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E38 (1994-2001) E32 (1986-1994)
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  • BMW 7 Series
  • E38
  • Chassis
  • Front suspension
  • Suspension and steering specifications

Suspension and steering specifications (BMW 7 Series E38)

            0

Maximum axial runout of the wheel hub on the hub bearing flange, mm 0.03
Clearance of 2-row wheel hub bearing, mm no more than 0.06÷0.08
Maximum/minimum pressure in the ride height adjustment valve circuit, atm 120±5 // 30±3
Operating pressure of the hydraulic accumulator for suspension adjustment, atm 23±0.5


Front suspension

Track width of front wheels under normal load, mm
  • With a pressing depth of 20 mm
1552
  • With a pressing depth of 23 mm
1546
Front axle ground clearance height under normal load (from the lower edge of the wheel rim to the lower edge of the wheel arch, through the center of the wheel), mm
  • The difference in deviation from the set value between all wheels
no more than 10
  • Serial suspension (rim 16" // 17" // 18")
613 // 628 // 641 (± 10)
  • Sports suspension (rim 16" // 17" // 18")
593 // 608 // 621
  • Equipment for bad roads (rim 16" // 17" // 18")
635 // 650 // 663
Overall wheel alignment 0°14'±10'
Wheel alignment (difference between left and right no more than 40')
  • Standard equipment
-13'±30'
  • Equipment for bad roads
-18'±30'
  • Sports suspension
-36'±30'
The angle between the turning radii of the inner and outer wheels when turning the inner wheel at an angle of 20° (the difference between left and right is no more than 30')
  • Standard equipment
-1°35'±30'
  • Equipment for bad roads
-1°24'±30'
  • Sports suspension
-1°45'±30'
The longitudinal tilt angle of the steering axis (the difference between left and right is no more than 30') when turning the wheels by±10° //±20°
  • Standard equipment
5°58'±30' // 6°06'±30'
  • Equipment for bad roads
5°46'±30' // 5°54'±30'
  • Sports suspension
6°12'±30' // 6°20'±30'
Front wheel misalignment 0°±15'
Maximum turning angle of the inner/outer wheel 43° // 33°
Turning diameter, m 11.6


Rear suspension

Track width of rear wheels under normal load, mm
  • With a pressing depth of 20 mm
1568
  • With a pressing depth of 23 mm
1562
Front axle ground clearance height under normal load (from the lower edge of the wheel rim to the lower edge of the wheel arch, through the center of the wheel), mm
The difference in deviation from the set value between all wheels no more than 10
Standard, sports and off-road suspension
(with adjustable ground clearance) (rim 16" // 17" // 18") 569 // 584 // 597 (± 10)
Equipment for bad roads (without ground clearance adjustment)
(rim 16" // 17" // 18") 589 // 604 // 617
Overall wheel alignment 0°18'±10'
Wheel alignment (difference between left and right no more than 15')
Standard and sports equipment
  • Measurement
-1'30°±20'
  • Adjustment
-1'27°±5'
Equipment for bad roads
  • Measurement
-1'07°±20'
  • Adjustment
-1'04°±5'
Geometric axis of the trajectory of motion 0°±12'


Steering

Steering gear ratio 14.5
Operating pressure of power steering pump, atm 120÷140
Working pressure of piston pump, atm 200


Tightening force of threaded connections, Nm

Wheel mounting bolts 100
Ground clearance sensor to bracket 5
Ground clearance sensor lever mount 8
EDC Pressure Pipeline Connections (M10 // M12) 14 // 20
Front suspension
Front suspension beam to front side member

M10x9.8

47

M10x8.8

42

M12x8.8

77

M12x12.9

105

M12x10.9

110
Screw (18 // 21 mm) suspension strut mounts/rough road adapter to wheel well/rough road adapter 24 // 34
Strut Cylinder Rod to Upper Strut Mount 64
Wishbone to front suspension beam 77.5
Transverse suspension arm to steering knuckle 93
Suspension arm to steering link/steering knuckle brace 93
Suspension arm brace to front axle connecting pipe/beam 127
Retaining bracket of anti-roll bar to front suspension beam/to body 22
Stabilizer bar mount to stabilizer/shock absorber strut 65
Rear suspension
Shock absorber to trailing arm/wheel bearing support/swing arm/transverse arm 127
Strut Cylinder Rod to Upper Strut Mount 23
Upper support of suspension strut to body/rear axle beam 24
Rear axle beam with rubber-metal hinge to the body 127
Trailing arm suspension to rear axle beam 72
Guide lever to the hub bearing support 60
Upper wishbone to wheel bearing support 160
Upper wishbone to rear axle beam 110
Additional arm to the trailing arm and rear axle beam 127
Swing arm to rear axle beam (front // back) 60 // 130
Integral arm to front wheel bearing support 105
Threaded connection of rocker arm, integral arm, hub bearing support 236
Stabilizer bar to stabilizer/swing arm mount stand 42
Steering, airbag
Tie Rod End to Steering Knuckle/Steering Bearing 65
Tie Rod Clamp Bolt 27
Steering knuckle to steering gear 61
Swing arm to front axle beam (M10 // M12) 42 // 85
Steering gear to the front axle beam (M10x8.8 // M10x10.9) 62
Power steering pump fastener 22
Power steering pump support to the front side member 22
Hollow bolts (M10 // M14 // M16 // M18) power steering line connections 12 // 35 // 40 // 45
Hydraulic line fittings of the power steering to the receiver regulator 40
Universal joint with crosspiece/elastic coupling to steering gear/steering shaft 19
Bracket for mounting the steering column adjustment mechanism to the instrument panel bracket and pedal support bracket 22
Hexagon head bolt to steering column adjustment mechanism mounting bracket 3
Steering shaft mounting bracket pipe clamp/clamp 22
Steering column to airbag bracket 18
Steering column to lever 14
Airbag unit to steering wheel 8
Bolt // nut securing the steering wheel to the steering column 63 // 80

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Article verified: Polikarpov Saveliy

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БМВ E38: Front suspension
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General information, recommendations and safety measures
Removal and installation the suspension assembly
Removal and installation the suspension beam
Removal and installation the left or right wishbone
Removal and installation of control arm stretchers and stretcher…


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BMW E38 (1994-2001) 
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BMW E32 (1986-1994) 
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