1999 BMW 528i vanos

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Engine identifying features
4 The M52 engine (MY97-98 528i) used a single on-off vari-
able intake valve timing system (called VANOS). The cylinder
block is cast iron and the cylinder head is aluminum. The en-
gine management system is Siemens MS 41
.I and features
NGK-type (0-5 volt) oxygen sensors.
NOTE-
VANOS is an acronym based on the German words Variable
Nocltenwellen Steuerung (variable camshaft timing).
4 The M52 TU engine (MY99-00 5281) and the M54 engines
(MY01-02 525il530i) are fitted with double VANOS. The en-
gine
blocits are constructed of aluminum alloy with cast iron
cylinder sleeves.
4 The double VANOS (variable camshaft control) system incor-
porates true variable control of both the
intake and exhaust
camshafts, as compared to the single VANOS system on the
M52 engine
(onloff control of the intaite camshaft only).
The M54 engines use a fully electronic throttle control (drive
by wire). There is no accelerator cable connecting the throttle
pedal to the throttle housing in these cars.

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100-4
I Engine-General
The M62 90" V8 engine uses four valves per cylinder, double
overhead camshafts and light alloy cylinder head and cylin-
der
bloclc engine construction.
On 1997 and 1998 540i models, Bosch engine management
systems are utilized. Table a lists engine management sys-
tem applications.
4 For the 1999 model year, the M62 TU VANOS engine was in-
troduced to the 540i models. This engine is primarily a carry-
over from the earlier M62 engine, but contains many unique
identifying components and technology:
Variable camshaft timing (VANOS) for the intake valves.
Bosch ME 7.2 engine management system with electronic
throttle control. There is no accelerator cable connecting
the throttle pedal to the throttle housing in these cars.
Compact water-cooled generator (alternator).
E39 vehicles are equipped with sophisticated self-diagnostic
engine management systems. These systems monitor and
store diagnostic fault information. If the malfunction indicator
lamp (MIL) illuminates, the first diagnostic test should be to
connect a dedicated scan tool for BMW automobiles and in-
terrogate the fault memory.
If the malfunction indicator light (MIL) comes on orflashes, it
indicates that an emissions-related fault has occurred and
that fault information is stored in memory within the ECM.
4 The MIL in E39 cars displays one of these warning graphics
in the instrument cluster.
The diagnostic capabilities of these systems have the poten-
tial to save hours of diagnostic time and prevent incorrect
5 placement. See OBD On-Board Diagnostics.

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Engine Removal and lnstallationl
< Remove positive battery cable and intake manifold cover:
Remove protective cover from positive (+)jump start post
(4.
Loosen and remove battery lead mounting nut.
Remove lead and push down through intake manifold
Remove trim covers
(arrows) from fuel injector cover.
Remove cover hold down bolts and lift off cover.
Working above engine, disconnect the following:
Vent line from cylinder head cover (A).
M52 engine: Oxygen sensor connectors (8).
Electrical harness connector from intalte camshaft VANOS
solenoid valve
(C).
M52 engine: Disconnect electrical harness connectors at
throttle valve position switch
(D), ASC valve position switch
(E), fuel injector harness (F) and vent valve (G).
CAUTION-
Be sure to mark oxygen sensor harness connectors so that
they can be reassembled correctly Do not interchange con-
nectors.
4 M52 TU, M54 engine: Disconnect fuel injector electrical con-
nectors from injectors.
Use small screwdriverto pry one corner of wire lock clip on
fuel injector
1 connector.
Repeat for all injectors.
Lifl off connector loom and lay aside.

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113-1
11 3 Cylinder Head
Removal and Installation
General ........................... .I 13-2
Special tools ........................ .I 13-2
Diagnostic Testing. ................ .I1 3-5
Cylinder compression, checking ......... ,113-5
Wet compression test ................. .I1 3-7
Cylinder leak-down test. ................ 11 3-8
Cylinder Head Removal and Installation
(M52 Engine) ...................... .I1 3-8
Cylinder head, removing, M52 engine .... ,113-8
Cylinder head, installing, M52 engine ... ,113-17
Cylinder Head Removal and Installation
(M52 TU and M54 Engines). ........ ,113-22
Cylinder head, removing, M52 TU
and
M54 engines. ................... .I1 3-22
Cylinder head, installing, M52 TU
and
M54 engine. .................... .I1 3-39
Double VANOS Timing
Chain Components
................ 11 3-46
Double VANOS timing chain components,
installing,
M52 TU and M54 engines ..... 113-46
Cylinder Head Removal and Installation
(M62 Engine). ..................... 11 3-56
Intake manifold, removal and installation,
M62 engine. ........................ 11 3-66
Left cylinder head, removing,
M62 engine. ........................ 11 3-61
Left cylinder head, installing,
M62 engine. ........................ 11 3-66
Right cylinder head, removing,
M62 engine ........................ 11 3-72
Right cylinder head, installing,
M62 engine ........................ 11 3-77

