1999 BMW 528i Radiator system

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-- Camshaft Timing Chain -- -
Tightening torque
Vibration damper hub to crankshaft
410 Nm (300 ft-lb)
4 Install cranltshaft hub and vibration damper while aligning
locating hole (arrow) in damper with dowel pin in hub.
Tightening torque
Vibration damper and
pulley to
cranltshaft hub
22 Nm (17 ft-lb)
- Turn engine over by hand in direction of rotation at least two
full rotations. Reinstall camshaft and crankshaft locking
toois
to recheck engine timing. Remove locking tools if no faults
are found.
- Remove BMW special tool 11 3 390 (dummy tensioner) from
side of cyiinder head.
- Install primary chain tensionerso that cutout in tensioner pis-
ton engages chain rail.
Tightening torque
Timing chain tensioner to tensioner sleeve
70 Nm (52 ft-ib)
- Install cylinder head cover mounting studs, camshaft cover,
and cylinder head cover.
Tightening torque Cylinder head cover to cyiinder head
M6 nut 10 Nm (89 in-lb)
MB bolt 22 Nm (17 ft-lb)
- installation of remaining parts is reverse of removal, noting
the following:
When installing thermostat, make sure arrow or vent hole
faces up, if applicable.
Refill cooling system as described in
170 Radiator and
Cooling System.
Fill engine with oil and install new
oil filter as described in
020 Maintenance.
Tightening torque Upper timing chain cover to cylinder head
M6 nut 10 Nm (89 in-lb)
MB bolt 22 Nm (17 ft-lb)
VANOS oil supply pipe to VANOS control
unit banjo bolt
32 Nm (24 ft-ib)

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Camshaft Timing Chain
VANOS control unit, removing
(M52 TU and M54 engines)
This procedure includes removal of the Double VANOS con-
trol unit.
NOTE-
If the Double VANOS control unit is being replaced, camshaft
timing must be checked. This procedure requires multiple
special tools. Be sure to read the procedures through before
beginning the repair.
- Working inside luggage compartment, disconnect negative
(-) battery cable.
Prior to disconnecting the
batteg read the battery discon-
nection cautions given in
001 General Cautions and
Remove engine cooling fan assembly. See 170 Radiator
and Cooling System.
Remove engine trim covers.
Pry out plastic trim caps (arrows).
Remove cover fasteners, oil filler cap, and covers.
Remove ignition coils:
Disconnect ignition coil electrical harness connectors.
Remove coil mounting fasteners and coils.
NOTE-
Make note of ignition coil ground strap locations.
Remove spark plugs,

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... -.
Camshaft Timing chain1
Timing chains, removing
(M52 TU and M54 engines)
Camshaft timing chain removal requires that the oil pan be re-
moved. See
119 Lubrication System. Also required is re-
moval of the VANOS control
unit and disassembly of the
intake and exhaust camshaft sprocket assemblies as de-
scribed earlier in this repair group.
Special BMW
service tools are needed for timing chain re-
moval and installation. The special tools assure proper timing
of the valvetrain. Precise
marlts to set the timing on the cam:
shafts are not provided for reassembly. Read the procedures
through before beginning the job.
CA
UTION-
If the camshafts are not properly timed, the pistons can con-
tact the valves.
- D~sconnect negative (-) cable from battery.
CAUTION-
* Disconnecting the battery may erase fault code@) stored in
control module memory. Check for fault codes using spe-
cial
BMW diagnostic equipment.
Prior to disconnecting the battery, read the battery dis-
connection
cautfons given in 001 General Cautions
and
Warninqs.
- Remove VANOS control unit. See VANOS control unit, re-
moving
(M52 TU and M54 engines).
Remove sealing plug from crankcase below starter and se-
cure crankshaft with
BMW special tool ll 2 300.
Drain engine cooling system. See 170 Radiator and Cool-
ing System.
Remove belt driven cooling fan, fan shroud, and thermostat
housing. See
170 Radiator and Cooling System.
Remove drive belts. See
020 Maintenance.
NOTE-
Mark direction of belt rotation if reusing belt.
- Remove water pump pulley fasteners and pulley.
- Drain engine oil and remove oil pan as described in 119
Lubrication System.

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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.

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-
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.

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Camshaft Timing chain1
< Remove Automatic Stability Control (ASC) throttle body:
Disconnect electrical harness from throttle position sensor.
Disconnect ASC actuator cable (arrow).
Remove
3 mounting fasteners and remove throttle body.
4 Disconnect fuel tank vent valve line and cap off line (arrow).
- Drain engine coolant and remove hoses from thermostat
housing. See
170 Radiator and Cooling System.
- Remove water pump and thermostat housing. See 170 Ra-
diator and Cooling System.
- Remove left side upper timing chain cover retaining bolts and
remove cover.
4 Counter hold right intake camshaft
CAUTION-
Counter hold camshaft with a 27mm open-end wrench while
loosening sprocket bolts. Grind wrench if necessary to pre-
vent damage to head.

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Battery, Starter, ~lternatorl
Alternator, removing and installing
(6-cylinder engine)
A replacement alternator should have the same rating as the
original. Alternator manufacturer and ampere rating are nor-
mally marked on the alternator housing.
- Disconnect negative (-) battery cable.
CAUTION-
Prior to disconnecting the batteg read the battery discon-
nection cautions given
in 001 General Warnings and Cau-
I tions.
Remove complete air filter housing:
Loosen intake duct hose clamp
(A) at throttle assembly.
Loosen clamp and remove idle control hose from intake
duct
(B) and disconnect idle speed control valve electrical
harness connector.
Disconnect electrical harness connector
(C) from mass air
flow sensor.
* Remove air filter housing mounting screw (D),
Disconnect vent tube (E).
Loosen air intake duct clamp (F).
Carefully lifl air filter housing out of engine bay.
Remove alternator drive belt. See belt removal procedures in
020 Maintenance.
- 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.
- Unbolt power steering fluid reservoir and bracket. Suspend to
one side without detaching fluid hoses.
- Disconnect alternator air cooling tube.
- Disconnect wiring from rear of alternator.
'4 Remove upper and lower mounting bolts (arrows) and lift
alternator.
If idler pulley for belt interferes, remove pulley cover and
retaining bolt to remove pulley. out

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121-18
I Battery, Starter, Alternator
Alternator, removing and installing
(M62 TU engine, water cooled)
V-8 models produced after 9/98 are equipped with a water
cooled alternator.
CAUTION-
Allow engine to cool before removing alternator as coolant
will
escape from the alternator water jacket.
- Disconnect negative (-) battery cable
CAUTION- Prior to disconnecting the
battew read the battery discon-
nection cautions given in
001 General Warnings and Cau-
tions.
- Remove radiator cooling fan and fan shroud. See 170 Radi-
ator and Cooling System.
- Drain engine cooling system. See 170 Radiator and Cool-
ing System.
- Remove alternator drive belt. See 020 Maintenance.
- Disconnect battery lead (terminal 30 or B+) and two-pin har-
ness connector from front of alternator.
I < Remove bolts securing alternator to water jacket and remove
aling ring
alternator.
NOTE- If necessary, raise car and remove engine compartment
splash shield to access lower alternator mounting bolts.
The upper coolant hose can also
be removed to assist al-
ternator removal.