2000 BMW 528i Tensioner

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Cylinder Head Removal and Installation 1
Replace sealing O-ring (arrow) in right cylinder head before
installing upper timing chain cover.
4 Install oil supply lines and mounting nuts on both heads (ar-
rows).
- Using a new gasket, install upper timing chain cover on right
head and tighten cover fasteners finger tight.
4 Remove right cylinder head cover gasket and install spacing
tool
(BMW 11 1 41 1) in place of gasket.
- Install right cylinder head cover fasteners and tighten uni-
formly in
'1, turn steps.
Tightening torque Cylinder head cover fasteners
10 Nm (7.5 ft-lb)
- Tighten right upper timing cover retaining fasteners in two
passes.
I Tightening torque
Upper timing chain cover
10 Nm (7.5 ft-lb)
- Reinstall primary timing chain tensioner with new sealing
washer.
Tightening torque
Chain tensioner to timing cover
65 Nm (48 ft-lb)
- Remove right cylinder head cover and remove special spac-
ingtooi 11 4411.

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/cylinder Head and Valvetrain
Secondary timing chain tensioner locking pin set (6-cylinder)
- 4 Secondary timing chain tensioner locking pin (V-8)
(Tool No. BMW
11 3 310)
4 Adjustable primary timing chain tensioner tool (V-8)
(Tool No. BMW
11 3 390)
4 Camshaft installation tool (V-8)
(Tool No.
BMW 11 3 430)
4 VANOS compressed air fitting
7 (Tool No. BMW 11 3 450)
Adjustable primary timing chain tensioner tool (6-cylinder) (Tool No. BMW
11 4 220)

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11 6-5
I Cylinder Head and valvetrain1
4 Timing chain tensioner bracket (V-8)
(Tool No. BMW
11 7 380)
CYLINDER HEAD
This section provides the specifications and special recondi-
tioning information necessary to repair the cylinder heads
covered by this manual.
The disassembled cylinder head should be inspected for
warpage and cracks. Check the valve guides and valve seats
for wear before machining a warped head. Always decarbon-
ize and clean the head before inspecting it.
Visually inspect the cylinder head for craclts.
If a cracked cyl-
inder head is suspected and no
craclts are detected through
the visual Inspection, have the head further tested for cracks
by an authorized BMW dealer or an ASE certified machinist.
A cracked cylinder head must be replaced.
NOJE-
When disassembling and inspecting the cylinder head, be
sure to
checlc the camshaft carrier bearing surfaces using a
straight edge for
warpage, and check the lifter bores for wear.
A high-quality straight edge can be used to
checlc for
warpage. A warpage of 0.05 mm (0.002 in.) is acceptable
without machining. A warped cylinder head can be machined
provided no more than 0.3
mm (0.012 in.) of material is re-
moved.
If further machining is required, the head should be
replaced. Removing more than this amount will reduce the
size of the combustion chamber and adversely affect engine
performance. A 0.3 mm
thicker head gasket for machined
heads is available from an authorized BMW parts depart-
ment.

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116-14
I Cylinder Head and Valvetrain
4 Remove sensor gear (arrow).
Remove secondary timing chain tensioner retaining bolts
(arrows) and remove tensioner.
Remove timing chain guide
reta~ning bolts (arrows) and
remove guide.

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116-15
Cylinder Head and Valvetrain
4 Remove primary timing chain tensioner plug (arrow) and pri-
mary tensioner.
CAUTION-
Primary timinq chain tensioner is under sarina aressure.
4 Remove primary timing chain sprocket and timing chain from
exhaust camshaft.
- Remove crankshaft locking tool (BMW 11 2 300) from
flywheel (installed during
VANOS removal).
Lift timing chain (holding under tension) and rotate engine
counterclockwise 30" from
TDC.
- Suspend timing chain with mechanic's wire

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Cylinder Head and valvetrain1
- Remainder of installation is reverse of removal, noting the
following:
See
117 Camshaft Timing Chain for VANOS control unit
installation.
Tightening torques
Camshaft bearing caps
to cylinder head (M7) 15 Nm (1 1 ft-lb)
Cylinder head cover to cylinder head (M6) 10 Nm (89 in-lb)
Sparic plugs (M12) 23 Nm (17 ft-lb)
Camshaft and lifter, removal and
installation
(M52 TU and M54 engine)
Camshafts and lifters, removing
(M52 TU and M54 engine)
WARNING-
Allow engine fo cool before beginning this procedure.
- Disconnect negative (-) cable from battery.
CAUTION--
Prior to disconnecting the battea read the battery discon-
nection cautions in
001 General Cautions and Warnings.
Remove VANOS control unit. See 117 Camshaii Timing
Chain.
Remove primary timing chain tensioner (arrow).
CAUTION-
Primary timing chain tensioner is under spring pressure. 1

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/Cylinder Head and Valvetrain
Press down on secondary chain tensionerand loclc into place
using
BMW special tool 11 3 292, or a thin drift or pin.
4 Remove exhaust camshaft impulse wheel mounting nuts
(arrows). Remove impulse wheel (A).
< Remove spring plate (A).
4 Remove intake camshaft sprocket mounting nuts (arrows)
and remove spring plate (labelled
FRONT).

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11 6-22
Cylinder Head and Valvetrain
Remove secondary chain tensioner mounting bolts (arrows)
and remove tensioner with locking tool in place.
Remove primary chain sprocket mounting studs
(arrows) on
exhaust camshaft.
NOTE-
Counterhold camshafts when loosening.
Lifl primary chain sprocket off exhaust camshaft. Remove
sprocket from chain.