1998 BMW 528i Crankshaft

Downloaded from www.Manualslib.com manuals search engine
Cp-- Camshaft -- Timing Chain
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
(6) on exhaust and intake sprocket
assemblies to approx.
5 Nm (44 in-lb).
Torque down mounting screws (A) and nuts
(6) to iinal
specifications.
Tightening torques Sprocket assembly
to camshaft
initial torque
5 Nrn (44 in-lb)
Sprocket assembly to camshaft
M7 Torx screw (A) 20 Nm (I5 it-lb)
M6 mounting nut (8) 10 Nm (89 in-lb)
- Remove flywheel locking tool from transmission bellhousing
so that crankshaft is no longer secured.
- Remove camshaft loclting tools from rear of camshafts.
4 Crank engine over by hand 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 11 3 240 over camshaft ends and
measure clearance of tool to cylinder head surface.
NOTE-
* If the exhaust side of the tool is not flush with the head (gap
A), retime the camshafts as described laler in this repair
group.
Due to flexible sprocket design and VANOS control unit tol-
erances and play, the
intake side of special tool 71 3 240
may be up to
I mm (0.04 in) above the suriace of the cyl-
inder head (gap
B). This is normal. Otherwise, retime the
camshafts as described in
VANOS timing, checking and
adjusting (M52 TU and 11154 engines).
- Remove VANOS setup bracket from front of cylinder head
- Install VANOS control unit. See VANOS control unit, in-
stalling
(01152 TU and M54 engines).
- Install intake camshaft oil baffle

Downloaded from www.Manualslib.com manuals search engine
11 7-66
I Camshaft Timing Chain
4 install 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
1209 8 or equivalent
sealant at corners
(B) of half-moon cutouts. Seal corners
in front of cylinder head at VANOS control unit.
Tightening torque
Cylinder head cover to cylinder head
10 Nm (89 in-lb)
- Remainder of reassembly is reverse of removal, noting the
following:
Secure all coolant hoses, thermostat housing, engine cool-
ant drains.
Install new engine oil filter and oil. See
119 Lubrication
System.
Refill and bleed cooling system as described in
170 Radi-
ator and Cooling system.
Use scan tool to check VANOS operation with engine
idling.
Tightening torques Coolant drain plug to cylinder block
25 Nm (18 ft-lb)
Radiator cooling fan (viscous clutch)
to coolant pump
40 Nm (30 ft-lb)
Radiator drain screw to radrator 2.5 Nm (22 in-lb)
Vibration damper hub to crankshaft 41 0 Nm
(300 ft-ib)
TIMING CHAIN
(M62 ENGINE TO 911998)
Timing chains, removing
(M62 engine to 911 998)
Camshaft timing chain removal requires that the engine oil
pan be removed.
Special
BMW service tools are needed for timing chain re-
moval and installation procedures. The special tools assure
propertiming of thevaivetrain. Precise marks to set the timing
on the camshafts are not provided for reassembly. Read the
procedures through before beginning the job.
CAUTION-
Special BMW service tools are needed for this procedure.
Read the procedure through before beginning the job. If the
camshafts are notproperly timed, the pistons can contact the
valves.

Downloaded from www.Manualslib.com manuals search engine
-
Camshaft Timing chain1
4 Remove oil lines from camshaft supports (arrows).
- Remove radiator cooling fan and fan shroud. See 170 Radi-
ator and Cooling System.
NOTE-
The radiator cooling fan nut (32 mm wrench) has left-hand
threads.
- Remove engine drive belts alternator and AlC compressor.
See
020 Maintenance.
4 Remove vibration damper bolts (arrows) and remove
damper.
4 Mount BMW special tool 11 2 450 to crankshaft hub while
aligning damper locator pin with hole (arrow) in special tool.
CAUTION-
Crankshaft center bolt is torqued to 410 Nm (300 ft-lb) use
BMWspecial tool I I 2 450 to secure crankshaft when remov-
ing center bolt.
- Loosen and remove cranltshaff center bolt.

Downloaded from www.Manualslib.com manuals search engine
I Camshaft Timins Chain
4 Using special tool 11 2 450, rotate engine clocltwise to TDC
with number one cylinder cam lobes facing each other (ar-
rows)
as shown.
4 Lock crankshaft in TDC position with BMW special tool 11 3
200 (arrow).
- Remove BMW special tool 11 2 450 and remove hub.
- Remove upper engine oil pan. See 119 Lubrication.
- Remove alternator. See 121 Battery, Starter, Alternator.
- Remove retaining bolt for oil dipstick tube from upper timing
chain cover on right side.
- Remove camshaft position sensor from right upper timing
chain cover.
< Remove right upper timing chain cover:
Remove chain tensioner
(A).
CAUTIOG
Tensioner is under spring tension. Release slowly. 1
Release fasteners (arrows) and remove cover

