1997 BMW 540i engine removal

Downloaded from www.Manualslib.com manuals search engine
240-1 0
Automatic Transmission
TRANSMISSION REMOVAL AND
INSTALLATION
Removal and installation of the transmission is best accorn-
plished on an automotive lift using a transmission jack. Use
caution and safe workshop practices when working beneath
car and lowering transmission.
Torx-head bolts are used to mount the transmission to the
bellhousing.
Besure to have appropriate tools on hand before
starting the job.
WARNING-
Be sure the vehicle is properly supported. The removal of the
transmission may upset the balance of the vehicle on a lift
CAUJION-
Tilting the engine to remove the transmission can lead to
damaae to various components due to
laclc of clearance. 1
Transmission, removing and installing
WARNING -
Allow engine and transmission to cool down before starting
work on the transmission.
- Disconnect negative (-) cable from battery.
CAUTION-
Prior to disconnecting the battery, read the battery discon-
nection cautions given in
001 General Cautions and
Warninas.
4 V-8 engine: Remove plastic engine cover.
Early models: pry out protective caps
(arrows), then re-
move nuts securing cover.
Lift off cover.
Later models: depress four studs to release, then lift off
cover.

Downloaded from www.Manualslib.com manuals search engine
Automatic ~ransmissionl
II I
4 Install engine support across engine bay. Raise and safely
support vehicle.
Make sure the car is stable and
we1 supported at all times.
Use a professional automotive lift
orjaclc stands designed for
CAUTIOI\C
Removal of transmission will cause engine to tip unless en-
gine support is used.
- Remove splash shields from underside of vehicle.
- &cylinder models: Detach front stabilizer bar from stabilizer
bar
links. Swivel stabilizer bar upward.
- Drain ATF from transmission as described earlier.
- Remove exhaust system and exhaust heat shield. See 180
Exhaust System.
- Disconnect driveshaft from transmission and hang to one
side. See
260 Driveshaft.
4 With selector lever in park:
Hold
linkage clamping bolt (A) stationary when loosening
selector lever cable clamping nut
(6).
- Loosen cable clamping nut and remove cable from bracket
(ASS
3252 transmission shown).
- Where applicable, disconnect vehicle speed sensor harness
connector.
4 Disconnect main electrical harness connector(s) from trans-
mission by turning bayonet lock
ring(s) (arrows) counter-
clocltwise.
A4S
310R transmission: Harness connector at right rear of
transmission.
ASS
360R / ASS 390R transmission: Harness connector
(arrow) at right rear of transmission.
ASS 3252 transmission: Two connectors (arrows) on left
side of transmission.
ASS 5602 transmission: Harness connector at right rear of
transmission.
- ASS 4402 transmission: Harness connector at top left rear
of transmission.
- Remove wiring harness from transmission housing

Downloaded from www.Manualslib.com manuals search engine
Automatic Transmission
4 Remove transmission cooler line clamp mounting nut (ar-
row) from transmission bell housing. Disconnect cooler lines
from transmission.
- Disconnect both transmission cooler fluid lines from trans-
mission.
CAUTION-
Place a pan under transmission fluid lines to catch dripping
fluid.
4 Remove access plug in cover plate below engine oil pan
(V-8 models) or left side of bellhousing (6-cylinder models).
Remove torque converter bolts. Turn
cranltshaft to access
bolts.
V-8 models: Place BMW special tool 23 3 030 between
engine oil pan and front
subframe (arrows).
- 6-cylinder models: Place BMW special tool 11 7 370
between engine oil pan and front subframe.
- Support transmission with transmission jack.
4 Remove transmission crossmember bolts A, B and C and re-
move transmission support crossmember
(V-8 model shown,
6-cylinder models are similar).
- Remove bellhousing-to-engine mounting bolts.
- Use appropriate selection of BMW special tools 24 4 130 to
hold torque converter in place during transmission removal.
CAUTION-
Do not allow the torque converter to fall off the transmission
input shaft
- Remove transmlsslon by pull~ng back and down. Lower jack
to allow transmiss~on to clear vehicle.
rrs corn-hi8 Rniiti Riranrd

Downloaded from www.Manualslib.com manuals search engine
240-1 3
Automatic ~ransmissionl
- Blow out oil cooler lines with low-pressure compressed air
and flush cooler with clean ATF twice before reattaching lines
to transmission.
CA UTIOG
Wear safety glasses when worling with compressed air:
@ Do not reuse ATF used for flushing.
- Remainder of installation is reverse of removal, noting the fol-
lowing:
Reinstall driveshafl using new nuts.
Install new sealing washers on transmission cooling line
banjo bolts.
Install new O-rings on transmission cooler lines, where
applicable.
Inspect engine drive plate (flywheel) for cracks or elongat-
ed holes. Replace
if necessary.
Be sure bellhousing alignment dowel sleeves are located
correctly. Replace damaged sleeves.
Checlc to be sure torque converter is seated correctly in
transmission during final installation.
Use
BMW special tool 24 2 300 to align three mounting
tabs on torque converter with indentations on drive plate
(flywheel).
Fill transmission with clean ATF until oil level is even with
fill hole. Then check fluid level as described earlier.
Adjust gearshift mechanism. See
250 Gearshift Linkage.
NOTE-
In order to avoid difficulties in transmission removal at a fu-
ture time, use washers with Torx-head mounting bolts.

