Removing the rear suspension strut assembly
Remove the respective rear wheel.
Dismantle the wheel arch (body chapter).
Unscrew the bottom fixing bolt of an amortization rack.
Unscrew the four upper fixing bolts and remove the suspension strut.
When mounting, use new bolts.
Tightening torques: Suspension strut at the top on the wheel mounting side 55 Nm, Suspension strut on the trailing arm 150 Nm + 30°to 45°.
Dismantling the suspension strut
For this work, a spring tensioner is required. Without the use of a spring tensioner, it is impossible to loosen the fixing nut at the top of the shock absorber piston rod, because. the spring is under high preload. Parts of the suspension strut will explode as if in an explosion - risk of injury! In addition, the weakened spring is no longer installed. Spring tensioners are available from parts stores.
Dismantle the shock absorber.
Install the spring tensioner on the coils of the spring and compress the spring.
Unscrew the fixing nut at the top of the piston rod.
Remove the piston rod attachments. When assembling, tighten the nut to 20 Nm.
Removing the rear stabilizer
Put the car on jack stands and remove both rear wheels.
Unscrew at the ends of the stabilizer one fixing bolt on the trailing arm.
Unscrew both clamps on the cross member.
Tilt the stabilizer slightly and remove.
Mounting: tighten the fixing bolts and nuts to 55 Nm.
Removing the wheel bearing module
In Vectra models, so-called wheel bearing modules are mounted on the rear axle. They can be easily changed without special tools. The disadvantage of this design is that the combined part is of course more expensive than a single wheel bearing.
Raise the rear of the car.
Remove the corresponding wheel.
Release the handbrake - the Vectra must be perfectly secured against rolling.
Remove the brake drum.
On vehicles with brake discs at the rear, remove the brake caliper and hang it with the brake hose screwed on so that the hose does not kink.
Remove the brake disc.
Unlock and disconnect the wire connectors on the ABS speed sensor.
On the inside of the wheel bearing module, unscrew the four fixing nuts.
Remove the wheel bearing module from the trailing arm.
Screw on the wheel bearing module with new nuts.
Tightening torque 50 Nm + 30°to 45°.
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