Checking and adjusting wheel alignment angles (Opel Astra J)

Checking and adjusting the wheel alignment angles is necessary to ensure good stability and control of the vehicle, as well as uniform wear of the tires during its operation. Checking and adjusting the wheel alignment angles is performed on special stands according to the instructions for their operation.

Check the wheel alignment angles on the vehicle without a load, with a half-full fuel tank, normal air pressure in the tires, and no excessive play in the suspension units.

After installing the car on the stand, immediately before checking the angles, "squeeze" the car's suspension, applying a force of 392-490 N (40-50 kgf) two or three times, directed from top to bottom, first to the rear bumper, and then to the front. The car's wheels should be parallel to the longitudinal axis of the car.

When checking and adjusting installation angles front wheels first check the caster angle, then the camber angle and lastly the toe-in.

Angle of longitudinal inclination of the axis of rotation the front wheel is formed by a vertical line and a line passing through the middle of the upper support of the telescopic strut and the center of the sphere of the ball joint, fixed on the lower arm. The design of the car does not provide for adjustment of the longitudinal tilt angle of the steering axis.

Camber angle the front wheel camber is characterized by the deviation of the average plane of rotation of the wheel from the vertical. The design of the car does not provide for adjustment of the camber angle of the front wheels.



Convergence the front wheel toe-in is the angle between the plane of rotation of the wheel and the longitudinal axis of the vehicle. The front wheel toe-in is adjusted by changing the length of the steering rods.

Adjusting the camber and toe angles rear wheels the vehicle design does not provide for this. Discrepancy between the actual values measured on the vehicle and the control values specified below may be caused by wear and deformation of suspension parts, as well as deformation of the body. If deviations in the parameters of the rear suspension are detected, caused by deformation of its elements and the body, it is necessary to find the cause of the deviations and eliminate it by replacing the failed parts.

[Material copied from this website: www.opelbook.ru]

Attention! Replacement or repair of suspension parts may result in changes in wheel alignment angles, so checking wheel alignment angles is mandatory.