Car coil spring rear and front

People use springs for 100 years now. The operating principle is simple but it is still used in almost all life and profession domains whether it's a simple pair of tweezers or it is used in the most complex production machinery in modern industry. There are springs of different size to sustain different loads. Each spring is compressed under load and when the force is removed, it returns to its original state.

In the car spring serves to keep the same distance between the car body and ground. Sure, it varies in the place of the spring deflection. But the distance is equalized due to the force, without which this technique would be left up directly to the motor vehicle components and car driver. It is very important the spring to be correctly installed. If there are worn-out or broken details, it is necessary to replace them. Malfunctioning vehicle working components lead to thousands of serious accidents every year.

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How to identify faulty coil springs

If vehicle steerability has deteriorated, and you hear constant knocking when driving, the coil spring may be out of order. The fault should be eliminated promptly, otherwise, any unit of the suspension may fail. If the spring has partially lost its elasticity, and is not replaced in time, it may finally break right on the road, which will result in much more serious consequences.

Faulty springs may be identified visually. However, a better solution would be performing diagnostics at a specialized service station, with the use of proper equipment.

The process of diagnostics in this case will look as follows:

1. Thorough rinsing of the component.
2. Detailed examination of the spring for mechanical defects.
3. Measuring the length of the component. If it is shorter than required, the spring should be replaced.
4. Checking the spring for deviation from the perpendicular position. If the value exceeds 1.5 degrees, the component is to be immediately replaced.

The state of the springs should be assessed during each maintenance. The average lifetime of the components is 200-250 thousand km of mileage. At the same time, the springs are to be compulsorily replaced when the shock absorber is replaced, as well as after an accident where the front and the rear axle of the vehicle have been damaged.

You may notice that the coil spring requires diagnostics by the following criteria:

• knocks on the body are heard when driving;
• the front part of the vehicle bends or rises a few centimeters;
• the vehicle lurches to the left or to the right;
• if the hood of the vehicle is pressed with hands, it will oscillate up and down, or will remain in tilted state;
• the vehicle sagged down.

The reasons of coil spring malfunctions

First, the spring may lose elasticity due to its normal wear. The component may also get damaged due to coils rubbing against each other. When the car is excessively loaded, the springs are compressed to the maximum, which results in their mechanical defects. Chips, cracks and other damage may also occur due to the hitting by stones on the road. Frequent overloading the vehicle, or driving on uneven roads result in reducing the height of the spring. Exposure to increased humidity and thawing chemicals lead to corrosion.

Repairing and replacing coil springs

If the springs proved to be serviceable after a careful examination, and there is no need to replace them, swap them from the right side  to to left. It makes sense if only one person is using the vehicle, and it is not used for carrying loads. Due to swapping the components, the spring that had not been subjected to loads, while being on the passenger side, will be installed on the driver's side.

The coil springs kit should be replaced with the use of special equipment, so replacement should better be performed at a service station.