Symptoms that something goes wrong

Today I have the impression that solve some mysteries in one article: “I hear a horrible noise when turning,” “the rattles sometimes steering wheel, and is heard as if something were scratching below the engine” … It will be symptoms of different breakdowns, and seeing the little car can guess, but many of these descriptions usually come from the same disease: the constant velocity joint .

It is a matter of importance, because the stop turning the wheel, ducking and keeping an eye on the inner side of the wheel we were quiet, or go to the workshop. In the case of cars with rear-wheel drive or it costs more to see and have to drag the belly on the ground, but it is difficult to catch the fault before the face. You catch him in time mean € 100 and expected to all parts of the constant velocity joint break takes about 600 € .

noise when turning the steering wheel

What is the constant velocity joint?

Together fixed constant velocity, together scrollable constant velocity ball and scrollable tripods … Engineering has been tumbling toward more elaborate systems, although it is clear that the force that makes the engine has to reach wheels, and this is done with a rods which are the central block to the tires that make the drive.
Each ‘stick’ is called shield . And the bearings will rotate as slowly and as fast as the power of our car will allow us and as we demand the accelerator.

This very logical question being exposed, one can only expect that the constant velocity joint is the connection between the drive shaft and the wheel. Within the constant velocity joint there are several pieces, and it is best that we stay out of the complex details, because this inner part changes greatly depending on vehicle model; with the purpose of not straying constant velocity joint must be thought of as a joint limb of a person ; as if they were an elbow or a knee or an ankle or wrist.

Seen this way, we get the idea that within our joints are no bones, cartilage, tendons, ligaments … And especially lubricating fluids so that the movement is smooth and natural.
The same applies to the constant velocity joint. It is covered with a rubber skin, with wrinkles that give appearance of accordion, and most manufacturers call ‘bellows’ or ‘dust’ . It is a protective layer must be snug and perfectly embraced so that no thickening of the constant velocity joint escape and, especially, to keep out stones, sand or other objects that end up leaving battered parts of constant velocity mechanism .


The life of the constant velocity joint is expected to be as long as the car itself, but something else is the bellows; It is a simple rubber, and is decaying. Depends on the use, maybe the dust stretches his life up to 100,000 kilometers . Although if you live in areas with many dirt roads, or where it snows often and salt to asphalt strip, the material of the bellows becomes dry and cracking before. There are cases in hostile conditions and intensive use where the 40,000 kilometers stays in state replaced. So you have to take a look at each annual review; with overalls, a board can rob, and so affect the drive shaft at a point that will not be the thrust of the engine to the wheels. And here the cost of repair is raw.
Technicians also have been making their tests with the fat that gives ease the movement of the constant velocity joint. There should be no excess or defect, and qualities of viscosity and durability opened many debates. It is quite common today mixed with a chemical compound of fatiguing name to write and pronounce oils are used: molybdenum disulphide. This porridge pharmacist what I have come to inquire, is the one that best fits almost all types of constant velocity joints.