Squeaky Brake Pads Please Help

[twinz]

Hey guys I have a squeaky brake issue. I have slotted brake disc and then have heavy duty brake pads and they squeak every time even when there hot and cold its really loud and annoying, has anyone here on this forum had any problems like this also.

[andymoocow]

do a search on here for things like "noisy brake pads" "brake pad squeal" anything else like that and you will find HEAPS of threads with peoples tips and pointers for getting rid of the squeaking, GOOD LUCK!

[_Ryan_]

every time i have had my pads squeal y i have sorted it by getting a shitload of heat into them then cooling them off again... i still occasionally get a light squeal in traffic when i sorta JUST have my foot on the brake(creeping forward in an auto) but that is easily avoided...

try 100-80 5 times really fast then cool them off(fwy for ten mins), if that doesnt solve it, a good hills run should

[twinz]

every time i have had my pads squeal y i have sorted it by getting a shitload of heat into them then cooling them off again... i still occasionally get a light squeal in traffic when i sorta JUST have my foot on the brake(creeping forward in an auto) but that is easily avoided...

try 100-80 5 times really fast then cool them off(fwy for ten mins), if that doesnt solve it, a good hills run should

ok then thanks dude. legend

[jkotsa]

Hey man go to repco and buy a can of de-squeak i had exactly the same problem. I put bendix ultimates and they would squeak everywhere and didnt matter if i put heat in them or not. This is the only thing that helped. spray it directly on the rotor.

Edited April 15, 2009 by jkotsa

[joeyjoejoejuniorshabadoo]

copper grease on the shims behind the pads.

i run full metal on slotted rotors and they are silent as stock for nearly 10,000km

[Wacky Dee]

how's that work? copper grease on shims behind pads .. ??

[simpletool]

Indeed copper grease on shims - just a light 0.5mm coating all over the shim. The noise is likely from the shim vibrating against the back of the pad and the shim against the piston (metal on metal vibration).

I tried all the other remedies and this works for about 20,000km for me. The copper in the grease stays on the surface even after the grease wears/burns off leaving a lower friction surface.

Obvioulsy be careful you do not get grease on the rotor or pad surface (or close to it) - only on the shim/back of pads. And when I say shim - I meant shims

Edited April 23, 2009 by simpletool

[Wacky Dee]

so it normal procedure to put copper grease between the shims and back of the pads ?? Because I don't recall the mechanic putting any grease on after installing the new pads and rotors

[chook]

yep, its normal, part of the assembly procedure in the Nissan workshop manual as well.

[Wacky Dee]

strange I'll have to have a chat to them about that then ... seems like a humongous waste of time if they gonna have to take the pads off again Thanks

[chook]

a workshop could do it easily in an hour.

[joeyjoejoejuniorshabadoo]

srsly it works a treat

[Wacky Dee]

does it matter what sort of grease it is ? is there a specific one for this application?

How can I check if I still have the shims ? My rotors and pads were changed ..I've read in some other threads sometimes you lose your shims ?? All a bit confusing as I still can't picture wtf "shims" are or how they're used in brakes even though I've read an aticle about it on "how stuff works"

Edit: never mind about shims ..this page explains it a bit better (picture paints a thousand words) http://www2.zhome.com:81/ZCMnL/PICS/BrakePads/BrakePads.html Still don't see how this would affect squealing however .. I thought the squealing is simply due to the friction between hard pad surface which probably has some metals in it against a metal rotor..hmm. So metal on metal = squeal... But since some pads are softer or contain rubber etc they don't squeal... or so I thought.

Edited April 23, 2009 by Delta Force

[andymoocow]

At first i thought it was the surface that was squealing, then i heard that its the vibrations that make them squeal. I am still unsure as to what it is, can anyone confirm this?

I had 3 set of aftermarket pads in the rear of my R33 GTST, all squealed, went back to stock, no worries at all. Then i got some RB74 pads in the back, squealed like crazy, did a big track day on them and now they are dead silent. See how they go for a while i guess.

[Wacky Dee]

Ok I've tried everything and they're still squealing as soon as I put a bit of heat in them (a couple of hard brakes does it) Just had the shims on the front pads covered in copper grease and they're still squealing like a bitch.

I think some pads just squeal and that's it ... QFM HP-X are loud squealing bitches. Time to get Nissan pads I think. Anyone know how genuine Nissan OEM pads (front) cost for an R34 GT-T ?

[madbung]

If you're a lazy bastard and enjoy a good short-cut.

Spray a small amount of wd-40 on the rotors, then drive slowly around the block a few times with your foot on the brake (until you get full braking back) be very careful at first because you won't have a huge amount of stopping power until you burn the excess wd-40 off...Bob's your uncle. You might have to do this a few times for a permanent result.

Screaching bakes are generally caused by too much brass in the pad compound....never had these problems with asbestos pads

Ahhh the dangerous old days.

Edited May 30, 2009 by madbung

[Wacky Dee]

please explain the science behind WD40 stopping brake pad squeal ... I think my mechanic was right, if a pad squeals nothing will shut it up because it's just the pad material causing too much vibrations and the only solution is to get a different pad

[madbung]

Science?

Lol gtfo..... it works, there is your science, there is your solution.

I'd assume it's because a part is squeaking, you add lube...burn off excess and embed enough into the pads to stop the issue at hand.

Use it or not, makes no difference to me. It's your money Ralph.

Edited May 30, 2009 by madbung

[Wacky Dee]

Great science there, put a lubricant onto brakes which require friction ... The only way i can see this MAYBE work for SOME is if the WD40 collects enough pad dust (just before you kills yourself) to clog up the small gaps which cause vibrations, but that's just dangerously stupid, sorry. Copper grease on the shims tries to achieve the same and is a better/safer solution but even that doesn't work (for me) because of the pad material causing just too many vibrations.

Edited May 30, 2009 by Delta Force