1998 BMW 540i Camshaft position

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11 3-68
Cylinder Head Removal and Installation
< Using BMW special tool 11 3 430, or a 27 mm open-ended
wrench, rotate camshafts to cylinder 1
TDC position (until
markings point upwards).
I I < Install camshaft locltina tool set (BMW soecial tool set 11 2
440) on right cylinder head (cylinders 1-4). Fit on cylinde~
head without gaps.
Install
camshaft locking tool set (BMW special tool set 11 2
440) on left cylinder head (cylinder head 5-8). Fit on cylinder
head without gaps.
4 Using crankshaft center bolt, rotate engine clockwise from
the
45" mark to TDC position (OIT aligns with casting mark
on cylinder block).

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11 3-69
Cylinder Head Removal and Installation
4 Lock crankshaft in TDC position with BMW special tool 11 3
200 (arrow).
NOTE-
Boss for special tool 11 3 200 located at rear of engine oil
pan.
4 Working at left cylinder head (driver's side) fit primary sprock-
et and chain to camshaft flange, centering threaded bores.
Insert bolts (arrows) and hand tighten.
?-I I 4 Install BMW special tool 11 3 390 into right timing case cover.
NOTE-
BMW special tool 00 9 250 is a flexible shaft torque wrench.
I - Tighten sprocket retaining bolts in the following order:
All bolts on left cylinder head exhaust camshaft
3 accessible bolts on right cylinder head exhaust camshaft
All bolts on left cylinder head
intake camshaft
3 accessible bolts on right cylinder head intake camshaft r"".."..7n
Tightening torques
Sprocltet bolts to camshait flange
15 Nm (11 ft-lb)
- Remove camshaft and crankshaft locking tools from engine.
- Using crankshaft center bolt, turn engine clockwise to access
remaining sprocket retaining bolts of right cylinder head cam-
shafts. Tighten remaining bolts.
Tightening torques Sprocket bolts to camshaft flange 15 Nm
(11 ft-lb)

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11 3-74
Cylinder Head Removal and Installation
4 Work at left side cylinder head loosen three accessible cam- shaft sprocket fasteners (arrows) on both intake and exhaust
camshafts approximately
'I2 turn.
Toprevent valve
topiston contact, counterholdcamshaft with
27 mm open-end wrench whenever loosening or tightening
camshaft sprocket fasteners. If
necessarq! grind outer side of
wrench jaws to prevent damaging cylinder head.
4 Rotate crankshaft one complete rotation to TDC overlap.
Right (passenger's side of engine) side camshaft lobes for
number one cylinder should be in overlap position as shown
(arrows).
4 Working at left cylinder head, loosen remaining sprocket fas-
teners (arrows) on both
intake and exhaust camshafts ap-
proximately
'I2 turn.

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1 13-75
Cylinder Head Removal and Installation I
4 Loosen and remove primary timing chain tensioner (arrow)
from right cylinder head.
Remove camshaft position sensor (arrow)
chain cover on right cylinder head.
Remove dip
stick tube support fastener. from
upper
Remove upper timing chain cover fasteners
(A) and
cover from right cylinder head. timing
remove

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Cvlinder Head Removal and Installation /
Right cylinder head, installing, M62 engine
- Clean cylinder head and block sealing surfaces of gasket de-
bris, making sure no debris drops into coolant or oil passag-
es.
CA UTIOW-
To prevent valve to piston contact when tightening camshaft
sprocket fasteners, counterhold camshaft with
27 mm open-
end wrench. If
necessarq: grind outer side of wrench jaws to
prevent damaging cylinder head.
- Check cylinder head bolt holes and condition of threads. Re-
move debris and liquids from holes.
4 Check cylinder head locator sleeves (arrows) for damage
CAUTION-
lithe cylinder head has been machined, a special 0.3 rnm
(0.01 1 in.) thickergasket should be installed. The thickergas-
ket is available through an authorized BMW dealer and
should be marked
accordinglw
- Place new cylinder head gasket over locating sleeve on
block.
< The word "OBEN" or "TOP (arrow) printed on the gasket.
must face up.
CAUTION-
Male sure the crankshaft, which had been rotated approxi-
mately
45" opposite the direction of engine rotation from
TDC, is
stillin thatposition before installing the cylinder head.
All pistons must be out of
TDCposition to prevent valve/pis-
ton contact
- Install new cylinder head bolts and washers finger tight. Be
sure not to remove coating from bolts.
4 Tighten cylinder head bolts in correct sequence (1 -10) to
stage
1 torque values.

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-8" ."
Cylinder Head Removal and Installation --
Using crankshaft center bolt, rotate engine clockwise from
the
45" before TDC up to TDC position (OIT aligns with cast-
ing mark on cylinder block).
< Lock crankshaft in TDC position with BMW special tool 11 3
200 (arrow).
NOTE-
Special tool boss located at the rear of upper engine oil pan.
- Working at right cylinder head (cylinder 5-8) fit primary
sprocltet and chain to camshaft flange.
!
I
4 Press timing chain tensioner rail against timing chain (white
arrow) to check that fastener holes are centered in sprocket
slots (black arrows).
NOTE-
If necessary, remove sprocl Fit sensor gear with mark pointing up (arrow).
Insert bolts and hand tighten.

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Cylinder Head and Valvetrain
4 Secure hydraulic lifters in lifter bores using BMW special tool
11 3 250, or remove lifters using a magnetic pick-up tool.
4 Remove camshaft bearing carrier from cylinder head.
CA UTION-
Camshaftbearing carriers must be reinstalledin their original
/ locations (E for ir;fal NOTE-
Do not let hydraulic lifters fall out as the camshaft carrier is
removed.
Hydraulic lifters should be stored in an upright position.
Used hydraulic lifters
must be replaced into original lifter
bores.
Camshafts and lifters, installing
(M52 Engine)
Lubricate camshafts, camshaft carriers, bearing caps, hy-
draulic liflers, friction washers, splined shafts and spline hubs
with assembly lubricant before installation.
Make sure
the cranltshaft, which had been rotated approxi-
mately
30" opposite the direction of engine rotation from
TDC, is still in thatposition before lowering the
camshaffs into
position. All pistons must be out of TDC position to prevent
valve/piston interference when the camshalts are installed.
Before installing camshaft carriers, examine bearing bores
(arrows) on hydraulic lifter bores for signs of wear.

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I_
-.
Cylinder Head and Valvetrain
Remove torx
(arrows). screws
from
exhausl
: camshaft : sprocket
Lift off exhaust and intalte sprockets together with secondary
chain, thrust spacer
(A) from exhaust camshaft, and splined
shaft (B) from intake camshaft.
CAUTIOf+
Splined shafts share the same part number for both intake
and exhaust camshafts. Used splined shafts must be rein-
stalled in their
oriqinal locations.
Place intalte and exhaust sprockets in
BMW special tool 11 6
/ 180. Position spline gap on intake sprocket (arrow) as
shown.
4 Remove exhaust camshaft splined sleeve (A) and shaft (B).