Troubleshooting / Squeaking Noise

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• Brake Noise Question

Car Squeaking Noises

Many squeaking noises are created when metal is contacting metal and a linear motion is introduced, or rubber that is forced over a metal pulley. In general, a squeaking noise is trying to tell you there is a problem somewhere in the car. When metal is forced against each other combined with a linear motion a harmonic vibration (squeak) is created that is sometimes audible. In any squeak situation the location of the squeak is sometimes the hardest task to determine. If detection is difficult employ a helper ride in the rear seat of the car to differentiate the noise origin.

The "Car Squeaks"

Brake Pads with Noise Warning Sensor

Drive Belt Tensioner

C. Cheap Brake Pads and Rotors. The brake pads and rotors that are originally equipped on your car are manufactured with high quality metals and brake lining material. There are many after market manufactures that create sub standard brake components. These cheap brake parts can squeak, grumble and wear out prematurely. Beware of brake components that have a "lifetime" warranty. These parts are generally manufactured with inferior martial that will delivery less performance and durability. Always insist on high quality brake components, if you are unsure of the quality of brake parts available OEM (original equipment manufacturer) for best results.

D. Axle Bearing Failure. An axle bearing is designed to support the weight of the vehicle by allowing the wheels to rotate. These bearings are manufactured with high grade steel that resists wear under extreme conditions. When a axle bearing fails it allows metal to contact metal under pressure with a linear motion creating a squeak. Remove axle bearing and replace with new and recheck. Some vehicles are equipped with a bearing hub assembly. This style of bearing is replaced by unbolting the bearing hub assembly and replacing it with new.

Axle Bearing Hub

E. Drive Shaft U Joints. A driveshaft U joint is designed to act as a rotating junction that can be flexible while still transferring energy from the engine to the rear differential. A universal joint or U joint is constructed of 4 bearing caps that house multiple needle bearings. The universal joint is lubricated by adding grease through a zirk fitting on the joint. Some u joints are manufactured with a proper amount of grease and do not need service and therefore do not have a service fitting. If a universal joint fails it can make a squeaking noise that contours the motion for the car. This condition is most noticeable at very slow speeds, and fades at higher speeds. To check for this condition inspect the U joint and look for a light rust powered around the bearing cups. This rust colored powder is caused by metal disintegrating and is a sign of universal joint failure. When a universal joint has failed it must be replaced and can not be repaired.

Universal or "U" Joint

F. Front Brake Rotor Shield. The brake rotor shield is designed to keep rocks and other debris from contact with the brake rotor. This shield is also designed with an added cooling feature that can direct air through the brake rotor when the vehicle is in motion. If this shield contacts the brake rotor it can cause a squeaking noise. To check for this condition inspect the shield and bend shield back into proper position away from the brake rotor.

Troubleshooting / Squeaking Noise

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