| [ Total Views: 1387 | Total Replies: 17 | Thread Id: 80978 ] |
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 alien8
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| posted on December 24th, 2009 at 02:49 PM |
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Sqeaky front brakes?
My front RHS disk brake squeals when light pressure is applied. pads and bearings are not old or worn. It does not make a sound when the brake is
steped on with firm pressure. I can not see any signs of metal to metal contact. I removed the pads and flipped them over but the squeal is still
there. Whats some reasons for sqeaky brakes?
Focker out.
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68AutoBug
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| posted on December 24th, 2009 at 03:06 PM |
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| Quote: | Originally
posted by alien8
My front RHS disk brake squeals when light pressure is applied. pads and bearings are not old or worn. It does not make a sound when the brake is
steped on with firm pressure. I can not see any signs of metal to metal contact. I removed the pads and flipped them over but the squeal is still
there. Whats some reasons for sqeaky brakes?
Focker out.
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Hi
I used to have squeaky brakes on a type 3 many years ago..
it was just dust or very small stones on the pads...
You used to be able to buy a product that stopped squeaky brakes.... many years ago... ??
I never ever used it...
I always just thought if they are squeaking...
they ARE working... lol
these days, disc brake pads do have some metal in them as asbestos is no longer used...
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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jsheppard64
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| posted on December 24th, 2009 at 10:05 PM |
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my brother used grease on his front discs hyundai excel
it stopped squeal. but it the back locked up when braking normally, wonder why
i degreased it, a bit of detergent, hose off.
and brakes return to normal with no squealing.
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alien8
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| posted on December 24th, 2009 at 11:41 PM |
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I am a bit hesitant to put any lub near the disc. I have see that brake squeak stuff at the local part stores. Might go read the label. Its annoying
me to the point of turning on the radio loudly to not hear it. I would way rather listen to the engine noise as usual.
Or just spray them down with degreaser?
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 matberry
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| posted on December 24th, 2009 at 11:47 PM |
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With most aftermarket pads you dont get the anti-vibration plates that always got replaced with the og disc pad kits. Maybe your plates are dented,
not there or aligned with the piston incorrectly. Also a build up of dust or even the caliper seals are damaged and upsetting the way the pad sits on
the piston, also what brand of pad, Ate are best IMO.
DONT LUBE THE BRAKE PADS  
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alien8
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| posted on December 25th, 2009 at 08:56 AM |
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Those little metal anti vibration plates I have are as old as the hills.I will recheck to see if there in there correctly and go buy some new ones.
Cool, I never new what they were for. The calipers are ATE and the pads are Bendix.
I have noticed the fronts do spit out a lot brake dust.
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Joel
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| posted on December 25th, 2009 at 11:22 AM |
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Brad are they single or duel pin pads?
last time i chucked new ones in mine they squealed like a pig and when i checked i'd left out the butterfly clip/retainer thingys that sit between
the pins
chucked an old pair in and problem gone
they make the pads out of such soft compound these days so the discs last longer. makes for lots a brake dust
sucky thing when you have thinnly spoked rims that are a pain to clean
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alien8
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| posted on December 26th, 2009 at 01:09 AM |
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Hey Joel. Yep, they are two pin calipers. I am pretty sure I put those clips back in. The brakes did not make a sound for a few months after going
through the whole system. But tonight the left side started doing the same thing. I am thinking it is sounding more and more like the pads are the problem. I painted the rims white a few weeks ago so you really
notice how much dust these things are spitting out.The disc surface is still pretty good so I think I might try a different brand of pads or throw the
old ones back to see if they do the same.
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Gixer41960
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| posted on December 26th, 2009 at 05:10 PM |
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I was watching a car restoration show on Fox and they used a copper grease or something like it to stop the pads from squeeling. Can anyone else shed
more light?
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Sides
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| posted on December 26th, 2009 at 05:35 PM |
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Yeah, like Matt said - don't go putting grease or lube near brake rotors.
Braking is all about friction.... grease and lube are specifically designed to remove friction.... so although grease or lube might stop the squeal,
it's definitely going to affect how well the brakes work.
