Help! squeeling noise.

[scrawf05]

Can anyone help me? occaisionly i keep gettin a squeeling noise from the front left hand side wheel. only happens every so often when i'm driving. usually wen i'm slowing down or speeding up. help please. cheers.:y:

[BobC]

Coul this be break squeal?

From Wiki:

>> SNIP >>

Brake squeal
Sometimes a loud noise or high pitch squeal occurs when the brakes are applied. Most brake squeal is produced by vibration (resonance instability) of the brake components, especially the pads and discs (known as “force-coupled excitation”.) This type of squeal should not negatively affect brake stopping performance. Simple techniques like adding chamfers to linings, greasing or gluing the contact between caliper and the pads (finger to backplate, piston to backplate), bonding insulators (damping material) to pad backplate, inclusion of a brake shim between the brake pad and back plate etc, may help to reduce squeal. Cold weather combined with high early morning humidity (dew) often makes brake-squeal worse, although the squeal stops when the lining reaches regular operating temperatures. However, some lining wear indicators are also designed to squeal when the lining is due for replacement. Overall brake squeal can be annoying to the vehicle passengers, passers-by, pedestrians, etc especially as vehicles are designed to be more comfortable and quieter. Hence vehicle NVH (Noise, Vibration and Harshness) is one of the important priorities for today's vehicle manufacturers.

One solution is to put a small amount of copper grease onto the back of the pads where they contact the brake caliper piston and on the pad shims, if present. While this will normally stop the squeal, getting grease on the pads or disks will affect braking performance.

Dust on the brakes may also cause squeal; there are many commercial brake cleaning products that can be used to remove dust and contaminants from the brakes.

Apart from noise generated from squeal, brakes may also develop a phenomenon called brake judder or shudder.

Brake squeal on some pads is caused by a layer put in by the manufacturer that makes them squeal when they need replacing.

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Cheers

[vts_nico]

some kind of worn bearing?
probably won't be brakes if you hear it too when you're accelerating.

[Dannep]

belt to tight?