RKD in OKC

Okay so I have EBC Yellow pads. They are a "streetable track pad." Breaking them in took 200 miles with lots of squealing. However they did quite down and it has been over a year.

Well, they started squealing once in a while under light braking, slowly getting more frequent. After sitting for a couple of months and getting washed 3 times without much driving (and no driving in anger that I know of) at Sean's doing the cam job, they squeal like crazy and under ANY light braking.

After doing some searching I found the most common solution was to remove the pads scuff them up to remove any glazing and bevel the front edge. But, that after that procedure the squealing would come back.

What i did was, re-do the break-in procedure. Took the car to 60 and hit the brakes hard down to 10 mph, a couple times, then held the brakes on hard but keeping the car at 40 with throttle for about a mile to get them good and hot. Then cruised a couple miles without using the brakes to let them cool. Not a peep the rest of the way home!

Texbuckeye

Please post an update to see if this works long term. Mine squeal too.

RKD in OKC

500 Mile update.

It's been 500 miles and the squeal has not returned yet.

Randy V

Do you apply the brakes at full force until anti-lock engages?

Texbuckeye

Thank you for the update, keep posting,
Brad

RKD in OKC

Not that hard, just enough I can maintain 40 mph with throttle to heat them up really really good. This idea is that I burned off the glazing that got there presumably from limo driver style easing into the brakes around town.

Randy V

I was referring to the 60 to zero stops.

auzivision

I'll have to give this a try... at the Parade of Porsches it was almost getting to be embarrassing... never used my brakes that much before.

Most of the time I don't use brakes much... find them to be a waste of time and energy.

NoVector

^^^ Mine used to be that way; horrible--especially in town. I tried the re-bedding but it didn't work. Finally, i couldn't take it anymore and got the brake damper pads from Roger and not a peep since then. Although, not cheap--around $90 for the rear and $50 for the front. No regrets.

MFranke

I had this issue for a long time on my 88 and tried various break-in methods, skimming the rotors, anti squeal compounds etc. New pads, old pads, clean brakes, dirty brakes, new rotors - it didn't matter. The noise might stop briefly but would return within weeks. Maybe new pads would give me a few months respite. Then it would return. Horrible very loud sound when coming to a stop.

Finally I realized there were supposed to be dampers in the cylinders. Over a year ago I installed the Porsche vibration dampers that had been missing from the cylinders. This cured the problem! Now I have quiet brakes ever since. Well worth the money. I'd email Roger and order some if you have this problem and you will be glad you did.

My other one, the 87, still had the dampers when I got it. I put new pads in and re-used the dampers. The brakes are quiet on it too.

blained

I just got fresh front pads and the 'mushroom' vibration dampers, and was wondering what the proper method for installing them is, since I've always had the generic sticker-like dampers in the past. My working assumption right now is to insert them in the piston, after peeling the paper off the sticky side, then insert the pads and press against the sticky side. Is that the correct way, or is there another method involving sticking them to the pads before inserting into the calipers (that seems like it would be pretty hard to get right)?

ammonman

You had it right the first time. Insert dampers into pistons, remove backing (helps to start one edge of the backing before putting them into the pistons), then insert pads into calipers and firmly press onto dampers. I had one damper that insisted on popping out of the piston after a few seconds but it wasn't any problem.

Mike

NoVector

Pistons retracted, I put the dampers in the pistons WITH the sticky tape still applied and then dropped the pads in the caliper to make sure they fit okay. Then, I removed the pads and peeled the paper off the dampers. Then dropped the pads back in and after checking the brake fluid, pumped the pedal a few times. FWIW, I also ruffed up the back of the pads with sandpaper and cleaned them before dropping them in to make sure they had good adhesion with the dampers.

blained

The dampers I have are configured more like circular lamprey teeth than mushrooms, and I'm having a hell of a time getting them into the pistons. Any particular tricks? Did you do it with the calipers in place or did you go through the process of removing them?

blained

For instance, if you look at the dampers shown here on Pelican Parts, the ones I have look like the teeth are mounted upside down, i.e. poking OUT rather than towards the damper:
http://www.pelicanparts.com/catalog/...pg4.htm#item11