Can anyone help with any ideas on this one :

On the RST I have had a squeaking coming from the front drivers side wheel for a while now, and have been trying to cure it. The squeak isnt constant it only makes a noise on one 1/4 of a revolution of the wheel.

So far have check that caliper isnt seized and it returns all ok after the brake pedal is released.

There wasnt any play in the wheel bearings but took the hub off to check and found the hub was worn and there was play in the bearing when no load on the hub shaft. I replaced the hub and fitted a new set of bearings, put it all back together.

I still have this squeak

Is seems to be the brake disc touching the pad as the wheel rotates and causes a high pitched squeak. Theres NO brake judder but could the brake disc be warped causing it to touch the pads and thus make the noise ??? The discs are Tarox groved and drilled and wasnt cheap, the pads are mintex 1144 if that helps.

The squeak does get worse when turning left and is silent when turning right, i guess when the weight transfers from side to side.

Any ideas cos i have thrown a good few hours and ££ at this problem now and cant find a cure for it

 

Have you copperslipped the back of the pads? when they are dry then they vibrate and you get the squeal.

Steve

 

Is it the wheel touching the caliper ? Is it just on a normal rotation, i.e. jack the car up and spin the wheel round ? Is there a mouse trapped in there ? Is it your wallet opening whilst your bending over to inspect it ?

 

Had exactly this on my old setup, its the mintex pads m8, 99% sure of it. I kept taking mine out every 2 weeks or so, rubbing the surface down and slicking the backs back up as they kept glazing over and causing the high pitched squeal (it used to get really bad) I know others have mentioned this with the mintex pads, I think its the material they are made of, it went when I put my crappy old ebc pads back in

 

Dave.

 

Steve : yeah have cooperslipped everything

Defo not my wallet opening or the wheel touching the caliper Yes if the car is jacked up and both wheels off the ground (cant spin 1 wheel cos of the LSD ) can hear the squeak noise.

Adam, i did consider changing the pads but the squeak is ONLY when NOT braking i.e the noise goes away as soon as the pad is pressed onto the disc and only re-appears when the brake pedal hasnt been pressed for 30+ seconds of driving

I did remove the pads and take the surface off with bit of emery cloth and chamfered the edges of the pads but it made no difference at all, soon as i drove down the road the noise was still there

I think i got a set of EBC green pads (yukkk) in the shed so i might try throwning these on the car and see if the noise goes. But i cant understand why the disc is touching the pad and making this noise in the 1st place and why its worse when turning left and noise disapears when turning right

 

have ya tried oiling the discs and pads

 

No havent tried that yet, i'll pop out there now and try it and let you know in 10 mins if its made it any better

 

only use synthetic oil though as mineral based or hydro cracked oils will break down quckly and in under 2k miles ya will have to re oil the pads again

use mobil one and ya wont ever hear a squeek from the car again,

ill even buy the engine off ya when ya drive it into a tree on the first test drive

 

oh i was gonna use light gun oil on the pads and discs, will that be ok?

PMSL, ok the engines yours for £3k and you get a free wrecked RST and a nice oak tree for a coffee table

 

Does it have a tin plate behind the disc? Is this touching/very close to the disc?

 

Theres no tin plate behind the disc and nothing is touching except the disc is touching the pad

 

Which way are the grooves in the discs running?

 

Tim cutting into the pad as disc rotates

 

BTTT

 

Found the solution to the noise.

Replaced the Pads (mintex1144) with a spare set of EBC Greens i kept in the shed, and noise gone. Think i may have cooked them on track and caused the whole pad material to become hardened and just where the disc kissed the pad when turning was causing the high pitched squeaking

Only got 800 miles out of this set of pads and they are 3/4 worn Who said track days are hard on brakes?

Anyone know what is the maxium temperature for mintex 1144's is ???

 

Judging by the caining they had, mucho less than what you got them too

 

 

According to the spec they are stable to 450 ºc so i guess they got hotter than that

Adam .......... ............... ...................

 

Another set of brakes for you then m8

 

Thats why I run 1177s

 

i have mintex 1144s in mine and they squeel like a bitch.

gonna order some ds2500s or ds2000s

 

same problem with my 1144's

 

Did you use copper grease in the right places?

Alex

 

back of the pads you mean?

 

Only a new set of Pads

Ran thats exactly what im looking at as replacements. Im told that the pad material is softer than the mintex 1144's but will stop just as well and taker the heat.

Yeah mine were al cooperslipped in the right places but made no difference, the noise was the pad touching the disc

 

Not just the backs...

The sliders... carrier pins... contact points....


Alex

 

Yep all of that was cooperslipped

I read that the maxium temp for mintex 1144's is 450ºc, is it possible that the temps get higher than that with a 200bhp 980kg RST on track?

 

yes but why would that cause sqeeking?

Over heating the pad causes..... PAD FADE more commonly called brake fade.

Alex

 

Dont really know Alex. The surface of the pad has dark areas on it and i cleaned them up with a bit of emery cloth and put them back on and the dark areas returned with in seconds of using the brakes along with the squeaking noise.

Maybe i should contact mintex and send them off to be looked at. The pad has also started hair line cracks in the center running from top to bottom.

p.s they never once faded around bedford, and at one point we did 16 laps without a cool down lap or a break to let the brakes cool off and they felt as good on the 1st lap as they did on the last lap of that run

 

andy ,.... i have some bad news for you i accidently recorded over your off at bedford ... sorry

 

Muhahahahahahahahaaaaaa that embarasing off is never to be seen EXCELLENT, just need to erase Tony's memory and then it never happened


Anyway how you been m8, long time no speak

 

what you mean that bit where you went off in a cloud of smoke


or i might just be winding you up ....

 

Hahaha cloud of white smoke .................. Prove it

 

as i know full well you actually want to see your smoke screen due to your lack of driving skill

....erm ... it will stay safe for a while

 

You dont have PROOF that A.) it was me driving and B.) was my RST that caused a small ammount of tyre smoke while trying to keep ahead of a porker ................

 

i do have proof .. it was you ..ya muppet

 

Dont believe ya, i cant remember any brake locking happening