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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22907
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Octavia L&K 2010 vintage makes fairly high pitched eek eek

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Octavia L&K 2010 vintage makes fairly high pitched eek eek eek noise at moderate speed . Dealer who supplied it (Autosales Burntwood) unhelpful. Sounds like it's related to wheel motion and is possibly coming from the back.

If the noise only comes in with vehicle speed then its likely to be a wheel bearing or brake pads picking up on the disc

1st thing to check for is worn suspension joints - jack the car up so the wheel is off the ground (you’ll need to do this for all 4 corners) and shake the tyre from top to bottom and from side to side (with someone holding the steering wheel on the front) there should be no play in either direction. Any play in 1 direction will usually require a joint to be replaced, if there’s play in both directions then the wheel bearing may be at fault.

if the noise is brake related ( does it stop when you brake hard) then try the following:

1) strip the calipers down, remove the pads and clean out all the pad grooves and location in the caliper, smear a thin layer of copper grease on the metal back of the pads where they touch the piston and where they rub in the tracks of the calliper also clean the calliper tracks of debris and dust before re-fitting the pads.

The copper grease won't melt under hi temps so DO NOT get it on the brake disc or friction face of the pads, it does however keep the brakes working smoothly and help reduce any squeal as it damps things out

2) As above but fit an anti-squeal shim as well, these are a either stainless steel shim or sticky plastic pad which fits between the piston and pad and also acts as a vibration damper.

3) file a small chamfer on the leading edge of the pads as this encourages the pad to sit squarely on the disc and not point load on one edge

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