Jump to content
SAU Community

Recommended Posts

hey all

i just got new pads and rotors.

DBA slotted rotors and bendix ultimate pads

had them in for 2 days and they are squeaking like a ****

any one have experience with these pads?

are they squeaky by nature?

cheers

dan

Yeh i had the same problem with ultimate pads the rears were fine it was just the fronts making a hell of a noise i took it back to the mechanic bout 3 times and they couldn fix it, they tried everything hey but still made noise so i took them off in the end and put on a cheaper pad that were a bit softer didnt have a problem after that, but the ultimates felt great while they were on there just a shame they were so noisy. I even rang bendix at the time and asked them for help and tried what they said to do but still no go. :)

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1563586
Share on other sites

hmmm, well that doesnt sound too promising..

well i called the mechanic and had a look over the rotors.

turns out i may have glazed the rotors by long, slow and light braking to stop at traffic lights etc causing them to glaze and squeal.

so i'm gonna go out tonight and see if i can lift that with some firm braking.. will report later!

dan

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1564260
Share on other sites

tried to wipe off the glaze with some hard braking, seemed to work for a while but came back...

its not a soft ee..eee.eee squeak, like when they need to be replaced,

actually it doesnt make that sort of noise at all, i wouldnt mind that noise as much. its more of a loud ear piercing EEEEEEEEEEEEEEEEP just before the car stops completely. apart from that theyre quiet!

its so loud and annoying it sounds like a old banged up truck!

is this normal?

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1564953
Share on other sites

Mine does the same thing..

Start of this year I had my 4000 series rotors machined, and new ultimate pads installed. After about 200km's they started squeeling. Took them back to brake place who did the machining and see what they could do, they tried other pads and still squeeked. Went back several times and never got totally fixed. I put up with the noise for a while then I went out and got a set of new rotors and RB74 pads. Bed them in as told and they do slighty squeel when just coming to a stop. I just live with it now :unsure: weird thing.

The rotors I had machined earlier this year, when new I installed them in my car with new ultimate pads in late 2003 and did a track day with them 2 days after putting them in..never ever squeeled or squeeked and stopped fantasticly. My only qualm was the high amount of brake dust..

Cheers

Jono

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1566321
Share on other sites

GTR032

so what your saying is the ultimates basically need a few laps of a track to bed properly then theyre quiet after that?

mine still squeak, they stop fantastically and lock up nicely but yeh its just that final 1m of stopping that they let out an almighty scream thats driving me nuts!

dan

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1566560
Share on other sites

GTR032

so what your saying is the ultimates basically need a few laps of a track to bed properly then theyre quiet after that?

mine still squeak, they stop fantastically and lock up nicely but yeh its just that final 1m of stopping that they let out an almighty scream thats driving me nuts!

dan

Well i dont know for sure but its the only difference between when i changed discs n pads both times..

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1566640
Share on other sites

I had ultimates on my r32, they squeaked quite a bit. After I put in my RDa rotors they stopped squeaking. They used to squeak under light braking, ok under heavy braking. I think that bedding them in properly helped.

The rda rotors had a bedding in guide, e.g. high performance pads - 3 sets of 10 of medium braking from 80 km/hr to 20 km/hr with a cool down period in between each set. This deposits a layer of pad material onto the rotor assisting braking. They also said that if you drive around a lot doing only light braking that this layer gets removed and you need to do the bedding in again.

here is the tech doc...quite interesting

Technical Bulletin – 2004/5 – #5

Rotors & Drums Australia Pty Ltd

EBC Brakes Australia Pty Ltd

BEDDING IN OF PADS AND ROTORS

When a vehicle has had both new rotors and new pads fitted there are two processes or objectives to

getting the brake system to operate at optimal performance.

Step 1 is heating the brake rotor and pads to transfer the pad material evenly onto the rotor face.

Step 2 is maturing or cooking the pad to ensure that gasses are burnt out of the pad material and that

resins in the pad material bind together.

Step 1 & 2 involves performing a series of stops, so that the brake rotor and pad are heated steadily, to

allow the transfer of pad material onto the brake rotor friction surface. The friction surface should be

clear of all oils which are used to stop the rotor from rusting before being fitted to the motor vehicle.

