Car engin BMW 528i 1997 E39 Manual Online

Downloaded from www.Manualslib.com manuals search engine
..--.
I Cylinder Head and Valvetrain - I
4 Lift primary chain and hold under tension, rotate engine
against direction of rotation (counterclockwise) approximate-
ly 30".
To prevent damaging valves while
worlcing on camshafts, no
aistons should be in the TDC position.
- Remove BMW special tool set 1 I 3 240 from rear of cylinder
head.
Remove retaining nuts (arrows) and bearing cap
1 of intake
camshaft.
Intake camshaft bearing cap
1 is centered with adapter
sleeves. To avoid camshaft damage, it must be removed be-
fore anv other caos.
4 Fit BMW special tools 11 3 260 (A) and 11 3 270 (B) to cylin-
der head and screw long bolts (aiiows) into spark plug
threads. Tensioners will align with the bearing caps on the in-
take camshaft.
CA UTION--
Do not over torque bolts into spark plug holes. 1
4 Turn eccentric shaft of special tool to pretension intake carn-
shaft bearing caps. Remove nuts on remaining bearing caps.
- Slowly release tension on eccentric shaft and remove BMW
special tools. Remove bearing caps and set aside in order.
Remove camshaft and store safely.
CA U TIOW-
Camshaft bearing caps must be installed in their original lo-
cations.

Downloaded from www.Manualslib.com manuals search engine
Cylinder Head and Valvetrain
NOTE-
The camshaft bearing caps are coded with a letter and a
number. For example, "A
1" is the first exhaust camshaft
bearing cap
at the front of the engine, and "El "is the intake
camshaft bearing cap at the front of the engine.
-. -
The camshafts are stamped with a code letter - "E for the
intake side and
'X" for the exhaust side.
"E is for Einlap. (German for intake) and 'XA7s for Auspuff.
(German for exhaust).
- Repeat procedure for exhaust camshaft
< Secure hydraulic lifters in lifter bores using BMW special tool
11 3 250, or remove lifters using a magnetic pick-up tool.
I CAUTION-
Used liydraulic lifters must be reinstalled in original lifter
1 bores.
4 Remove lower camshaft bearing carriers from cylinder head.
CAUTION- Camshaft bearing carriers must be reinstalled in their original
locations
(E for intalce and A for exhaust).
NOTE- Do not allow hydraulic lifters to fall out of camshaft carriers.
Hydraulic lifters should be stored in an upright position.
Camshafts and lifters, installing (M52TU and M54 engine)
Lubricate camshafts, camshaft carriers, bearing caps, hy-
draulic lifters, friction washers, splined shafts and
spline hubs
with assembly
lubricant before installation.
CAUTION-
Make sure the crankshaft, which had been rotated approxi-
mately
30" opposite the direction of engine rotation from
TDC, is
stillin thatposition before lowering the camshafts into
position. Allpistons must be out of
TDCposition to prevent
valve/piston inteiference when the carnshafis are installed.
- Lift timing chain and place exhaust cam onto exhaust cam-
shaft carriers. Place
intake camshaft on camshaft carrier.

Downloaded from www.Manualslib.com manuals search engine
11 6-26
I Cylinder Head and Valvetrain
4 Before installing camshaft carriers, examine bearing bores
(arrows) on hydraulic lifter bores for signs of wear.
Install camshaft carriers with hydraulic lifters into cylinder
head. Note marks on carriers:
(E) for intake side and (A) for
exhaust side.
4 Center camshaft carrier on pins (arrows) at bearing
aositions 2 and 7.

Downloaded from www.Manualslib.com manuals search engine
11 6-32
Cylinder Head and Valvetrain
4 Install secondary chain tensioner (arrows). Keep tensioner
compressed using
BMW special tool 11 3 292 or suitable pin.
4 Fit exhaust camshaft splined sleeve. Confirm that gap in
sleeve splines aligns with corresponding gap in carnshaft
splines
(arrows).
Slide splined shaft onto exhaust camshaft so that locating
tooth of shaft fits into spline gaps of camshaft and splined
sleeve
(arrows).
- Push splined shafl in further to rotate splined sleeve until the
three threaded holes in primary chain sprocket are centered
in the small slots of the splined sleeve.

Downloaded from www.Manualslib.com manuals search engine
Cylinder Head and valvetrain1
< Place intake and exhaust sprockets in BMW special tool
11 6 180. Position spline gap on intake sprocket (arrow) as
shown and place secondary chain on
sprocitets.
< Remove chain and sprockets from tool and slide sprockets
on camshafts. Confirm that gap in intalte sprocket splines
lines up with corresponding gap in camshaft splines (arrow).
CAUTIOI\C
Do not alter position of sprockets with respect to chain when
removinq from saecial tool 11 6 180.
4 While aligning locating tooth of shaft with spline gaps on
camshaft and sprocket, slide spiined
shaft onto intalte carn-
shaft until approx. 1 mm (0.04 in.) of splines (arrows) are
visible.
4 lnstall intake camshaft spring plate so that FRONT mark is
visible. install mounting nuts (arrows) finger tight.

