Spring service requirements can be found in the service manual of the vehicle you are working on.

Spring fatigue (weakening) can occur after prolonged service. The fatigue lowers the height of the vehicle, allowing the body to settle toward the axles. This settling or sagging changes the position of the control arms, resulting in misalignment of the wheels. This condition also affects the ride and appearance of the vehicle.

To check spring condition or torsion bar adjustment, measure CURB HEIGHT (distance from a point on the vehicle to the ground). Place the vehicle on a level surface. Then measure from a service manual specified point on the frame, body. or suspension down to the shop floor. Compare the measurement to the specifications in the service manual. If the curb height is too low (measurement too small). replace the fatigued springs or adjust the torsion bar.

NOTE

For instructions on the removal and installation of springs. refer to the manufacturer's service manual.

The vehicle should also be at CURB WEIGHT when checking spring condition and curb height. Curb weight is generally the total weight of the vehicle with a full tank of fuel and no passengers or cargo. Also, make sure nothing is in the passenger compartment that could possibly increase curb weight. Curb weight is given in pounds or kilograms.