Suspension specifications (Opel Omega A)

For later model years, see the Appendix at the end of the Manual (Section 13).

Front suspension

Type - Independent MacPherson struts, coil springs and anti-roll bar, double-acting telescopic shock absorbers.

Rear suspension

Type - Independent, semi-trailing arms and coil springs, anti-roll bar, dual-action telescopic shock absorbers, telescopic leveling system on some models.

Rear shock absorber piston air pressure (where it is equipped):

• Unloaded - 0.8 Vag
• Loaded - 3.0 Wag

Rear Wheel Installation (Laden*)

Collapse:

• Sedan - from -2°20' to -1°
• Station wagon - from -2°5' to -0°45'

Maximum deviation of left and right wheel - 0°25'

Wheel alignment/toe-in adjustment:

• Sedan - 0°5' toe-in to 0°45' toe-in (from 0.5 to 5.0 mm)
• Station wagon - 0° - 0°50' toe-in (from 0 to 6.0 mm)

Maximum deviation of left and right wheel - 0°25'

Note: *Laden means the vehicle has two people in the front seats and the fuel tank is half full.

Wheels

Type - Pressed steel or light alloy

Size - 5 ½ J x 14

Tires

Sedan — 185/70 R 14-88N

Station wagon:

• With manual transmission - 185/70 R 14 - 88N
• With automatic transmission — 175 R 14 - 88T or 185/70 R 14 - 88T

Tire pressure (cold), Bar

Up to three passengers:

• Sedan - Front 2.2; Rear 2.2
• Estate - Front 2.0; Rear 2.2

Maximum load:

• Sedan - Front 2.5; Rear 2.9
• Estate - Front 2.6; Rear 3.2

Tightening torques, Nm

Front suspension

Lower control arm pivot bolt*:



Front:

• Stage 1 - 70
• Stage 2 - Adjust 45°-60°

Rear:

• Stage 1 - 120
• Stage 2 - Adjust 30°-45°

Front anti-roll bar installation - 40

Steering knuckle support*:

• Stage 1 - 50
• Stage 2 - 100
• Stage 3 - Tighten 30°-45°

Hub Nut - 320

Upper rack mount - 70

Transverse stabilizer bar - 65

Front crossmember - 170

Lower ball joint to joint - 100

Lower ball joint to arm - 35

Note:* Refers to special bolts that must be replaced after removal.

Rear suspension

Crossbar - 125

Drive shaft to rear hub:

• Stage 1 - 150
• Stage 2 - Turn 45°- 60° further

Twist Arm Pivot Bolt - 100

Transverse stability stabilizer bar - 22

Lower shock absorber rod mount - 110

Upper shock absorber rod installation - 20

Rear hub nut - 300

Wheels

Wheel bolts - 90