Downloaded from www.Manualslib.com manuals search engine
1 17-72
Camshaft Timing Chain
4 Working at right side cylinder head loosen Intake camshaft
sprocket bolts
(arrows).
4 Secure left and right side camshafts in TDC position:
Use BMW special tool set
11 2 440.
- If necessary, turn camshaft so that special tools are
squarely seated on cylinder head.
Working at left cylinder head loosen
intake camshaft
sprocket bolts
(arrows).
CAUTION-
Counter hold camshaft with a 27mm open-end wrench while
loosening sprocket bolts. Grind wrench
if necessary to pre-
vent damage to head.
Remove BMW special tool
11 2 300 from crankshaft locking
tool bore.

Downloaded from www.Manualslib.com manuals search engine
I Camshaft Timina Chain
/ Cylinders 5-8
Timing chains, installing
(M62 engine to 911 998)
4 The procedure outlined below assumes that the camshafts
are locked in the TDC installation position with special lock-
ing tools as shown earlier.
4 lnspect timing chain sprocltets and chain. Inspect guide rail
and tensioner rail
(arrows) for grooves caused by chain con-
tact. Replace any part that is worn or damaged.
NOTE-
If any sprocl(ets are being replaced due to wear, the chain
should also be replaced.
If the crankshaft sprocket requires
replacement, the oil pump
drive sprocket and chain must be
removed. See
119 Lubrication System for oilpump removal
information.
- If removed, reinstall timing chain tensioning rail, reversing
rail, and guide rail.
If tensioning rail was removed, replace O-ring at tensioning
rail oil guide.
Tightening torque Reversing rail
to engine block 14 Nrn (10 n-lb)
4 lnstall timing chain and intalte sprocket to intake camshaft on
left cylinder head. Center bores of camshaft flange in sprock-
et mounting slots. Install two mounting bolts finger tight.

Downloaded from www.Manualslib.com manuals search engine
Camshaft Timing Chain1
lnstall timing chain and intake sprocket to intake camshaft on
right cylinder head. While pressing in on chain tensioner rail,
confirm camshaft flange bores (arrows) are centered in
sprocket mounting slots.
NOTE-
Pressing in on rail will remove slack and reposition sprockets.
If
necessarx remove sproclets and align bores centrally.
lnstall intake camshaft sensor gear with notch upward (ar-
row) at right cylinder head.
- Finger tighten mounting screws.
- lnstall remaining sprocket bolts to intake camshaft finger tight
at left cylinder head.
- Press timing chain tensioning rail against timing chain. lnstall
plastic wire
tie, to hold rail against chain.
- lnstall lower timing chain cover:
Clean sealing surfaces and check sleeves are properly
seated.
Apply a thin coat of Three Bond 1209
8 to front and back
of new seal. Also coat joints where block meets cylinder
heads and oil pan.
Initially hand tighten bolts in alternate sequence to firmly
seat cover.
Tighten fasteners to final specification in alternate
sequence.
Tightening torques Lower timing cover
M6 bolts 10 Nrn (89 in-lb)
M7 bolts 15 Nm (1 1 ft-lb)
ME bolts 22 Nm (1 6 ft-lb)
M10 bolts 47 Nm (35 ft-lb)
- Replace radial seal in lower timing chain cover, then reinstall
crankshaft hub, center bolt, and vibration damper. See
Crankshaft oil seal, replacing
(M62 and M62 TU engines).
- lnstall oil pan with new gasket. See 119 Lubrication Sys-
tem.
- Lock crankshaft in place with BMW special tool 11 2 300

Downloaded from www.Manualslib.com manuals search engine
1 17-76
/camshaft Timing Chain
4 Attach BMW special tool 11 7 380 to right side cylinder head.
Install special tool
11 3 390 and 00 9 250 into 11 7 380. Tight-
en to 0.7 Nm (0.5 ft-lb).
4 Secure sprocket to intake camshaft flange on left cylinder
head.
Repeat for intake sprocket on right cylinder head.
Tightening torque Sprocltet to camshaft flange
15 Nm (1 1 ft-lb)
- Remove BMW special tools 11 2 4441 4431 4411 445 from
right cylinder head.
- Remove BMW special tools 11 2 4441443/421/446 from left
cylinder head.
4 Install oil lines on left and right cylinder head,
Tightening torque
Oil
lines to camshaft bearing caps 6 Nm (4 ft-lb)
- Relieve load on BMW special tool 11 3 390 and remove along
with special tool
11 7 380.
- Remove BMW special tool 11 2 300 from bore at transmis-
sion bellhousing and release crankshaft.