iscmatt
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| posted on 29/1/10 at 12:20 PM |
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What causes squeeky brakes?
Hi guys, here is an easy one for you i'm sure. My dads abarth 500 has developed a high pitch squeek on the front brakes at slow speeds, it
didn't do this when it was bought last november and it was garaged during the all the snow and cold weather.
So, answer below 
Thanks
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blakep82
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| posted on 29/1/10 at 12:28 PM |
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pads not having enough copper grease on the back of them?
________________________
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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David Jenkins
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| posted on 29/1/10 at 12:36 PM |
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as said above - there's usually a smear of copper grease on the back of the pads. Also, some makes have a thin metal shim between the pad and
piston, again with a smear of copper grease.
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Alan M
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| posted on 29/1/10 at 12:47 PM |
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could also be a slight build up of corrosion on the edge of the discs, a drive will sort this, may have to reverse as well. It can also be caused by
the disc pads "glazing"
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wilkingj
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| posted on 29/1/10 at 01:09 PM |
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Take out the pads and clean the metal edges of the backplate of the pad.
Clean the area on the caliper where the Pad fits in the caliper.
Put a smear (and ONLY a smear) of copper grease on the back of the pad where it touches other metal parts.
Its an age old problem for all cars especially when they stand for a while.
Its just annoying, and relatively simple to fix.
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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Canada EH!
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| posted on 29/1/10 at 02:55 PM |
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Rust on the rotors from condensation.
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Canada EH!
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| posted on 29/1/10 at 02:56 PM |
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Rust on the rotors from condensation.
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BenB
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| posted on 29/1/10 at 02:57 PM |
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It can also be a sign of the pads being worn. My megane is doing it yet again- why are Meganes so hard on their rear brakes! Surely that huge arse
doesn't put that much strain on the brakes?
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iscmatt
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| posted on 29/1/10 at 03:31 PM |
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thanks all for the replies
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OX
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| posted on 29/1/10 at 03:39 PM |
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On motor bikes we stopped using copper grease because if the bike was put away after getting wet the mix of metals would cause the brake discs to pit
so used silkolene pro rg2 ,its also heat resistant
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bob
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| posted on 29/1/10 at 05:18 PM |
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quote:
Originally posted by BenB
It can also be a sign of the pads being worn. My megane is doing it yet again- why are Meganes so hard on their rear brakes! Surely that huge arse
doesn't put that much strain on the brakes?
A mate of mine was told by a renault mechanic that the high wear was due to the handbrake mechanism,he changed rears once a year with just above
average mileage. He survived nearly 3 years on the same pads by either not using the handbrake and leaving in gear or being extremely light on the
lever,so must be something in it.
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Angel Acevedo
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| posted on 30/1/10 at 01:14 PM |
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Brake Pad Cosmetic
Motor factors will supply small packets of "specially" formulated grease for this annoying problem.
I have never read the label, but works well.
May be Copperslip though.
Last set of brakes on Dayly Driver was assembled with small dab of silicone grease that I had lying around for Clothes washer repairs.
HTH
ETA: Some pads have wear indicators that start to squeal to tell you their life is coming to an end (Locost for Brake pad transmitters on BMW`s.)
[Edited on 1/30/2010 by Angel Acevedo]
Beware of what you wish.. for it may come true....
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iti_uk
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| posted on 30/1/10 at 08:19 PM |
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Lol, simple question, eh?
My old Tutor at Liverpool University conducted lots of research and development on this problem. Although you can "elasto-plast" the
situation by adding greases and stuff, the real mechanics of what is going on to cause screeching is massively complex.
That said, grease and anti-squeal shims work well enough to make a car comfortable to drive.
Chris
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Angel Acevedo
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| posted on 31/1/10 at 02:26 AM |
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High Temp Silicone
Regarding my previous post, the pads, bolts and shims had a LOT of High Temperature silicone smeared all over.
They didn´t squeal ´till the end of its useful life when the new ones were installed as described.
Beware of what you wish.. for it may come true....
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