7 Series E38 L7 (M73) SAL
31 90 ...
Troubleshooting on the front axle
Condition
Cause
Remedy
Grinding noise (louder when
negotiating bends)
Wheel bearings faulty
Vibration
Vibration
a)
Wheels imbalanced
b)
Rims have lateral/radial runout
c)
Tires have radial runout
a)
Balance wheels
b)
Replace rims if necessary
c)
Match or replace tires
Steering-wheel shake
a)
Wheels imbalanced
b)
Rims have lateral/radial runout
c)
Shock-absorber effect
insufficient
d)
Pressure rod bearing defective
e)
Excessive backlash on steering
gear
a)
Balance wheels
b)
Replace rims if necessary
c)
Replacing shock absorber, refer
to 31 31 031
d)
Replacing traction strut mount,
refer to 31 12 148
e)
Determine pressure point and
replace steering gear
Rattling noise
a)
Shock absorber in steering
knuckle loose
b)
Ball joints of control arms worn
c)
Ball joint of traction strut worn
d)
Stabilizer rubber mounts worn
e)
Ball joints of push rod worn
f)
Front axle support screw
connection with body loose
a)
Check mount and tighten screw
b)
Replacing control arm, refer to
31 12 001
c)
Replacing traction strut, refer to
31 12 090
d)
Replace rubber mounts
e)
Replace push rod
f)
Tighten bolts (check threads)
Nervous cornering (skidding) due to
poor track holding
Shock-absorber effect insufficient
Replacing shock absorber, refer to
31 31 031
Prolonged body shake when driving
across uneven surface.
Shock-absorber effect insufficient
Replacing shock absorber, refer to
31 31 031
Rocking of body when driving over
successive rough road surfaces
Shock-absorber effect insufficient
Replacing shock absorber, refer to
31 31 031
Body bucks when accelerating
Shock-absorber effect insufficient
Replacing shock absorber, refer to
31 31 031
Wheels jumping even on normal
road surfaces
Shock-absorber effect insufficient
Replacing shock absorber, refer to
31 31 031
Vehicle loses back end when
braking
Shock-absorber effect insufficient
Replacing shock absorber, refer to
31 31 031
RA Troubleshooting on the front axle
BMW AG - TIS
22.02.2013 01:29
Issue status (12/2007) Valid only until next DVD is issued
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