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brakes squeak at low speed braking

9.4K views 30 replies 15 participants last post by  lotusquacious  
#1 ·
I have only 3000 miles on my 2011 Evora NA. When i brake at low speed they squeak and at high speeds the is slight vibration in the steering when braking. any thoughts?
 
#2 ·
Squeak/squeal yes. Normal. Hitting the brake real hard once in a while helps. Nature of them. Brake later in your stop.
Vibration, no, not on mine. Feedback, but I wouldn't call it vibration.
 
#5 ·
re: Brake Squeel

All disk brakes squeel. Some more than others. There are many cures:

1. Anti squeel compound... messy.
2. Anti-squeel shims.
3. Braking harder or more often to heat up the pads and polish them a bit.
4. Braking harder while reversing (i.e. press gas and brake at the same time). Again may take some varnish off the pads.
5. Harder compunds will squeel louder than soft ones. All compounds soften with temperature. Hence the brake warming trick. Either drive with one ffot on brake and one on gfas for 2 to 3 mins or fins an empty place and make 5 stops from 40 to 60 mph in a row....

Good Luck! I run race compounds on my daily driver M3. They squeel like stuck pigs when cold.

Anton
 
#6 ·
Unless you are occasionally standing on the brakes for aggressive stopping from say 75+ mph, the pads are just glazing. You need to heat those pads up and burn off the glaze. That will get rid of your squealing.Its a sports car. Don't drive it like a Prius!
 
#9 ·
Mine squeaks a lot....when the brake is full of dust :)
Brought it to Brown Bear today and washed it clean, now it doesn't squeak. Although yes it still squeaks from time to time, and I was told that it's normal because of the racing pads.
 
#10 ·
You will not warp these rotors. What you will do is get substrate buildup from a pad contacting a rotor, say being parked after a wash etc and then not being "cleaned" off properly. Happens every time rotors get wet.
 
#11 ·
#16 ·
Easier to replace than to resurface and they get to charge Porsche more also. Dealers love to hose the manufacturer
 
#17 ·
Porsche (as in the factory) doesn't believe in turning cross-drilled rotors. They just toss 'em out and replace. IIRC it has to do with an inconsistency in thickness.
 
#18 ·
Turning to me , is heavy duty, I meant that 1/1000th to clean them up.
 
#21 ·
Do it several times and personally a nice 100+ to 20 will really do the trick nicely. You might be shocked how the brakes bite after you do that!! Burns all the nasty crap off! I have a favorite exit ramp I come into at 75-80 at least once a week. Its downhill with a hard left at the bottom. Needless to say waiting till ~200 ft is all that is needed! Threshold braking is typically the single biggest weakness in street driver's esp in the age of ABS. BTW have you tried to find ABS yet?
 
#22 ·
This all makes a lot of sense and, of course, I was aware of the fact that brake pads can glaze up. What I wasn't aware was how it can throw the entire setup out of kilter. I live in a densely populated area of Florida where stop and go driving is a fact of life. That kind of driving has probably been my undoing all these years. First chance I get, I'm gonna take the b**** out for a hard ride and deglaze the bad boys.

Thanks for the advice, guys.
 
#23 ·
She'll thank you for it! She likes being ridden hard!!!
 
#24 ·
Funny thing. I wanna drive this car hard, and I know I should, but I've got a mental block from all the stuff I've read on this forum about this and that, even though it's mainly to do with foo foo stuff. I'm babying this car too much.

Now watch me go get two tickets in the next week.:facepalm
 
#25 ·
I have plenty of complaints about foo foo stuff but that doesn't stop me from putting the pedal down and making it go sideways every once in a while. The car is too much fun not to keep your foot in it, finding a safe appropriate place is always the difficult part.
 
#26 ·
You won't get tickets for late braking and its even more fun than just squeezing a gas pedal!!
 
#27 ·
drive the **** out of it. I'm telling you, it shifts better, stops better, accelerates better the more you push it. If there is one thing I've learned about this car over the last 17k miles, is it likes to be pushed, not driven easily.
 
#28 ·
I find she likes it both ways but is very happy when she gets throttled!
 
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#29 ·
Hey Folks,

2010 Evora, not as mechanically knowledgeable as most on here but I'm loving every minute of learning about this car.
Not tracked but driven hard
Fair weather driven only (because Canada)

I have a similar issue but with 50,000km (31K miles) on it. Pretty loud low speed squeal even after they've been heated up. No vibration. Difficult to narrow down which area it's coming from though but am going to do some parking lot laps with my head out the window to figure it out (and enjoy look stupid). All stock still on there, I'm just unsure of how to troubleshoot it.

Could this be a real deal replacement at this many KMs? Difficult to source parts outside of dealerships in the great white north as well.

I'm getting a buddy to to lend me his jack & stands (recent thread shows thats a project in & of itself)

So with limited resources and options, how would you go about figuring this out?:scratchhead:
 
#30 ·
If you've had no other issues before, the first thing I'd check is the pad thickness for wear. (Everyone drives different, so pads wear at different intervals for different cars/ drivers.)

Standard pad thickness (excluding backplate); 12.0 mm
Minimum pad thickness (excluding backplate); 2.5 mm
 
#31 ·
What you are trying to do is wear the pad buildup off the disc.

Why do they squeal (and feel grabby) and even more so when wet? Just my theory but I think water acts as an imperfect lubricant and you get the same effect as running your hand across the top of a glass that has been lightly moistened; vibes you hear and feel through the controls.

My Ducati's Brembos are fussy about this. Working a 3M pad or higher grit (say 220 or 320) sandpaper around the rim will sometimes work to reduce the noise but ultimately pad material will attach to the disc again and I'm back where I started, sometimes within the space of just a few miles. As has been said, a few hard stops will temporarily reduce or eliminate the effect. When the discs have built up pad material, as they seem to around town, I find that the noise is most obvious towards the end of a stop when I'm easing up on the brake pressure.

My Evora doesn't elicit these symptoms, but my Ducatis all seem to and will clean up with a bit of hard scrubbing but will come back again in short order. I'm still on the original pads on my Multistrada so not much has changed but my riding buddies tell me that a change in pad material will often result in a change in the squeak quotient.

That said, squealing is often an indicator of pad wear and many street pads are intentionally fitted with an element that will cause them to squeal once the pads are worn past a certain point.