engine BMW 525i 1998 E39 Workshop Manual

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Gearshift ~inkaael
Gearshift lever, removing
(manual transmission)
Use the accompanying illustration as a guide when removing
and installing the gearshift linkage.
- Remove shift knob by pulling knob straight off shift lever.
NOTE-
Pull up on the shift knob with about 90 lbs. of force. Do not
twist
knob or locating key can be damaged.
- Squeeze sides of shift boot to unclip from center console.
Pull boot up and off shift lever.
- Remove sound insulation at base of shift lever.
- Raise vehicle to gain access to underside of vehicle.
- --
WARNING-
Male sure the car is stable and well supported at all tfmes.
Use a professional automotwe hft orjaclc stands designed for
the purpose.
A floorjaclc 1s not adequate support.
- Remove complete exhaust system. See 180 Exhaust
System.
- Remove driveshaft. See 260 Driveshaft.
- Support transmission with transmission jack. Remove
crossmember from rear of transmission.
- Lower rear of transmission to access gearshift linkage.
CA UTIOI\C
Tilting the engine to lower the transmission can lead to
damage to various components due to lack of clearance.
4 Working above transmission, disconnect selector rod:
* Pull off shift rod retaining circlip (A).
Remove washer (6).
Disengage selector rod (C) from gearshift lever.

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250-4
I Gearshift Linkage
Release gearshift lever mounting ring from below using BMW
special spanner 25 1 110. Turn tool 90' ('I, turn)
counterclockwise.
Push shift lever up to remove from shift console,
Raise transmission and temporarily install transmission
crossmember.
Lower vehicle. Working from inside passenger compart-
ment, pull up on shift lever to remove it together with inner
rubber boot and shift lever mounting ring.
Gearshift lever, installing
(manual transmission)
- Clean old grease from shift lever ball and mounting ring.
Also clean shift console bowl. Lubricate with molybdenum
disulfide grease.
- Insert shift lever together with inner boot and mounting ring
into center console.
4 Align shift lever mounting ring locking tabs with slots
(arrows) in shift console bowl. Press down until ring
snaps into place.
NOTE-
lnstall mounting ring witli arrow pointing toward front of car.
4 Pull inner rubber boot over shift console bowl (arrows) to
seal base of shift lever.
NOTE-
lnstall rubber boot witli arrow pointing toward front of car.
- Raise car and support transmission. Remove transmission
crossmember and lower transmission to access base of shift
lever.
CAUTIOI\C
Tilting the engine to lower the transmission can lead to
damage to various components due to lack of clearance.

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Gearshift Linkage
- Connect selector rod to shift lever. Lift transmission, install
crossmember and tighten crossmember bolts.
Install driveshaft and heat shield. See
260 Driveshaft.
Reinstall exhaust system. See 180 Exhaust System.
. Lower vehicle. Install shift boot. Push shift ltnob on lever.
Tightening torque
Driveshaft
CV joint to final drive flange
. MI0 (Tom bolt)
70 Nm (51 ft-lb)
. M8 (compression nut) 32 Nm (24 ft-lb) - Driveshaft clamping sleeve
- MI0 ribbed nuts
80 Nm (59 ft-lb)
MI0 compressed nuts 64 Nm (47 ft-lb)
Flex-disc to driveshaft or transmission flange
MlO (8.8 grade) 48
Nm (35 ft-lb)
. MI0 (10.9 grade) 60
Nm (44 ft-lb)
- MI2 (10.9 grade) 100 Nm (74 ft-ib)
MI4 140 Nm (103 fi-lb)
Transmission crossmember
. to transmission 21 Nm (15 ft-lb)
. to chassis 42 Nm (30 ft-lb)

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pearshift Linkage
~UTOMATIC TRANSMISSION
GEARSHIFT
Automatic transmission gearshift mechanism
automatic
5-speed Steptronic (5251,530i)
1. Shift lock solenoid
2. Shifter assembly
3. Shift cable
4. Support bracket
5. Selector lever
Gearshift mechanism, adjusting
(automatic transmission)
- Position gearshift lever in Park.
- Raise vehicle to gain access to shift linkage.
WARNING -
Make sure the car is stable and well supported at all times.
Use a professional automotive
lift orjack stands designed for
the purpose.
4 Counterhold bushino A and loosen cable clam~ino nut 6.
Push cable end backward away from engine (arrow 2).
Release pressure on cable.
Tighten clamping nut.
/ CAUTION--
Tightening torque
Shift cable clamping nut
10 Nm (7.5 it-lb)

