Definitely the defining component of a suspension, the strut is a combination of a shock absorber and a spring. This is also commonly known as coil overs. Add the bushings and the nuts, screws, and bolts and you have the whole strut assembly. Connected to the steering section of the vehicle, struts take in the energy generated from the interaction of the wheels and tires with the surface. A failure within the strut assembly can be potentially disastrous as it can render the car uncontrollable while severely destroying other parts of the suspension system. Keep a close eye on these telltale signs of a failing Cadillac El Dorado Strut Assembly.
Whenever you feel like the car is bouncing crazily up and down, like nothing is dampening the impact, the strut has bottomed out. Bottoming out is a symptom of an already failed strut. This can be experienced when the tires goes by an uneven patch on the road such as a large hole or a rocky pavement. The strut doesn't have enough force to combat the bouncing motion. It can be caused by shock absorbers with shock fade or worn out springs.
Wheels swerving unintentionally mean that the shock absorber is not able to do its job. Aside from the control arms which guide the wheels, the shock absorber in the strut assembly is responsible for controlling the wheels' up and down movement. That the reason why the strut assembly has a shock absorber in the middle. Without the ideal response from the shock absorbers, the springs would make the car's body bounce uncontrollably onto pavement, leading to unresponsive steering.
Body roll is a naturally occurring phenomenon whenever the car turns. The force generated by the car into one direction is opposed by another force going to the other direction. The suspension is keeps the car safely glued on the road. However, after years of continuous motion, the spring and the shock absorber tend to deteriorate and absorb less energy. This heads to excessive body roll upon cornering. Once this happens, replace the strut assemblies immediately.