Whilst these will be burnt off, they risk transferring and possibly polluting the brake pad material and

will definitely lead to a longer bedding in process. Whilst performing a series of brake applications to

transfer the pad material, care should be taken to not come to a complete stop, as this can lead to the

transfer of pad material unevenly on the disc at the point where the pad comes to rest on the friction

surface.

A typical program of ten brake applications from 80km down to 20km p/hour without any cool down in

between would be sufficient. If it is noticeable that after 5-6 applications that the performance drops

away, this means the resins and gasses have yet to be burnt or compressed, out of the pad material.

For performance pad materials, a further two sequences of ten stops will be required after a cooling

down period between each cycle, to ensure that the pads have reached the required higher operating

temperature to allow for the pad material to transfer effectively.

At all times during the bedding in process, care should be taken to not apply the brakes in a harsh

manner or decelerate from high speeds, as this will corrupt the transfer of materials and lead to uneven

material build up on the rotor surface, which in most instances will require machining to regain a flat

rotor surface for optimal operation (Disc thickness vibration-DTV-which leads to brake judder or

vibration-see RDA/EBC Bulletin #5).

How will I know if they are bedded in?

The two major visual indicators are disc rotor discoloration and machining marks on the friction surface

of the disc rotor.

1) Disc rotor should have a slight bluish tint with a grey tint that indicates where the brake pads have

come into contact with the rotor. Too much heat will cause the rotor face to be extremely blue and

has been overcooked in the bedding in process.

2) If there is still a shine on the rotor surface, then not enough pad material, has been transferred.

Once brakes have been bedded in, it is also important, to keep them that way. If any brake pad is used

below its adherent operating temperature over a period of time it will slowly remove the transfer layer

on the rotor surface. Standard and especially performance pads like to be driven a little more

aggressively every now and then to maintain this pad material on the rotor friction surface. Similar in

effect to taking a city based car on a country run every now and then and noticing the change in the

exhaust tail pipe color, go from black to grey as it operates at a different temperature, to what it has

become accustomed. Passive use of brakes over an extended period of time will in effect lead to

“unbedded brakes”.

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1567408
Share on other sites

I ran Ultimates with DBA rotors.

Never squeeled but I did give them a little more than the recommended bedding in procedure. Lots of repeated 100km/h stops, no time to cool inbetween. :huh:

One question.. Did the people who did the work remove the anti-squeel shims from the old pads and put them on the new?

When pads are dirty and dusty its easy to forget and simply throw them aside.

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1570110
Share on other sites

One question.. Did the people who did the work remove the anti-squeel shims from the old pads and put them on the new?

When pads are dirty and dusty its easy to forget and simply throw them aside.

I lost my shims. Can I just make my own aluminium sheet thing and use some sort of high temp glue to stick them on the pad to stop it from moving around in there?

Mine squeel like crazy, sometimes if I put the car into reverse a little and use the brakes I hear a click, as if the pad is resetting itself into the caliper. I assume this is half the problem.

I'm also hoping to fix the squeek I seem to get every 1 revolution from the rear brakes (I'm hoping it's not a warped rotor).

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1570581
Share on other sites

I don't think this is just an "Bendix Ultimates" issue.

I'm currently running Winmax pads with Zeal Straight Six rotors and they squeel like a stuck pig !! I got my hands on a full set of Nismo pads and they did exactly the same thing so I then went and got the discs machined to eliminate them as a cause and with both sets of pads ( around 100km use on the machined discs with each set of pads ) I still got the squeeling problem.

I then pulled the calipers & disc rotors off, swapped the direction of the rotors, cleaned the pad running area of the calipers, cleaned the shims and cleaned the pads ( including roughing the pad friction area ) and guess what :) It still squeels !! :blink:

I'm now going to pull it all apart again and try some copper grease in all the suspect areas. After that, I'm out of ideas.

One thing I will say ( I'm not saying this is the answer ) is that when I had the EBC Greenstuff pads and EBC Turbogroove rotors fitted I never got any noise and almost no dust !!

