Brake squeal ?

[PHASEONE]

Has anyone got any ideas on , a : what is causing my n/s front brake to squeal like a stuck pig when braking gently or , b : How to stop it ? . I have a Stagea with a R33 GTST 4 pot caliper conversion which was on the car when I bought it , since then I have fitted new pads , fitted a new caliper checked that nothing is caught in the back plate & that the plate is not rubbing , before I go and buy a pair of front discs not that there is any sign of wear on the ones on the car I thought I would ask .
cheers
Alan

[dazzler22]

I have the same Problem on my R33 GTSt, I have just stripped down the front breaks and copper slipped the back of the pads and the anti squeel pads on the back of them and it hasent made an ounce of difference...... im now wondering if it is the fronts at all!

so next weekend the back is getting new pads and a good copper slipping! and if that dont get it im gonna drive with my shotgun ear defenders on!

Cheers
Dazzler

[ru']

? Brake squeal ? ?

[dazzler22]

will be watching the other thread too then!

ru' on the other thread you asked if the disk had a slight lip on it, mine does... so it this new disks time?

Cheers
Dazzler

[ru']

lol, thread confusion. If the disk thickness is still in-spec then the lip could be machined off I guess.

[PHASEONE]

The disc on mine are like new, no lip at all ?

[frostmotorsport]

get slotted discs. and you may have to experiment with pad compounds.... = $$$$$$$$$$$

[PHASEONE]

Trouble is some threads show that this is happening even with the slotted discs to some people ?

[DeanN]

I have had a lot of experience with servicing cars and squealing brakes and I still don't know the cause of each and every case.

You wouldn't believe how many complex circumstances can cause squealing brakes. I know I've researched it !

Discs get hardened deposits of brake compound that must be cleaned off, discs change composition ( something called cementite, I think ), poorly bedded in pads, sticky caliper pistons, the list goes on and it's not always easy to diagnose or cure.

I've tried anti squeal shims in the past, but with the "problem" squealers it has never worked.

Copper grease on back and edge of pad has had some success.

Filing an edge all round the pad has been sort of successful, especially when combined with cleaning off the thick and excessive paint often found on the edge of the pads where they are held in the caliper.

If it's really doing your head in, here's what I would do....

Remove pads, sand up, file edge on if not already, sand up discs, make absolutely sure that pistons are nice n free in caliper, copper grease on back. Bed in by building up firm braking to a stop, but don't get them too hot or hold the pedal down so that the pads are held in contact with the discs when hot. Also consider changing to another set of pads.

Can't think of anything else, but it's not helping that I've been on the Fosters all afternoon

BTW, you can't see the deposits and or hardened areas on a disc, there are places on the net that give more details on this if you search

[PHASEONE]

Cheers for that when I return from the Holiday I will sort it out as its come to the point when I just dont use the car because of the noise

[r33line]

i hade the same problim with my R33 GTR ended up putting EBC turbo disc on it and the EBC yellow stuff and hay presto no squeal. hope this helps.

[SWboost]

I had the same problem on my R34, & subsequently nearly qualified for an MBA in Brake diagnostics by the time I was done. Seriously though I installed some slotted rotors & standard manufactures pads. Finally that bloody heart wrenching, wolf beckoning, high pitched what the hell are you looking at squeal has retired itself back to hell!! No matter how smooth the standard rotors look trust me they are probably ever so slightly warped. You will find the slots pull you up like a RBT anyway so its kinda worth it. Put ya other dream of 20"rims on the back burner for a few months champ!!.