Downloaded from www.Manualslib.com manuals search engine
250-2
I Gearshift Linkage
This repair group covers transmission gearshift and linkage service for both manual and automatic transmission
equipped vehicles.
To gain access to the complete gearshift mechanism it is
necessary to remove the exhaust system and the driveshaft
as described in
180 Exhaust System and 260 Driveshaft.
NOTE-
In models with automatic transmission, the electronic immo-
bilizer
(EWS) prevents starter operation unless the gear po-
sition is Park or Neutral.
Special tools
BMW suggests the use of one special tool in the removal
of the gear shift lever for manual transmission equipped
I I vehicles.
Manual transmission
gearshift linkage
--
4 Gearshift linkage
1. Inner rubber boot
2. Shift lever mounting ring
3. Bushing
4. Shift console
5. Shift lever
6. Selector rod
7. Spacer ring
8. Circlip
9. Dowel pin
10. Locking ring
11. Washer
12. Gear selector rod coupling
13. Locking pin
14. Bushing
4 Sh~fter spanner
(Tool No. BMW
25 1 11 0)
MANUAL TRANSMISSION GEARSHIFT

Downloaded from www.Manualslib.com manuals search engine
Driveshaft
4 Driveshaft center slide nut spanner
(Tool No. BMW
26 1 040)
7, 25 1 Ho 4 cv joint removal tool
(Tool No. BMW 26 1 11 0)
support assembly
Driveshaft description
4 The two-piece driveshaft is connected to the transmission by
a rubber flex-disc and to the rear final drive by a constant ve-
locity (CV) joint.
A universal joint is used at the center of the driveshaft and
the shaft is supported in the middle by a center support
bearing. The bearing is mounted in rubber to isolate vibra-
tion.
- The rear constant velocity joint compensates for fore and
aft movement of the drive line.
Troubleshooting
The source of driveline vibrations and noise can be difficultto pin-
point. Engine, transmission, rear axle, or wheel vibrations can be
transmitted through thedriveshaftto the car body. Noises from
thecar may be caused by final drive problems, or by faulty wheel
bearings, drive axles, or even
wom or improperly inflated tires.
NOTE-
For drive axle repair information, see 331 Final Drive
Driveshaft noise or vibration may be caused by worn
ordam-
aged components. Check the universal joint for play. With the
driveshaft installed, pull and twist the driveshaft while watch-
ing the joint. The
BMW specification for play is very small, so
almost any noticeable play could indicate a problem.
Check the torque of the fasteners at the flange connections.
Check the rubber of the flex-disc and center bearing for dete-
rioration or tearing. Check the driveshaft for broken or miss-
ing balance weights. The weights are welded tabs on the
driveshaft tubes. In addition to inspecting for faulty driveshaft
parts, the installed angles of the driveshaft should also be
considered.

Downloaded from www.Manualslib.com manuals search engine
1 Driveshaft
Further inspection requires removal of the driveshaft. Checlc
the front centering guide on the transmission output flange for
damage or
misalignment. Also check runout at the transmis-
sion output fiange and output shaft, and at the final drive input
fiange. Check the bolt hole bores in the flange for wear and
elongation.
Driveshaft flange
runout (max. allowable)
Transmission
flange
- Axial play 0.10 mm (0.004 in.)
Radial play 0.07
mm (0.003 in.)
Spin the driveshaft center bearing and
check ior smooth op-
eration without play. Check the constant velocity joint
forwear
or play. Checlc the universal joint for wear or binding. If it is
difficult to move or binds, the driveshaft section should be
replaced.
Universal joint
play
Maximum allowable 0.15
mm (0.006 in.)
NOTE-
With the driveshaft installed, the actual amount that the drive-
shaftjoint pivots is limited. For the most accurate test, check
joint
in its normal range of movement.
If inspection reveals nothing wrong with the driveshaft, it may
need to be rebalanced. This can be done by a speciality drive-
shaft repair shop. Also,
checlc driveshaft alignment as de-
scribed below.
NOTE-
Minor driveshaft vibrations can often be corrected simply by
disconnecting the driveshaft at the final drive and reposition-
ing it go", 180" or 270" in relation to the final drive input
flange.
The troubleshooting table below lists symptoms
oi driveshaft
problems and their probable causes. Most of the repair infor-
mation is contained within this repair group. There are refer-
ences to other repair groups, where applicable.

Downloaded from www.Manualslib.com manuals search engine
4 Remove nuts (arrows) from constant velocity joint mounting
bolts at final drive. Pry constant velocity joint free from final
drive input flange at groove
(A).
- Hang driveshaft rear section from body using stiff wire.
< Do not let driveshaft hang unsupported, as rear CV joint rub-
ber boot (arrow) may be damaged.
4 Remove center support bearing mounting nuts (arrows)
- Remove driveshaft. Pull down on center of driveshaft to
facilitate removal.
CAUTIOI\C
Protect CVjoint with plastic cover.