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jsheppard64
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| posted on December 28th, 2009 at 02:03 AM |
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well you could try one of those brakleen stuff from repco.
someone here told me to use that when my flywheel came out and soak my clutch in oil.
but i didn't use it since i'd have to go and buy it. what i used was degreaser.
sprayed on brush it. hose off. detergent and brush. left it to dry
and it's back on and i don't have "torque converter" anymore.
but that's a clutch.
you could try clean it first.. before replacing stuffs.. or resort to lube
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Matt Ryan
A.k.a.: Matt Ryan
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| posted on December 28th, 2009 at 09:16 AM |
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| Quote: | Originally
posted by Gixer41960
I was watching a car restoration show on Fox and they used a copper grease or something like it to stop the pads from squeeling. Can anyone else shed
more light?
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More than likely a can of spray on copper gasket, most often used with head gaskets on water pumpers to help take up minor distortions in head and
block surfaces. It sets hard but as copper is one of the softer metals it will take up the slack.
Brake pad squeal is from a high frequency vibration of the pads against the callipers. Spraying a thick layer of copper on the back of the pad gives a
cushioning surface on the side that contacts the caliper, which is where the noise comes from. (unless you have a really hard pad
surface, then squeal can come from the disc side too)
Dust is a factor in brake squeal but only in that it affects the position of the pad and the frequency (speed) of vibration. If there is a soft
backing on the pad (which they all have when brand new but it wears off quickly) then dust won't make any difference.
The various thin metal plates and springs on the pins through the pads that some manufacturers use, are a way to stop vibration or at least reduce it
to an inaudible frequency.
Also it doesn't hurt to give the callipers & pads a real good squirt with the hose when washing the car, just turn the wheels on full lock in
each direction to give you some room to get in there. It will also leave less dust to get on your wheels too!
Regards,
Matt.
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alien8
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| posted on December 28th, 2009 at 11:26 AM |
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Hey Matt, Thanks for the explination . That would make sense as the front left started squeeling 2 weeks after the right. I noticed the rhs pad
backing was starting to wear through the protective/anti vibration coat.
What other kinds of product can be used on the pad backs besides the copper spray?
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Matt Ryan
A.k.a.: Matt Ryan
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| posted on December 29th, 2009 at 09:48 AM |
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alien8,
Can't think of any brand names off the top of my head but most of the stuff auto parts shops sell as anti brake squeal products involve coating the
back of the pads.
Make sure you read the labels carefully, as some of them contain some really nasty toxic and or carcinogenic ingredients.
Regards,
Matt.
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alien8
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| posted on December 29th, 2009 at 11:33 AM |
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Fixed! no more squeeks
I pick up this red goo from Supercheap to coat the pad backs.Its like a sticky rubber when it drys.
Thanks for the help all
Brad.
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Matt Ryan
A.k.a.: Matt Ryan
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| posted on December 29th, 2009 at 11:39 PM |
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Brad,
Let me know how it goes, out of curiosity (I'm running drums) I would like to hear how long the "red goo" lasts. There's a spray on version of it
too, for just a few bucks more.
I was in supercheap today too and saw the copper spray for $30 for the small size tin. I reckon you would get 3 or 4 sets of pads done with that,
easy, maybe more. You would only need to build up to a millimetre or so of copper on a new pad.
With the copper spray, given the shortish life of spray cans once they've been used, I would advise (at that price) getting a few sets of pads and
doing them all at once or, going halves with a mate and do two or three sets each, then it would work out quite cheap.
A decent spray of copper will usually see a set of pads through to the end of their useful life, that's why I'm interested in hearing how long the
"red goo" lasts.
Don't forget, it's time to replace pads when they are under half of their original thickness, unless you are really anal and check them all the
time. Most normal people just look at them when they are doing a service or have the front wheels off for some other reason. If you don't get them
early you end up with worn discs and sometimes, overheating wheel bearings.
Regards,
Matt.
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Gixer41960
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| posted on January 12th, 2010 at 05:29 PM |
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Thanks for all the advice Matt, I found it really helpful especially if my brakes start to squeel worse than they are now. I couldn't agree more on
checking the pad thickness, I don't like the thought of only a milimetre of material protecting my life.
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alien8
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| posted on January 12th, 2010 at 07:26 PM |
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Hey Matt. well, two weeks in and no squeeks yet so I guess the goo's not complete bollocks. I have pressure hosed the calipers a few times since
smearing it on and its all good. It called Dynagrip Squeel Free. I saw the copper spray at Supercheap too for $30 and thought it was a little pricey
to do one set of pads.The Dynagrip was ten bills and I used stuff all. I would say the bottle would last a long time being a paste in an air tight
bottle. You can get little sachet of a similar product from SC for a few bucks too.All good!
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