BMW 3 (E46). Manual — part 155
When reassembling, grease tie rod taper
so that rack boot support buffer or small
end of rack boot (inset) slides on tie rod
when tie rod is tightened, preventing
rack boot from twisting.
-
Installation is reverse of removal,
noting the following:
Make sure all threaded parts are
clean. Replace self-locking nuts.
Install outer tie rod end to new tie
rod using reference measurement
(A) recorded earlier.
Have car professionally aligned.
Tightening torques
Outer tie rod end to
steering arm
65 Nm (48 ft-lb)
Outer tie rod end
lock nut
45 Nm (33 ft-lb)
Inner tie rod to
steering rack
100 + 10 Nm
(74 + 7 ft-lb)
320-5
Wheel Alignment
Proper handling, stability, tire wear and
driving ease depend upon the correct
alignment of all four wheels. The front
axle is aligned in relation to the rear
axle, then the front wheels are aligned
in relation to one another. This is
known as a four-wheel or thrust-axis
alignment.
The BMW E46 uses a sophisticated
multi-link suspension at the front and
rear of the car. Proper alignment
requires computerized alignment
equipment.
Alignment specifications only apply
under the following conditions:
Correct wheels and tires are
installed, in good condition, and
are at the correct inflation
pressures.
All steering and suspension parts
and bushings are undamaged and
show no signs of abnormal wear.
Wheel bearings are in good
condition.
Ride height is in accordance with
specifications. See
300
Suspension, Steering and Brakes-
General
Car is in normal loaded position.
See
Table a. Front wheel alignment
specifications
for front wheel alignment
specifications,
Table b. Rear wheel
alignment specifications
for rear wheel
alignment specifications.
WARNING!
While performing alignment
procedures, make sure the car is
stable and well supported at all
times. Use a professional automotive
lift or jack stands designed for the
purpose. A floor jack is not adequate
support.
Normal loaded position
Each front seat
68 Kg (150 lb)
Rear seat (center)
68 Kg (150 lb)
Trunk
21 Kg (46 lb)
Fuel tank
full
Table a. Front wheel alignment specifications
Parameter
Standard
suspension
All wheel
drive
suspension
Sport
suspension
Rough road
suspension
Toe angle (total)
0° 14' ± 8'
Camber (difference between
left/right max. 30')
track differential angle with
20° lock on inside wheel
-20' ± 20'
-1° 34' ± 30'
20' ± 20'
-53' ± 30'
43' ± 20'
-1° 34' ± 30'
+8' ± 20'
-1° 34' ± 30'
Caster (difference between
left/right max. 30')
with 10 wheel lock
with 20 wheel lock
5° 26' ± 30'
5° 37' ± 30'
5° 27' ± 30'
5° 37' ± 30'
5° 36' ± 30'
5° 47' ± 30'
5° 17' ± 30'
5° 27' ± 30'
Front wheel displacement
0° ± 15'
Table b. Rear wheel alignment specifications
Parameter
Standard
suspension
All wheel
drive
suspension
Sport
suspension
Rough road
suspension
Toe angle (total)
0° 16' ± 6'
Parameter
Standard
suspension
All wheel
drive
suspension
Sport
suspension
Rough road
suspension
Camber (difference between
left/right max. 15')
maximum allowable
deviation between sides
-1° 30' ± 15'
-1° 15' ± 15'
-2° 04' ± 15'
-46' ± 15'
Geometrical axis deviation
0° ± 6'
Front wheel camber
Any change to the camber will also
change the toe setting. Always adjust
camber prior to adjusting toe.
Front wheel camber adjustment can be
made by driving out factory strut
alignment pin (A) in upper strut housing.
-
Loosen upper strut mount nuts (B).
-
Use BMW special tool 32 3 140 to
adjust position of upper strut mount
studs in slotted holes (arrows).
Tightening torque
Upper strut mount
to body
24 Nm (17 ft-lb)
Front wheel toe
Front wheel toe is adjusted at tie rod
ends:
Loosen tie rod lock nut (A).
Adjust tie rod by turning inner tie
rod (B) to change length.
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