Eliminating steering vibrations (Opel Vectra A)

Increased vibration of the steering wheel in a certain speed range usually occurs due to wheel imbalance.

Basic checks

Check and adjust tire pressure if necessary.

Conduct a test drive, reducing the vibrations as much as possible (appropriate speed range, better roads, smooth driving on straights and on bends).

Raise the car.

Check the alignment of the rims. The hub or brake drum should protrude beyond the edge of the wheel disk or at least be flush with it. Otherwise, replace the wheel disk.

Check the wheel suspension. Also check the condition of the silent blocks, joints, shock absorbers and disks.

Remove and clean the wheels. Remove any small stones that may have gotten into the profile.

Check the tires for wear caused by sudden braking with locked wheels.

Check the profile depth of each wheel and compare the obtained values. If the tires are abnormally worn at the front and/or rear, measure the geometry of all wheels and adjust the toe-in if necessary (at the upper limit of tolerance).

[Text was copied from the portal: www.opelbook.ru]

Attention! To carry out measurements, a special measuring device is required, which is available at the service station.

Conduct a test drive and check if any defects remain, repeat the adjustment if necessary.

Checking the axial and radial runout of wheels

With the car raised, place the dial indicator first on the working surface and then on the side of the tire. Slowly rotate the wheel by hand, watching the indicator readings, and mark the maximum measured value on the tire with chalk.



Acceptable values:

• maximum radial runout - 0.8 mm,
• maximum axial runout is 1.2 mm.

If these values are exceeded, balance the wheel on a stationary balancing machine. The wheel must be centered in the same way as on the car. Using a conical clamping device that centers the wheel by the central hole is not allowed. The permissible residual imbalance for both balancing planes is 5 g.

Elimination of radial runout of wheels

Release air from the tire and remove the wheel.

Rotate the tire on the rim by 120°.

Inflate the tire and check the radial runout again.

If the maximum runout value has increased, rotate the tire relative to the rim by another 120° and measure the runout again.

If the maximum runout value remains, balance the wheel.

Checking the axial and radial runout of the disks

Mount the wheel rim without the tire on the balancing machine or on the car. Attach a dial indicator.

Check the axial and radial runout of the disc. Radial runout (non-roundness) measured on the disk shoulder, and the axial one - on the lateral surface of the disk protrusion. In this case, do not take into account the point "emissions" of readings caused by elevations or depressions of the material.

Acceptable values for steel wheel rim:

• maximum axial runout - 1.0 mm,
• maximum radial runout - 0.8 mm.

Permissible values for light alloy wheel:

• maximum axial runout - 0.3 mm,
• maximum radial runout - 0.25 mm.

If the specified limits are exceeded, replace the disc.