Real Cars

All information related to new cars.

Suspension bushes are noise and vibration absorbing rubber components used to improve the car road holding and chassis performance, as well as to reduce tyre wear.  Bushing does not have a maintenance schedule beyond the periodic car inspection. More than that, it requires a thorough inspection in order to identify a damaged suspension bush, because there are no alarming signs that can make you suspect something is wrong before it is too late. High performance suspension bushes offer a better control over unwanted flex in the suspension and ensure that tyres have a greater contact with the road, thus improving road safety and performance considerably. If the suspensions movements are controlled with a greater accuracy, the tyre wear will be dramatically reduced. On the other hand, worn bushes are dangerous, as they lead to premature tyre wear. Bushing deteriorates in time, but also due to contact with petrol, oil, water and battery acid. If you wish to find out the condition of your bushes, you can only make a trip to a mechanic for a check.

How to tell when a suspension bush is bad

Diagnosing a worn bushing

A proper inspection of the suspension bushes starts with a test drive. You must go through a wide range of driving conditions including cornering, hitting bumps, breaking and accelerating suddenly. During the driving test you will not need to pay attention to funny noises, because worn out bushes will not make any noise, you will need to focus on whether you can feel a pull when breaking or accelerating. In order to reveal a failed suspension bush, you will also need to follow up with a dry park test. In this test, you need to account for free play and the noises caused by the turn plates. Too much free play reveals that the suspension bushes have become obsolete and you need replacing.  Another way you can inspect the suspension bushes is going underneath the car and use a rubber hammer to strike the link pins with ball and socket type ends. If you can hear a metallic wrap noise, these might be worn out internally.

Replacing the suspension bushes

Replacement of a degraded suspension bush will increase car safety and performance, as well as tyre life. However, it is important to choose high performance bushing to ensure that road shock, noise and minor vibrations are held in check and absorbed completely so as to ensure that other suspension parts are protected. When replacing the bushes, you will find a few alternatives and options on the dedicated market. Besides the common rubber bushes, you will also find polyurethane and nylon suspension bushes. Nylon has a very bad reputation, because it has no vibration absorption quality, while polyurethane is considered the ideal material for a bush, but not many people are willing to purchase this type of bushes, because they are ten times more expensive than regular rubber suspension bushes.