure it stays stable and
does not shift or tilt.
As the car is raised, it may roll
sliahtlv and the
jack mav shift.
Raising car
- Park car on flat, level surface.
- If changing a tire, loosen lug bolts before raising car. See
Changing
a tire.
Place jack into position.
Malte sure jack is resting on flat, sol-
id surface. Use a board or other support to provide a firm sur-
face for jack, it necessary.
- Raise car slowly while constantly checking position of jack
and car.
- Once car is raised, bloclc wheel that is opposite and farthest
from jack to prevent car from unexpectedly rolling.

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-
General
BMW special tools
Many repairs covered in this manual call for the use of BMW
special tools. Many of the BMW special tools mentioned in
this manual are simply the best thing to use to do the job cor-
rectly. In these cases, the tool is identified with a
BMW parl
number. See your authorized BMW dealer parts department
for information on how to order special tools.
There are some jobs for which expensive special tools are es-
sential, and not a cost-effective purchase for a one time repair
by the do-it-yourself owner. This manual includes such re-
pairs for the benefit of those with the necessary experience
and access to tools. For the do-it-yourselfer, the need for spe-
cial tools is noted in the text, and whether or not BMW dealer
service is recommended.
Changing a tire
- Stop car on as flat a surface as possible, in a place where you
can be easily seen by other drivers. Avoid stopping just over
the crest of a hill.
WARNING -
If a tire goes flat while driving, pull well off the road. Changing
a tire on a busy slreet or liigliway is very dangerous. If
nec-
essag drive a short distance on the flat tire to get to a safe
place. It is much better to ruin a tire or rim than to
risk being
hit.
-
- Turn on emergency flashers, and set out flares or emergency
markers well behind car.
Choclc wheel (wheel chock located
in trunk) diagonally opposite to the one being changed. Pas-
sengers should get out of car and stand well away from road.
- Take jaclc and tools from tool area beneath trunk mat. Re-
move spare tire from tire storage tray.
- Loosen wheel bolts while car is on ground, but leave them a
little snug.
< Place jack in lifting point nearest wheel being changed. Use
a board to provide a firm footing for jack if ground is soft.
Raise car only far enough so that the wheel is fully off ground
and then remove wheel nuts and wheel.
- Install spare wheel. Install wheel nuts and tighten them hand
tight using lug nut wrench.

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Cylinder Head and valvetrain1
4 Remove camshaft position sensor (A) from timing chain cov-
er. Remove bolts
(arrows) from timing chain covers and re-
move covers from right and left cylinder heads.
4 Counterhold intalte carnshaft on right cylinder head
4 Counterhold right intalte camshaft and remove sprocltet
mounting bolts
(arrows) from right cylinder head.
Remove carnshaft impulse wheel and primary chain
sprocket.
- Slide primary timing chain off sprocltet and suspend chain
with stiff wire to prevent it from dropping into lower timing
chain cover.

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Camshaff Timing Chain
NOTE-
Mark direction of belt rotation if reusing belt.
- Remove vibration damper mounting bolts and remove vibra-
tion damper and pulley from hub.
NOTE- The M52
6-cylinder engine uses a 2-piece vibration damper
and hub assembly.
4 Install crankshaft holder (BMW special tools 11 2 150
and11 2410).
NOTE
-
Be careful while aligning locator pin hole in special tool 11 2
410 with vibration damper locatorpin.
- While counterholding crankshaft, loosen and remove crank-
shaft center bolt.
CAUTION-
Do not use flywheel locking tool to hold crankshaft stationary
to loosen or tighten crankshaft hub center bolt Use only the
special tools specified, or equivalent hub holding tool.
NOTE- The cranlshaft hub center bolt is torqued to 4
10 Nm
(300
ft-16).
- Remove damper hub and special tools.
4 Install cap (BMW special tool 11 2 383) on end of cranltshaft.
4 Install seal guide (BMW special tool 11 2 385) over end of
crankshaft. Be sure to align tool with keyway on crankshaft
(arrow).

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Camshaft Timing Chain
lnstall vibration damper mounting bolts. Note hub locating
dowel (arrow).
Tightening torque
Vibration damper to crankshaft hub
(ME) 22 Nm (16 ft-lb)
- Installation is reverse of removal noting the following:
Installing drive belts. See 020 Maintenance.
Install cooling fan. See 170 Radiator and Cooling Sys-
tem.
Crankshaft oil seal, replacing
(M52 TU and M54 engines)
The crankshafl front seal IS located in the lower timing cover,
behind the
vibrat~on damper.
- Disconnect negative (-) cable from battery.
Disconnecting the battery may erase fault
code(s) storedin
control module memoy Checlc for fault codes using spe-
cial
BMW diagnostic equipment.
Prior to disconnecting the battery, read the battery dis-
connection cautions given in
001 General Cautions
and Warnings.
- Remove splash guard from beneath engine
- Remove engine cooling fan assembly. See 170 Radiator
and Cooling System.
NOTE- Cooling fan nut
(32 mm wrench) has left-hand threads.
- Remove drive belts. See 020 Maintenance
NOTE-
Mark direction of belt rotation if reusing belt.
- Install crankshaft holding tool (BMW special tool 11 8 19011 1
8 200). Make sure tool locks into place in openings in damper
assembly. While counterholding crankshafl with special tool,
remove crankshaft center bolt.
CAUTIOI\C
Do not use flywheel locling tool to hold crankshaft station-
ary to loosen or tighten
cranl(shaft hub center bolt. Use
only the special tools specified, or equivalent hub holding
tool.
Use care when removing
damper/hub assembly, as ~t is
easy to damage the radiator