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1570677
Share on other sites

Everyone complaining of squeeling brakes, did you bed the pads in when you fitted them? If you changed rotors, did you bed them in again then?

Ive got RB74 up front, after bedding them in they havent squeeled since, until i had my rotors changed. After doing the bedding in proceedure again all was fine.

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1570842
Share on other sites

Everyone complaining of squeeling brakes, did you bed the pads in when you fitted them? If you changed rotors, did you bed them in again then?

Ive got RB74 up front, after bedding them in they havent squeeled since, until i had my rotors changed. After doing the bedding in proceedure again all was fine.

I tried doing the bedding in last night ( 10 times from 80 to 20 ) but it didn't seem to fix the problem for long so I'll have to try the version for race pads and see how that goes. In the past, I've mostly did my "bedding in" on the track. Will post results. Cheers. :D

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1572751
Share on other sites

i have tried doing the 1 set of 10 stops 80-20

-didnt work

i have tried doing the 3 sets of 10 stops 80-20

- didn't work either.

now almost a week after getting the brakes installed the squeeking is unbarable and i'm having another mechanic have a look at them today...

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1572831
Share on other sites

Track days always fix my squealing. I have lost my rear shims though. I tried putting two thicknesses of aluminium can in there instead but that didn't work.

My rears have been squealing for ages now but I've had no track days for ages either. Tomorrow I will pull the pads out, lightly sand them to deglaze them, then put them back in and bed them good and proper. Sunday I'm going to the track.

I will report back on monday.