Downloaded from www.Manualslib.com manuals search engine
/Cylinder Head and Valvetrain
4 Insert sprocket mounting bolts (arrows) on exhaust side
carnshaft assembly.
Initially tighten to approx.
5 Nrn (44 in-lb) and then back off
by half a turn.
4 Fit thrust spacer (A) on exhaust
camshaft.
4 Install spring plate (A) to exhaust camshaft. Make sure that
(F) mark is visible.
NOTE-
If F marlc is no longer visible, install spring plate as shown in
inset.

Downloaded from www.Manualslib.com manuals search engine
1 16-36
I Cylinder Head and Valvetrain
4 Preload exhaust camshaft spring plate by pressing on im-
pulse wheel while tightening mounting nuts (arrows)
fingel
tight.
4 Install BMW special tool 11 6 150 (VANOS setup bracket) to
front of cylinder head timing case. Install nuts (arrows) finger
tight, then tighten down uniformly until special tool is in full
contact with cylinder head.
CAUTION--
Male sure aNgas1ef material Is removed from face of cyiin-
der head. Clean sealing face and keep free of oil.
4 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 (B) on exhaust and intake sprocket
assemblies to approx.
5 Nm (44 in-lb).
Torque down mounting screws (A) and nuts (B) to final
specifications.
Tightening torques Sprocket assembly to camshaft initial torque
5 Nm (44 in-lb)
Sprocket assembly wheel to carnshaft
M7 tom screws (A) 20 Nm (15 ft-lb)
M6 mounting sciew (6) I0 Nm (8 ft-lb) - - -
- - Remove crankshaft locking tool from crankcase.
- Remove camshaft locking tools from cylinder head.

Downloaded from www.Manualslib.com manuals search engine
Cylinder Head and valvetrain1
4 Remove camshaft position sensor (A) from timing chain cov-
er. Remove bolts
(arrows) from timing chain covers and re-
move covers from right and left cylinder heads.
4 Counterhold intalte carnshaft on right cylinder head
4 Counterhold right intalte camshaft and remove sprocltet
mounting bolts
(arrows) from right cylinder head.
Remove carnshaft impulse wheel and primary chain
sprocket.
- Slide primary timing chain off sprocltet and suspend chain
with stiff wire to prevent it from dropping into lower timing
chain cover.

Downloaded from www.Manualslib.com manuals search engine
1 16-56
Cylinder Head and Valvetrain
This section covers valve removal and reconditioning, includ-
ing valve guides, seats, springs, and valve stem oil seals.
Valves, leak test
To test the valves for leakage, the cylinder head must be dis-
assembled with camshafts and camshaft carriers removed.
With valve assemblies and spark plugs installed, place the
cylinder head on a workbench with the combustion chamber
facing upward. Fill each combustion chamber with a thin non-
flammable liquid. After fifteen minutes,
check the level of the
fluid. If the fluid level in any cylinder drops, that cylinder is not
sealing properly.
Valves, removing and installing
- Remove cylinder head as described in 113 Cylinder Head
Removal and Installation.
CAUTIOI\C
(M52 TU/M54 engines only) Do not let the hydraulic lifters
fall out as the camshaft carrier is removed. Special suction
cups are available from
BMW to hold the hydraulic lifters in
place during carrier removal.
* Hydraulic cam lifters should be stored m an uprfght po-
sition. If necessary, use a magnetic tool to
aidin remov-
al of the lifters.
- Remove valves using a valve spring compressor.
CAUTIOI\C
Label each valve assembly as it is removed so it can be in-
stalled in its original position.
-
- Remove and discard valve stem oil seals from valve guides.
See Valve stem oil seals later in this section.
- Valve installation is reverse of removal. Remove carbon de- - -
posits from the valves using a wire brush or wire wheel. -
-
Valve specifications are listed in Table c. Valve specifica-
tions.

Downloaded from www.Manualslib.com manuals search engine
1 17-2
Camshaft Timing Chain
This repair group covers timing chain and VANOS repair
information for the following engines:
M52 (Single VANOS 6-cylinder engine)
M52
TU and M54 (Double VANOS engines)
M62 (Non VANOS
V-8 engine)
NOTE-
The M62 TU V-8 engine with VANOS Variable Camshaft
Timing repair information is not included.
NOTE-
See 100 Engine General for engine code and application
information.
Worn timing chains and sprocltets can lead to noisy operation
and erratic valve timing. Afaulty tensionercan also cause tim-
ing chain noises.
For specific repair procedures, refer to the appropriate repair
group:
020 Maintenance
113 Cylinder Head Removal and Installation
119 Lubrication System
121 Ignition System
170 Radiator and Cooling System
Special tools
Special BMW service tools are needed to perform the service
and repairs procedures covered in this repair group. Many of
these tools are expensive and only available through an au-
thorized BMW dealer. Be sure to read each procedure thor-
oughly before starting a job to determine which special tools
will be necessary.
In addition, Double VANOS system diagnosis can only be
carried out by using BMW specific electronic scan tools, such
as BMW
DISplus, MoDiC or equivalent.
4 Torque wrench wl flex extension
(Tool No. BMW 00
9 250)