car springs – coil springs and their role in vehicle suspension

car springs – coil springs and their role in vehicle suspension

Car coil springs are one of the most important components in a vehicle's suspension system. Their main function is to absorb shocks from road irregularities , maintain the car's ride height, and ensure a comfortable and stable ride. The most common type of spring on modern cars is the coil spring , which ensures durability, smooth suspension, and good handling.

This article provides a comprehensive overview of car springs, their working principle, types, maintenance, and common problems.

car coil springs

What are car coil springs?

Car coil springs are elastic metal parts that:

  • bear the weight of the vehicle,

  • dampen shocks and vibrations,

  • keep the tires in contact with the road surface,

  • ensure stable operation of the suspension system.

Every time the car goes over a pothole or hill, the springs contract and release to reduce the impact that would otherwise be transmitted directly to the body and passengers.

coil springs – the most common type of spring

What is a coil spring?

A coil spring is a spiral-shaped steel spring that works on the principle of torque and flexibility. It is the most common type of spring in both front and rear suspension.

coil spring functions:

  • load-bearing support: support the weight and ride height of the car.

  • ensuring a soft and comfortable ride: absorbing unevenness in the road surface.

  • increasing stability: in cooperation with shock absorbers, they keep the car controllable even when cornering.

  • vibration reduction: dampens shocks between the body and the wheels.

Where can I find coil springs?

  • in most modern passenger cars, both front and rear.

  • as part of the McPherson suspension with shock absorber strut.

  • in double-link and multi-link suspension systems.

types of car springs

Although coil springs are the most common, other spring types are also used on different vehicles.

1. coil springs

  • universal and durable solution.

  • suitable for cars, SUVs and many smaller trucks.

2. leaf springs

  • mainly used on vans, vans and heavy trucks.

  • can carry a very heavy load.

3. air suspension (air springs, air suspension)

  • ensures a very comfortable ride.

  • adjustable height.

  • used on luxury cars and newer SUVs.

4. torsion bar suspension

  • in some older cars and SUVs.

  • compact and with adjustable stiffness.

but for a typical passenger car, coil springs remain the most important and widely used solution.

How do springs work with shock absorbers?

The spring's job is to absorb the shock , but that alone would cause constant "bouncing".
therefore, the spring always works together with a shock absorber , which:

  • dampens the up-and-down oscillations of the spring,

  • keeps the car stable,

  • ensures good handling.

together, these two form the main elements of the suspension system.

signs of spring wear

Springs can rust, fatigue, or break over time. Common symptoms:

  • the car sits lower on one side than the other.

  • metallic clanking or clicking sounds are heard.

  • the ride becomes stiffer or unstable.

  • greater body lean when cornering.

  • faster wear of shock absorbers (because the spring no longer provides sufficient support).

If you notice any of these symptoms, you should have your suspension checked by a specialist.

Why do car springs wear out?

  • Road conditions: Potholes, curbs and gravel roads accelerate wear.

  • Cold and road chemicals: cause rust and weakening of the spring metal.

  • Overloading: Continuously driving with a heavy load shortens the life of the spring.

  • Driving style: abrupt driving techniques and crossing thresholds at too high a speed.

When should you change the springs?

springs should be replaced:

  • if the spring is broken or frayed,

  • if the vehicle sits lower than usual,

  • if the suspension behaves unstable,

  • recommended in pairs (both front or both rear springs at the same time).

Replacing them in pairs ensures smooth suspension operation and better handling.

summary

Car springs , especially coil springs , are key components that affect:

  • driving comfort,

  • security,

  • controllability,

  • the car's ride height and weight distribution.

Although they may seem like simple metal coils, their role in a car's suspension is crucial. Regular inspection and timely replacement, if necessary, will help ensure that your car moves stably and comfortably, even on difficult roads.

You can buy car springs here!