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11 3-2
Cylinder Head Removal and Installation
This group covers cylinder head removal and installation as
well as cylinder
headlvalve diagnostic procedures.
In the procedures in this repair group, engines are referred to
by engine code. If necessary, see
100 Engine-General for
engine code and application information.
The information given in this repair group assumes that the
engine is installed in the engine bay. On the
6-cylinder en-
gines, the VANOS control unit must be removed in orderto re-
move the cylinder head from the engine block. On
M52TU
and M54 engines, camshafts must be removed from the cylin-
der head before the head is removed.
The cylinder head removal and installation procedures for the
M62 V-8 are also included, butthe proceduresforthe M62TU
V-8 with VANOS are not provided.
For cylinder head and valvetrain reconditioning information,
see
116 Cylinder Head and Valvetrain.
For specific repair procedures, refer to the appropriate repair
group:
020 Maintenance
116 Cylinder Head and Valvetrain
117 Camshaft Timing Chain
170 Radiator and Cooling System
610 Component locations
NOTE-
If a head gasket problem is suspected, a compression test or
leak-down test will usually detect the fault See Diagnostic
Testing later
in this group.
Special tools
Special BMW service tools are required to properly remove
and install the cylinder head on engines covered by this man-
ual. The special tools are used to time the valvetrain to the
crankshaft, and to remove the VANOS control unit, the cam-
shafts and the
Tom (El2) head bolts. Read the entire proce-
dure through before beginning the job.

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11 3-3
Cylinder Head Removal and Installation
4 Rotary angle torque dial gauge
(Tool No. BMW
11 2 250100 9 120)
4 El2 Torx socket for cylinder head bolts
(Tool No.
BMW 11 2 250)
4 Crankshaft loclting tool
(Tool No.
BMW 11 2 300)
4 Camshaft locking tool set, 6-cylinder
/I (Tool No, BMW 11 3 240)
< Timing chain adjustable tension setup tool, 6-cylinder
(Tool No.
BMW 11 4 220)
>
Double VANOS adiustment date
4 Secondary sprocket setup tool for double VANOS
(Tool No. BMW
11 6 180)

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113-5
Cylinder Head Removal and Installation I
< Fuel line plugs
(Tool No.
BMW 13 5 281113 5 282)
4 Fuel line removal tool for quick-disconnect fittings
(Tool No.
BMW 16 1 050)
< Tensioning bracket (V-8)
(Tool No. BMW 11 7 380)
Compressed air fitting for testing VANOS operation
((Tool No.
BMW 11 3 450)
< Upper timing cover installation tool set, V-8
(Tool No. BMW 11 1 41 0)
Cylinder compression, checking
A compression gauge is needed to make a compression test.
For accurate test, the battery and starter must be capable of
cranking the engine at least
300 rpm, and the engine should
be at normal operating temperature.
NOTE-
Performing a compression test may cause a fault to set in the
ECM and may illuminate the Malfunction
Indicator Light
(MIL). The light can only be turned out using either
BMW
special service scan tools or an equivalent aftermarket scan
tool. Disconnecting the battery will not erase the fault memo-
ry or turn out the light. See OBD On-Board Diagnostics.

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113-10
Cylinder Head Removal and Installation
4 Working above engine, disconnect the following:
Vent line from cylinder head cover
(A).
. Oxygen sensor connectors (B).
Electrical harness connector from VANOS solenoid
valve
(C).
Electrical harness connectors at throttle valve position
switch
(D), ASC valve position switch (E), fuel injector har-
ness
(F) and vent valve (G).
CAUTION-
Be sure to mark oxygen sensor harness connectors so that
they can be reassembled correctly Do not interchange con-
nectors.
4 Where applicable, remove schraeder valve cap (arrow) from
air connection on fuel rail. Using a tire chuck, blow fuel back
through feed line using a brief burst of compressed air (max-
imum of
3 bar or 43.5 psi).
WARNING-
. Fuel in fuel line is underpressure (approx. 3 - 5 bar or 45 -
75 psi) and may be expelled. Do not smoke or work near
heaters or other fire hazards. Keep a fire extinguisher
handy Before disconnecting fuel hoses, wrap a cloth
around fuel hoses to absorb any leaking fuel. Catch and
dispose of escaped fuel. Plug open fuel lines.
- Always unscrew the fuel rank cap ro release pressure
;n the tank before working on the tank or lines.
Disconnect fuel lines by sliding locking collar in (arrows) and
pulling lines apart.
NOTE-
BMW uses three styles of fuel line connections; a one-time
use
clamp; a locking fitting that uses BMWspecial tool 16 1
050 to release; and a quick release sleeve (above) that dis-
connects the line when depressed.