Link to comment
https://www.sau.com.au/forums/topic/86507-squeaky-brakes/#findComment-1572989
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Well, that's kinda the point. The calipers might interfere with the inside of the barrels 16" rims are only about 14" inside the barrels, which is ~350mm, and 334mm rotors only leave about 8mm outboard for the caliper before you get to 350, And.... that;s not gunna be enough. If the rims have a larger ID than that, you might sneak it in. I'd be putting a measuring stick inside the wheel and eyeballing the extra required for the caliper outboard of the rotor before committing to bolting it all on.
    • OK, so again it has been a bit of a break but it was around researching what had been done since I didn't have access to Neil's records and not everything is obvious without pulling stuff apart. Happily the guy who assembled the engine had kept reasonable records, so we now know the final spec is: Bottom end: Standard block and crank Ross 86.5mm forgies, 9:1 compression Spool forged rods Standard main bolts Oil pump Spool billet gears in standard housing Aeroflow extended and baffled sump Head Freshly rebuilt standard head with new 80lb valve springs Mild porting/port match Head oil feed restrictor VCT disabled Tighe 805C reground cams (255 duration, 8.93 lift)  Adjustable cam gears on inlet/exhaust Standard head bolts, gasket not confirmed but assumed MLS External 555cc Nismo injectors Z32 AFM Bosch 023 Intank fuel pump Garret 2871 (factory housings and manifold) Hypertune FFP plenum with standard throttle   Time to book in a trip to Unigroup
    • I forgot about my shiny new plates!
    • Well, apparently they do fit, however this wont be a problem if not because the car will be stationary while i do the suspension work. I was just going to use the 16's to roll the old girl around if I needed to. I just need to get the E90 back on the road first. Yes! I'm a believer! 🙌 So, I contacted them because the site kinda sucks and I was really confused about what I'd need. They put together a package for me and because I was spraying all the seat surfaces and not doing spot fixes I decided not to send them a headrest to colour match, I just used their colour on file (and it was spot on).  I got some heavy duty cleaner, 1L of colour, a small bottle of dye hardener and a small bottle of the dye top coat. I also got a spray gun as I needed a larger nozzle than the gun I had and it was only $40 extra. From memory the total was ~$450 ish. Its not cheap but the result is awesome. They did add repair bits and pieces to the quote originally and the cost came down significantly when I said I didn't need any repair products. I did it over a weekend. The only issues I had were my own; I forgot to mix the hardener into the dye two coats but I had enough dye for 2 more coats with the hardener. I also just used up all the dye because why not and i rushed the last coat which gave me some runs. Thankfully the runs are under the headrests. The gun pattern wasn't great, very round and would have been better if it was a line. It made it a little tricky to get consistent coverage and I think having done the extra coats probably helped conceal any coverage issues. I contacted them again a few months later so I could get our X5 done (who the f**k thought white leather was a good idea for a family car?!) and they said they had some training to do in Sydney and I could get a reduced rate on the leather fix in the X5 if I let them demo their product on our car. So I agreed. When I took Bec in the E39 to pick it up, I showed them the job I'd done in my car and they were all (students included) really impressed. Note that they said the runs I created could be fixed easily at the time with a brush or an air compressor gun. So, now with the two cars done I can absolutely recommend Colourlock.  I'll take pics of both interiors and create a new thread.
    • Power is fed to the ECU when the ignition switch is switched to IGN, at terminal 58. That same wire also connects to the ECCS relay to provide both the coil power and the contact side. When the ECU sees power at 58 it switches 16 to earth, which pulls the ECCS relay on, which feeds main power into the ECU and also to a bunch of other things. None of this is directly involved in the fuel pump - it just has to happen first. The ECU will pull terminal 18 to earth when it wants the fuel pump to run. This allows the fuel pump relay to pull in, which switches power on into the rest of the fuel pump control equipment. The fuel pump control regulator is controlled from terminal 104 on the ECU and is switched high or low depending on whether the ECU thinks the pump needs to run high or low. (I don't know which way around that is, and it really doesn't matter right now). The fuel pump control reg is really just a resistor that controls how the power through the pump goes to earth. Either straight to earth, or via the resistor. This part doesn't matter much to us today. The power to the fuel pump relay comes from one of the switched wires from the IGN switch and fusebox that is not shown off to the left of this page. That power runs the fuel pump relay coil and a number of other engine peripherals. Those peripherals don't really matter. All that matters is that there should be power available at the relay when the key is in the right position. At least - I think it's switched. If it's not switched, then power will be there all the time. Either way, if you don't have power there when you need it (ie, key on) then it won't work. The input-output switching side of the relay gains its power from a line similar (but not the same as) the one that feeds the ECU. SO I presume that is switched. Again, if there is not power there when you need it, then you have to look upstream. And... the upshot of all that? There is no "ground" at the fuel pump relay. Where you say: and say that pin 1 Black/Pink is ground, that is not true. The ECU trigger is AF73, is black/pink, and is the "ground". When the ECU says it is. The Blue/White wire is the "constant" 12V to power the relay's coil. And when I say "constant", I mean it may well only be on when the key is on. As I said above. So, when the ECU says not to be running the pump (which is any time after about 3s of switching on, with no crank signal or engine speed yet), then you should see 12V at both 1 and 2. Because the 12V will be all the way up to the ECU terminal 18, waiting to be switched to ground. When the ECU switches the fuel pump on, then AF73 should go to ~0V, having been switched to ground and the voltage drop now occurring over the relay coil. 3 & 5 are easy. 5 is the other "constant" 12V, that may or may not be constant but will very much want to be there when the key is on. Same as above. 3 goes to the pump. There should never be 12V visible at 3 unless the relay is pulled in. As to where the immobiliser might have been spliced into all this.... It will either have to be on wire AF70 or AF71, whichever is most accessible near the alarm. Given that all those wires run from the engine bay fusebox or the ECU, via the driver's area to the rear of the car, it could really be either. AF70 will be the same colour from the appropriate fuse all the way to the pump. If it has been cut and is dangling, you should be able to see that  in that area somewhere. Same with AF71.   You really should be able to force the pump to run. Just jump 12V onto AF72 and it should go. That will prove that the pump itself is willing to go along with you when you sort out the upstream. You really should be able to force the fuel pump relay on. Just short AF73 to earth when the key is on. If the pump runs, then the relay is fine, and all the power up to both inputs on the relay is fine. If it doesn't run (and given that you checked the relay itself actually works) then one or both of AF70 and AF71 are not bringing power to the game.
×
×
  • Create New...