Suspension and steering specifications (Opel Omega B)

Front suspension
Type	Independent suspension with MacPherson struts, screw springs, anti-roll bar and telescopic shock absorbers. With adjustable wheel alignment
Rear suspension
Type	Independent, using suspension arms, coil springs springs, anti-roll bar and telescopic shock absorbers. With adjustable wheel alignment
Steering
Type	Worm gear steering with adjustable steering length traction. Power steering system is installed on all models. Speed sensitive power steering system vehicle movement, installed on models with a 6-cylinder engine
Steering gear ratio	14,8:1
Amount of grease	1.3 l
Hydraulic pressure:
- the wheels are turned all the way	100 – 110 Bar
- the wheels are straight	2 Bar

Front suspension

Springs	Color coding	Length of springs	Compression ratio
Models before 1998 with 4-cylinder engine SOHC	Blue/Brown	368 mm	21 N/mm
Models from 1998 with 4-cylinder engine DOHC and air conditioning	Blue/Orange	390 mm	21 N/mm
Models before 1998 with 6-cylinder engine, without air conditioning	Yellow/ Purple	362 mm	24 N/mm
Models from 1998 with 6-cylinder engine, with air conditioning	Brown/ Brown	373 mm	24 N/mm

Front wheel alignment*

Wheel alignment:
- models with a sedan body type	-1°20'45'
– models with a station wagon body type	-1°40'45'
– maximum deviation between wheels	1°
Angle of longitudinal inclination of kingpin:
- models with a sedan body type	-5°40'1°
– models with a station wagon body type	-5°1°
– maximum deviation between wheels	1°
Wheel alignment:
- models with a sedan body type	-0°10'10'
– models with a station wagon body type	-0°10'10'
– deviation between the wheels when the inner wheel rotated 20°	1°40'45'

* When taking measurements, the tires must be fully inflated and the vehicle must be loaded, i.e. there must be a load of 70 kg on each seat and the fuel tank must be completely full.

Rear wheel adjustment*

Wheel alignment:
- models with a sedan body type	-1°50'40'
– models with a station wagon body type	-1°40'40'
– maximum deviation between wheels	45'
Wheel alignment:
- models with a sedan body type	-0°20'10'
– models with a station wagon body type	-0°20'10'
Wheel offset	25'

* When taking measurements, the tires must be fully inflated and the vehicle must be loaded, i.e. there must be a load of 70 kg on each seat and the fuel tank must be completely full.

Wheel rims

Type	Steel or aluminum alloy
Size	6 1/2 Jx15, 7Jx15 or 7Jx16, depending on model

Tires

Size:
– models with a Sedan and Station Wagon body type with 4-cylinder engines	195/65 R 15, 205/65 R 15 or 225/55 R 16
– models with a Sedan and Station Wagon body type with 6-cylinder engines engines	205/65 R 15 or 225/55 R 16

Tightening torques, Nm

Front suspension
Anti-roll bar bracket bolts:
- stage 1	20
- stage 2	Turn 30° further
- stage 3	Turn 15° further
Fastening the connecting links to the anti-roll bar sustainability	65
Fastening the connecting links of the anti-roll bar resistance to suspension struts	65
Front suspension cross member*:
– front mounting bolts:
• stage 1	65
• stage 2	Turn 30° further
• stage 3	Turn 15° further
– central mounting bolts:
• stage 1	150
• stage 2	Turn 30° further
• stage 3	Turn 15° further
– rear mounting bolts:
• stage 1	130
• stage 2	Turn 30° further
• stage 3	Turn 15° further
Hub mounting nut*	320
Fastening the lower ball joint to the suspension arm	35
Fastening the lower ball joint to the steering knuckle	100
Lower control arm pivot bolts:*
- front bolt:
• stage 1	120
• stage 2	Turn 30° further
• stage 3	Turn 15° further
– rear bolt:
• stage 1	120
• stage 2	Turn 30° further
• stage 3	Turn 15° further
Shock absorber piston rod mounting nut	70
Suspension strut mounting nuts	55
Fastening the rack to the steering knuckle:*
- stage 1	90
- stage 2	Turn 45° further
- stage 3	Turn 15° further
Rear suspension
Fastening the connecting links of the anti-roll bar resistance to suspension arms	20
Fastening the anti-roll bar to the crossmember rear suspension	22
Fastening the damper blocks to the body	65
Fastening the damper blocks to the suspension cross member:
- stage 1	90
- stage 2	Turn 30° further
- stage 3	Turn 15° further
Nuts securing the axle shaft to the rear wheel hub:
- stage 1	50
- stage 2	Turn 60° further
- stage 3	Turn 15° further
Rear wheel hub mounting nut*	300
Pivot bolt of the suspension arm	100
Lower shock absorber mount	110
Upper shock absorber mount	20
Fastening the rear suspension crossmember to the body	65
Fastening the crossmember to the differential damper bushing	125
Fastening the suspension arm to the transverse rod	45
Fastening the suspension arm to the crossmember*	90
Steering
Fastening the airbag module to the steering wheel wheel	8
Central tie rod mount to steering arm	60
Fastening the central steering rod to the steering arm	60
Steering arm mount	160
Fuel line connection nuts	28
Steering knuckle mount	60
Outer Tie Rod Tie Bolt	15
Fastening the outer tie rods to the central tie rod	60
Power steering pump mounting:
– models with 4-cylinder engine	25
– models with 6-cylinder engine	20
Power steering system hydraulic tube connections management	28
Fastening the pulley of the power steering pump	20
Steering column mount	22
Steering column mounting bracket	22
Steering gear tie rod bolt	22
Fastening of protective screens of the steering gear	15
Steering gear mount	55
Power Steering Pump Mounting Brackets management	20
Steering column shaft mount	22
Steering wheel	20
Steering tie rod ball joint fastening nut*	60
Wheels
Wheel mounting bolts	110

* Use a new nut/bolt.