Yes Another Brake Squealing Thread

[tek_01]

hey all got the usual shit squeal with my r33, no matter what i do they sqeal

what ive done

new rotors front and back, slotted from the group buy

cheapie pads up front

cheapies at rear (different brand)

and guessing stock nissan handbrake shoes

used anti squeal, and i have all my shims

bled the system and have braided lines not like it makes a difference

bed them in properly but still got the squeal

sometimes it comes from the front, sometimes back sometimes both and yes EVEN the handbrake squeals (use it sometimes coz its so embarassing pulling up to lights on a bad day)

so the only common thing is the brake rotors... it is only when slowing down say under 30kms an hour they start to squeal

WHY WHY WHY

anyhow they weren't as bad before (still some squeal) with standard rotors and standard nissan pads up front so this is not acceptable, there has to be a reason.... cannot just say thats the way it is

anyone have anything i can try or any theories??

[craked]

take the pads out and rub them on the conrete then make the edges slightly around not a right angle. give that a go

[tek_01]

oh forgot to mention that i also chamfered the leading and trailing edges of the pads and rubbed them with 80 grit sandpaper

thanks

[Lunatikk]

Describe what you did to "bed them in properly"

[tek_01]

3 stops from about 60 to 10 than another 5 stops from 100 to about 20 (medium force). drove around for ten minutes than parked the car

Edited November 26, 2007 by tek_01

[mattymagoo22]

were the rotors completely clean before you took it out to bed in the pads, did they have any greasy finger prints or oil still on them, as when the brakes get real hot left over gunk on brakes tend to cook and make them squeal.

Just a thought.

[bubba]

I'm having the exact same problem but with stock 33gtst rotors and bendix ultimate pads. It's got us stumped, the only thing that has had any effect on the squeeling was lubing between the calipers and the back of the pads but even that only last a couple of days.

Doesn't do it EVERY time but more often than not and it's when I brake lightly coming up to traffic lights etc. Mechanic says he can feel a vibration when it does it.. going to try skim the rotors next and see if that helps.

[Frink]

i get the same problem, only without the vibration. i put my problem down to brake dust....

however, with a vibration, it could be number of different things. a slightly loose bolt in the caliper, shims missing or around the wrong way or even just a small stone stuck in your brake pad...

[bubba]

I don't think it's a huge vibration as I can't feel it, he was in the passenger seat when it squeeled bad and said it was a vibration.. I think the squeeling is a minute high frequency vibration.

I should really have skimmed the rotors when I put them on, they are 2ndhand 33gtst items. Looked fine when I put them on but the bendixz pads seem to have lipped the rotors fairly quickly

Edited November 27, 2007 by bubba

[craked]

ok put copper grease on the the pads where they sit in the cailper and aslo grease the piston where they touch the pads BUT REMEMBER DONT THE GREASE ON THE PAD SURFACE

[bubba]

Tried that, like I said above, only last a couple of days.

[tek_01]

to the few posts above, yes i did clean the new rotors with brake cleaner to make sure theyre not oily

exact same problem as bubba, 90% of the time squeals 10% doesnt

its bullshit

[_Ryan_]

i use turps to clean rotors, never had squeals.

-Ryan

[tek_01]

i would hardly think using brake cleaner would cause squeal as that is its designed purpose

i might try this copper grease just got a laugh to see what happens

just to make sure i do it correct there is 2 shim and then the pad

so...

piston -> shim 1 -> shim 2-> brake pad -> rotor

so i put grease between piston and shim 1 & shim 1 and shim 2 and even between shim 2 and brake pad?

[white33gtst]

what is actually squealing? is it the pad on the rotor or caliper piston on the backing plate of the pad? im just unsure thats why im asking. does it only do it wen braking at low speeds because you aren't putting as much pressure on the pedal and so the pad/caliper piston is only slightly engaging?

my car is doing the same after putting in bendix pads, its pretty annoying to say the least

Edited November 28, 2007 by white33gtst

[tek_01]

i dont know what is causing the squealing but it is only coming to a stop, so pulling in to a driveway it does it the worst

sounds like the pad on the rotor but who knows

[bubba]

I'm running bendix pads aswell, does it at low speed with light pedal application but once it starts squeeling, it doesn't matter how hard you push the pedal - it doesn't go away till you come to a dead stop.

[white33gtst]

did you bleed the brakes after resetting the caliper pistons to put the new pads in? if there is air in the brake lines would this give the caliper piston some play? that would let the brake pad vibrate slightly enough to give off the high frequency squealing?

ok just noticed u did bleed the brakes. did u bleed them at all 4 corners?

Edited November 29, 2007 by white33gtst

[tek_01]

yeah i did but im going to do a full brake flush when i get the chance with some new fluid and thinking of getting some QFM pads for the front, use copper grease and hopefully i get some better results

with standard rotors and stock nissan pads it done it maybe 20% of the time but this is like 80% if not more

[craked]

last option use genuie pads or get a brake up kit pm me if you want one