wheel torque BMW 525i 1997 E39 Workshop Manual

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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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Cylinder Head Removal - an-]
Fit thrust spacer (A) to intake camshaft (B) and tighten down
with threaded locating studs. Place longer threaded end of
studs into camshaft
(arrows).
Tightening torque
Impulse
wheel studs to intake camshaft) 20 Nm (15 ft-lb)
Fit primary sprocket to primary timing chain and install on ex-
haust camshaft so that pointer on sprocket
(arrow) lines up
with cylinder head sealing surface.
4 Insert BMW special tool 11 4 220 into timing chain tensioner
bore and bring center spindle into contact with tensioning rail.
Tighten until slack is removed, but do not pretension timing
chain.
NOTE-
BMW special tool 11 4 220 is an adjustable primary chain
tensioner and simulates the function of the tensioner.
- Rechecic arrow on primary sprocket is aligned with upper
edge of cylinder head. Reposition sprocket if necessary.
Insert and tighten down threaded locating studs
(arrows) in
end of exhaust camshaft. Note installed position of studs.
Tightening torques Exhaust camshaft locating stud
20 Nm (15 ft-lb)

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113-51
Cylinder Head Removal and Installation
< Pull out exhaust camshaft splined shaft to stop.
- Press down on secondary chain tensioner and remove ten-
sioner lock-down tool.
Preload primary chain:
Tighten adjusting screw on
BMW special tool 11 4 220 to
specified torque.
Tightening torque
Primary chain tensioner preload
0.7 Nrn (6 in-lb)
< Preload exhaust camshaft sprrng plate by pressing on im-
pulse wheel while tightening mounting nuts (arrows) finger
tight.
Install BMW special tool 11 6 150 (VANOS setup bracket) to
front of cylinder head timing case. Install nuts (arrows) finger
tight, then tighten down uniformly until special tool is in full
contact with cylinder head.
CAUTION-
Make sure all gasket material is removed from face of cylin-
der head. Clean sealing
face and keep free of oil. If any for-
eign material is present on the sealing
sudace, the camshait
timina will be incorrect.

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. .- --
Cylinder Head Removal and Installation
Secure camshaft sprockets and impulse wheels:
Tighten mounting screws
(A) on exhaust camshaft impulse
wheel to approx.
5 Nm (44 in-lb).
Tighten mounting nuts
(8) on exhaust and intake sprocket
assemblies to approx.
5 Nm (44 in-lb).
Torque down mounting screws (A) and nuts (B) to final
specifications.
Tightening torques
sprocket assembly to camshaft
initial torque
5 Nm (44 in-lb)
Sprocket assembly
wheel to camshaft
M7 torx screws (A) 20 Nm (15 ft-lb)
M6 mounting nuts (5) 10 Nm (8 ft-lb)
- Remove crankshaft locking tool from transmission bell hous-
ing so that crankshaft is no longer secured in
TDC position.
- Remove camshaft locking tools from cylinder head.
4 Turn engine over twice in direction of rotation until cylinder 1
intake and exhaust camshaft lobes (arrows) face each other.
- Secure crankshaft in TDC position with BMW special tool 11
2 300.
4 Place BMW special tool set 11 3 240 over camshafts and
measure clearances.
CAUTION-
- If the exhaust side of the tool (A) is not flush with tlie head,
camshaft timing is incorrect Reset camshaft timing as de-
scribed in
117 Camshaft Timing Chain.
* Due to flexible sprocket design, VANOS unit tolerances
and play in the VANOS splines, when the camshaft tim-
ing is set correctly, the intake side of special tool
11 3
240 (6) may be up to 1 mm (0.04 in.) above the surface
of the cylinder head. This is normal. Reassemble en-
gine.
Othe~lise, reset camshaft timing as described in
11 7 Camshaft Timing Chain.
- Remove BMW special tool 11 6 150 from front of cylinder
head.

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. ." ".
[Cylinder Head Removal and Installation - .. - -1 -
4 Insert and secure VANOS sealing plugs (arrows) with new
sealing O-rings.
Tightening torque Sealing
plug to VANOS 50
Nm (37 ft-lb)
4 Install coolant pipe fasteners at base of cylinder head and
tighten fasteners (arrows).
NOTE-
Use new sealing O-ring on coolant pipe.
- lnstall VANOS oil line banjo bolt with new seals. Attach oil
line to VANOS unit.
Tightening torque Oil line to VANOS unit
(banjo bolt) 32
Nm (24 ft-ib)
- Remove adjustable timing chain tensioner tool and reinstall
chain tensioner.
Tightening torque Primary chain tensioner cylinder to
cylinder head 70
Nm
(52 fi-ib)
- Remove flywheel locking tool from transmission bell housing.
Replace special tool bore sealing plug.
- Remove camshaft locking tools from cylinder head
4 lnstall intake camshaft cover and cylinder head cover.
0 Check for correct seating of half-moon seals (A) in back of
cylinder head cover.
Use a small amount of Three Bond
1209 8 or equivalent
sealant at corners
(B) of half-moon cutouts.
Seat gasket and seal corners in front of cylinder head at
VANOS unit.
Tightening torque
Cylinder head cover to cylinder head
(M6) 10 Nm (89 in-lb)

