AUDI A4 1999 B5 / 1.G Suspension Wheel Alignment Owner's Guide

44-32

Bring vehicles with heavy duty suspension
1BB (vehicle ride height 20 mm higher) into
defined starting position B1 page 44
-28


Note:
Depending on the type of wheel alignment
equipment used, it may be necessary to raise the
front of the vehicle in order to position the
VAG1925 spacer. After lowering the vehicle
again the suspension must be bounced.

- Insert VAG1925 spacer together with VAG1925/4 adapters and screw
both threaded spindles out...

Make sure vehicle is not raised using the above procedure - ...until they just rest against front subframe bolts (arrow).
Vehicle with heavy duty suspension 1BB is now in defined starting
position B1
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44-33

Notes:
For all suspension versions (1BA, 1BC, 1BE,
1BP and 1BB):

The defined starting position B1 is the position
the springs must be in when using the wheel
alignment program to check the actual toe-in
setting C1 for each wheel ( page 44
-27
).
Setting C1 should match the specification + 10`
30` (rough pre-adjustment). If necessary, the
toe-in must be corrected by adjusting the tie rod
length.

Wheel alignment specifications page 44
-
11
.

If the settings need to be corrected, this will be
indicated by the wheel alignment program.

CAUTION!
Make sure that the wheels do not loose
contact with the turntables during the lifting
operation.
If wheels do loose contact, do not move the
turntables. Otherwise incorrect
measurements will result.
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44-34

Extending the springs (standard, sport and
heavy duty (1BP) suspensions

CAUTION!

Make sure that the wheels do not lose
contact with the turntables during the lifting
operation.
If wheels do lose contact, do not move the
turntables. Otherwise incorrect
measurements will result.

- Raise vehicle at front jacking points.

Vehicle is now in position B2 page 44
-27
- Lift cylinders out of threaded spindles and secure in position using
locking pins.
- Make sure locking pins (arrows) are correctly positioned.
- Lower vehicle down onto spacer gauge.
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44-35

Extending the springs (heavy duty
suspension (1BB)

CAUTION!

Make sure that the wheels do not lose
contact with the turntables during the lifting
operation.
If wheels do lose contact, do not move the
turntables. Otherwise incorrect
measurements will result.

- Raise vehicle at front jacking points.

Vehicle is now in position B2 page 44
-27
- Lift cylinders out of threaded spindles and secure in position using
locking pins.
- Make sure locking pins (arrows) are correctly positioned.
- Remove VAG1925/6 adapter.
- Lower vehicle down onto spacer gauge.
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44-36

Note:
The wheel alignment program determines the
current right and left toe constant (actual values
of C2 - C1 page 44
-27
). The program checks
whether the current toe constant (actual value)
lies within the tolerance (control value) vehicle
alignment specifications tables, pages 44
-11
and
Page 44
-13
.

- If toe constant actual value lies outside control value tolerance, adjust
toe value constant within adjusting value tolerance.

Front-wheel-drive vehicles page 44
-11

All-wheel-drive vehicles page 44
-13
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44-37

Adjusting toe constant "S"

Checking toe constant after adjusting
The alignment unit checks the toe constant again. - Loosen nut -A-.
- Back out bolt -B- approx. 4 mm (1/8 in.).
- Push tie rod end downward onto stop.
- Turn in adjusting bolt -B- until exact specifications are achieved.
- Tighten nut -A- to 45 Nm (33 ft lb) and check values.
- Tighten bolt -B- to 7 Nm (62 in. lb).
- Lower vehicle to defined starting position B1.
- Screw threaded spindle down.
- On vehicles with standard suspension, bounce suspension several
times.
If the second check shows that the values are within the check value
tolerance, the setting is OK. If the values are outside the check value tolerance, the setting must
be adjusted again in position B2. Position B2: + 60 mm (2.36 in.).
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44-38

Front axle toe-in, setting


- Loosen lock nut -B-.

Make sure that the boots are not twisted after turning the tie rods
Note:
Twisted boots will wear out quickly.
After tightening lock nut -B- it is possible that the toe value may deviate
slightly.
If the measured toe lies within the tolerances, the adjustment is correct. - Adjust toe on left and right at hex -A-.
- Tighten lock nut -B- and check toe-in again.
Tightening torque: 40 Nm (30 ft lb)
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