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4 With crankshaft at TDC position, remove vibration damper
bolts (arrows) and remove vibration damper.
< Mount crankshaft holding tool (BMW special tool 11 2 150
and
11 2 410) to crankshaft hub. Counter hold crankshaft and
loosen crankshaft hub retaining bolt.
Crankshaft hub retaining bolt is torqued to
410 Nm (300 ft-lb).
Do not use flywheel
locliing tool to hold cranl(shait stationary
to loosen or tighten crankshaft hub center bolt. Use only the
special tools specified, or equivalent hub holding tool.
- Remove crankshaft hub.
- Remove cylinder cover mounting fasteners and remove cyl-
inder head cover.
NOTE-
The cylinder head cover mounting bolt insulators and gas-
lets should be reinstalled in their original positions. Make
note of their arrangement during removal.
- Drain engine oil, remove oil pan. See 119 Lubrication Sys-
tem.
Remove primary timing chain tensioner (arrow).
CAUTION-
Timing chain tensioner is under spring tension. I
- Remove VANOS control unit. See VANOS control unit, re-
moving
(M52 engine).
- Remove fasteners from intake and exhaust camshaft
sprocket.

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-- -
Chain 1
- Install cylinder identification trigger plate to front of intake
camshaft.
- Install spacer to front of intake camshaft
- Install secondary chain sprockets and chain as an assembly
so that arrows on sprockets are pointing up. Center mounting
holes in sprockets to bolt holes in camshafts.
4 lnstall thrust washers and spring plate to intake cam
sprocket.
Tighten intake camshaft sprocket nuts.
- Install VANOS control unit, see VANOS control unit, install-
ing
(M52 engine).
Tightening torque
Intake camshaft sprocket nuts to studs
(ME) 1011 Nm (8919 In-lb) 502117068
- Unlock and release secondary chain tensioner,
4 Preload primary timing chain by torquing adjustable primary
chain tensioner (BMW special tool
11 4 220) to 1.3 Nm
(11 in-lb).
- Tighten exhaust camshaft sprocket bolts in two stage
Tightening torque Exhaust camshaft sprocket bolls (M7)
Stage 1
5 Nrn (44 in-lb)
Stage
2 22 Nm (17 ft-lb)
- Remove crankshaft locking tool and camshaft locking tools.
< Align hub with keyway and tap into place. Insert new center
bolt with washer shoulder (arrow) facing hub.
CAUTION-
Inspect woodruff ley for damage before installing hub.
- Attach crankshaft holding tool (BMW special tools 11 2
15011 1 2 410) to hub. Counterhold hub with tool while tight-
ening center bolt.
CAUTION-
Do not use flywheel locling tool to hold crankshaft stationary
to loosen or tighten
cranlshaft hub center bolt. Use only the
special tools specified, or equivalent hub holding tool.

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~ ~~ ~
I Camshaft Timing Chain I --
lnstall crankshaft holding tool (BMW special tool 11 8 190/11
8 200). Make sure cut outs in tool engages openings in
damper assembly. While counterholding crankshaft with
special tool, remove crankshaft center bolt (A).
CAUTION-
Do not use flywheel locking tool to hold crankshaft stationary
NOTE-
The crankshaft hub centerbolt is tightened to a torque of 410
Nm (300 ft-lb).
4 Install crankshaft damper puller (BMW special tool 11 8 210)
to 11 8 200. and (A) remove damper from crankshaft.
The crankshaft must not be allowed to rotate when the timing
chains are loosened or removed. The pistons can contact the
valves. Use appropriate crankshaft holding tool when loosen-
ing crankshaft hub center bolt.
Using a drift of less than
5 mm diameter, drive two locating
dowels in left and right sides of lower timing
cham cover to-
ward engine. Remove cover mounting bolts
(arrows) and
carefully lift cover off.
CA
UTION-
* Use care when removing the cover from the cylinder heao
gasket. If the cover is stuck, use a sharp
knife to separate
it from the headgasket.
If cylinder liead gasket Is damaged, remove cylinder
head and replace head gasket. See
113 Cylinder
head and valvetrain.
NOTE-
- The chain cover can be removed with the coolant pump in-
stalled.
Use care when removing the cover from the coolant pipe
at rear.
- Push primary chain tensioner guide rail aside and remove
chain.

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11 9-2
Lubrication System
This repair group covers lubrication system troubleshooting
as well as oil pan removal and oil pump replacement.
In 6-cylinder models, removal of the oil pan requires the re-
moval of the exhaust system and some front suspension
components. Those procedures are fully covered in:
180 Exhaust System
210 Clutch
230 Manual Transmission
0 240 Automatic Transmission
310 Front Suspension
320 Steering and Wheel Alignment
NOTE-
Oil change procedure and oil filter replacement are covered
in
020 Maintenance.
CAUTIOG
V8 engines: The oil pump fasteners (including the sprocket
retaining nut) are known to vibrate loose. This can result in oil
starvation and engine failure. Be sure to check oil bolts and
nut tightness whenever the
oilpump is accessible. If any fas-
teners are found to be loose, remove them and reinstall with
Loctite
Band torque to specifications.
Special tools
The engine needs to be properly supported while the front
suspension
subframe is lowered to access the oil pan.
A standard oil pressure gauge may be used for measuring oil
pressure.
Engine support bracket
(Tool No, BMW 00 0 20012011202~2041208)
4 6-cylinder crankshalt rear main seal tools
(Tool No. BMW 00 5 50011
1 1 260)