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~ ~. --
Cylinder Head and Valvetrain .-
4 While maintaining tension on timing chain, rotate crankshaft
at vibration dampener from
30" before TDC in direction of ro-
tation (clockwise) until number
1 cylinder is at TDC position
with line between the OIT mark (arrow) on front pulley
aligned with boss on lower timing chain cover.
4 Secure crankshaft in TDC position with BMW special tool
11 2 300 (arrow).
Slide impulse wheel on intake camshaft, aligning boss with
raised portion on camshaft (arrow).
Fit thrust spacer
(A) to intalte camshaft and tighten down with
threaded locating studs (arrows). Place longer threaded por-
tion of studs into camshaft.
Tightening torque
Impulse wheel studs to intake camshaft (M7)
20 Nm (15 ft-lb)

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. .
Cylinder Head and Valvetrain
Install exhaust camshaft impulse wheel, aligning pointer (B)
with top edge of cylinder head (A). Install mounting nuts (ar-
rows) finger tight.
4 Pull out exhaust camshaft splined shaft to stop.
- Press down on secondary chain tensioner and remove ten-
sioner lock-down tool.
Preload primary chain:
- Tighten adjusting screw on BMW special tool 11 4 220 to
specified torque.
Tightening torque Primary chain tensioner preload
0.7 Nm (6 in-lb)

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1 16-36
I Cylinder Head and Valvetrain
4 Preload exhaust camshaft spring plate by pressing on im-
pulse wheel while tightening mounting nuts (arrows)
fingel
tight.
4 Install BMW special tool 11 6 150 (VANOS setup bracket) to
front of cylinder head timing case. Install nuts (arrows) finger
tight, then tighten down uniformly until special tool is in full
contact with cylinder head.
CAUTION--
Male sure aNgas1ef material Is removed from face of cyiin-
der head. Clean sealing face and keep free of oil.
4 Secure camshaft sprockets and impulse wheels:
Tighten mounting screws (A) on exhaust camshaft impulse
wheel to approx.
5 Nm (44 in-lb).
Tighten mounting nuts (B) on exhaust and intake sprocket
assemblies to approx.
5 Nm (44 in-lb).
Torque down mounting screws (A) and nuts (B) to final
specifications.
Tightening torques Sprocket assembly to camshaft initial torque
5 Nm (44 in-lb)
Sprocket assembly wheel to carnshaft
M7 tom screws (A) 20 Nm (15 ft-lb)
M6 mounting sciew (6) I0 Nm (8 ft-lb) - - -
- - Remove crankshaft locking tool from crankcase.
- Remove camshaft locking tools from cylinder head.

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I Cylinder Head and Valvetrain
- Remove adjustable primary timing chain tensioner tool and
reinstall primary chain tensioner cylinder to cylinder head.
Tightening torque
Primary chain tensioner cylinder
to 70 Nm (52 ft-lb)
cylinder head
- Remove flywheel locking tool from crankcase. Replace spe-
cial tool bore sealing plug.
- Remove camshaft locking tools from cylinder head
Install intake camshaft cover and cylinder head cover.
Check for correct seating of half-moon seals (A) in back of
cylinder head cover.
Use a small amount of Three Bond
8 1209 or equivalent
sealing compound at corners
(B) of half-moon cutouts.
Seat gasket and seal corners at VANOS unit with Three
Bond
@ 1209.
Tightening torque Cylinder head cover to cylinder head
(M6) 10 Nm (89 in-lb)
- Installation of the remaininq parts is reverse or removal, not- -
ing the following:
Change engine
011 and f~lter as descr~bed in 020 Mainte-
nance.
Reconnect battery.
To prevent damaging the engine electronic systems, install
all ground wire previously removed, including the ground
wires for the ignition coils.
Tightening torque
-
Radiator cooling fan to coolant pump 40 Nm
(30 ft-ib)
Spark plug to cylinder head
25 Nm (18 ft-ib)

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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).