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250-7
Gearshift ~inka~el
Automatic shiftlock, checking function (automatic transmission)
The automatic shiftlock uses an electric solenoid to lock the
selector lever in Park or Neutral. Depressing the foot bralte
with the ignition on energizes the solenoid, allowing the lever
to be moved into a drive gear. The solenoid is energized only
when the engine speed is below 2,500 rpm and the vehicle
speed is below
3 mph (5 kph). The solenoid is mounted in the
right side of the selector lever housing.
... nir r
Shiftlock
4 Automatic shiftlock prevents drive gear selection until brake
pedal is depressed.
With engine running and car stopped, place selector lever
in Park or Neutral.
Without depressing bralte pedal, check that selector lever
is
loclted in position (Parlt or Neutral).
Depress brake pedal firmly. Solenoid should click audibly.
Check that selector lever can now be moved out of
Parlt or
Neutral.
parking
brake on and with extreme caution.
solenoid
0012713
With selector
lever in Park or Neutral and bralte pedal de-
pressed, raise engine above 2,500
rpm. Check that selec-
tor lever cannot be moved out of Park or Neutral.
If any faults are found check the electrical operation of the
shiftloclt solenoid and checlt for wiring faults to or from the
transmission control module (TCM). See
610 Electrical
Component Locations and ELE Electrical Wiring
Dia-
grams.
NOTE-
NOTE-
The solenoidis controlled via the TCM, using brake pedalpo-
sition, engine speed, and road speed as controlling inputs.
The
next test should be performed in an open area with the

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250-8
Gearshift Linkage
-;Ag Gate "",?it.,
Shift interlock, checking function
(automatic transmission)
4 The shift interlock uses a cable between the ignition switch
and the shift lever to lock the shift lever in the park position
when the key is in the off position or removed. This feature
also prevents the key
from being removed from the ignition
lock until the selector lever is in Park.
Shift selector lever to Park position and turn ignition key to
the off position.
Remove ignition key. Checlc that selector lever cannot be
shifted out of Park position.
Turn ignition lkey on and depress
brake pedal. Checlc that
selector lever moves freely from gear to gear.
With selector lever in a gear position other than Park, at-
tempt to turn lkey to off position and remove. Key should not
go into off position.
If any faults are found check cable for lkinks and
check
cable attachment points for damage or faults.
NOTE-
* It must only be possible to remove ignition ley with
selector lever
in Park position.
* Do not link shift interlocl( cable.
Shift interlock repair is covered
in 320 Steering and
Wheel Alignment.

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................. General ............................ 260-2 Driveshaft. installing 260-10
.................. Special tools ........................ .26 0.2 Flex.disc. replacing 260-1 1
..... Driveshaft description ................. .26 0.3 Center bearing assembly. replacing 260-12
........ Troubleshooting ..................... .26 0.3 Front centering guide. replacing 260-13
Constant velocity
(CV) joint. replacing .... 260-14 Driveshaft Service ................. .26 0.6
Driveshaft. aligning
................... .26 0.7
Driveshaft. removing
................. .26 0.8

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260-2
1 Driveshaft
This repair group covers repair and replacement of the
driveshaft and driveshaft components.
Driveshaft repairs consist of replacement of front flex-disc.
center mount or rear
CV joint. If the driveshaft joint is defec-
tive, replace the complete driveshaft.
Drive axle repairs are covered in
331 Final Drive
Special tools
BMW suggests the use of certain special tools in removing,
installing or servicing the driveshaft or its components.
4 Transmission jack
(Tool No. BMW 00 2 030)
4 Transmission support (for use with transmission jack)
/ (Tool NO. BMW 23 0 040)
24 0 170
1
4 Transmission support (for use with transmission jack,
A5S 560Z transmission)
(Tool No. BMW 24
0 170)
24 0 250
I
4 Transmission support (for use with transmission jack,
A5S
4402 transmission)
(Tool No. BMW 24
0 250)
4 Drlveshaft center mount allgnlng yg
Tool No. BMW 26 1 000)

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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.

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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.