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Old 12-24-2013, 03:43 PM   #1
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Why are my brakes leaking?..update.

Ok so the bleeder valve isn't loose.This happens after most track sessions.This has happened 3 times on the drivers side,and once on the passenger side.I went to the dealer,and my service manager seems to think that im getting my brakes so hot that the bleeder valve distorts just a hair,and the fluid comes out under immense pressure.Now i am brutal on my brakes,i brake late and hard,and i know my brakes are freaking hot.My dealer is one of the good ones,and he told me to set up my GoPro inside the wheel well,he wants to see how red my rotor is getting.He wants to send the video to GM and say what are we going to do about this.He even says the 1LE is marketed as "A TRACK READY CAR" so any informed brake guys know whats going on here?


Ok,so lots of great info on this issue. I talked to my dealer,and he talked with GM and sent them this picture,long story short. They ordered me new calipers,and GM wants these back,so they seem to be taking this seriously.
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Old 12-24-2013, 04:01 PM   #2
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Not buying that theory. Brembo has been in the brake business forever with a huge racing history. I can confidently say you're not getting substantially more heat in your brakes than any other Camaro on a track day (unless you're running R-comps or slicks?).

Since the calipers have been powder coated, that's where I'd start.

Is that a picture of the actual leak? Is the other caliper that leaks a rear as well? Where does the fluid appear to be coming from (bleeder screws or the crossover tube)? Was there any powder coat in any of the threads?
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Old 12-24-2013, 04:51 PM   #3
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Quote:
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Not buying that theory. Brembo has been in the brake business forever with a huge racing history. I can confidently say you're not getting substantially more heat in your brakes than any other Camaro on a track day (unless you're running R-comps or slicks?).

Since the calipers have been powder coated, that's where I'd start.

Is that a picture of the actual leak? Is the other caliper that leaks a rear as well? Where does the fluid appear to be coming from (bleeder screws or the crossover tube)? Was there any powder coat in any of the threads?
These are the stock 1LE brakes,so i couldn't imagine there is any powder coating in there.No i am completely stock tires etc.except stainless lines and Motul 600.This pic is of the passanger side,this is the first time i saw this.The other 3 times have been on the drivers side.It is coming from the bottom of the bleeder screw where it screws in to the caliper.There is no leak from the rears.
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Old 12-24-2013, 05:01 PM   #4
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Replace the bleeders and tape the threads.
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Old 12-24-2013, 05:03 PM   #5
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That's really strange. I'd inspect the threads and bleeder screws. The easiest thing to do is replace the bleeder screws and see if that does it.

You have to be careful not to over tighten the bleeders. I take it it doesn't feel like there's any cross threading at all?
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Old 12-24-2013, 05:17 PM   #6
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They're all like this or at least all of mine were too. Coarse threads and poor tolerances. All he needs is thread tape. Done.
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Old 12-24-2013, 05:24 PM   #7
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What kind of tape? i couldn't imagine just regular Teflon tape with the kinda heat there.
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Old 12-24-2013, 05:25 PM   #8
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That's really strange. I'd inspect the threads and bleeder screws. The easiest thing to do is replace the bleeder screws and see if that does it.

You have to be careful not to over tighten the bleeders. I take it it doesn't feel like there's any cross threading at all?
The bleeder screws have never been out,so i couldn't have crossed threads,right?
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Old 12-24-2013, 05:30 PM   #9
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Thats all it takes. You can buy high temp thread sealant if you really want to.

Take them out 3 turns and then feel how much wobble is in the bolt. Spoiler alert: a lot. The tolerances stink.
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Old 12-24-2013, 05:31 PM   #10
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Originally Posted by cornerspeed92 View Post
The bleeder screws have never been out,so i couldn't have crossed threads,right?
The factory loves cross threading things but usually its the oil cooler. This is 99.999% a crap tolerance like all of them have due to coarse threads.
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Old 12-24-2013, 05:40 PM   #11
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And tape is 550 degree temp
http://www.amazon.com/LA-CO-Slic-Tit...thread+sealant

High temp thread sealant is only 400 degree...
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Old 12-24-2013, 05:41 PM   #12
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Thanks gentlemen.,will i need to re bleed them after?
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Old 12-24-2013, 05:46 PM   #13
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Yes. Backing it out enough to get tape on them will introduce air.

Buy a vacuum bleeder that hooks up to an air compressor if you don't already have one. Best money I ever spent.
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Old 12-24-2013, 05:47 PM   #14
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Quote:
Originally Posted by cornerspeed92 View Post
The bleeder screws have never been out,so i couldn't have crossed threads,right?
You can screw the threads up by over tightening the bleed screw.

Personally, I wouldn't tape them. They shouldn't need tape. I've never had a problem with ANY bleeder screw leaking, and they will feel sloppy loose.

If they were overtightened, it's possible the bleed screws could have small cracks. I'd replace the bleed screws first then go from there.


And no, as long as you don't touch the brake pedal, you shouldn't have to bleed the brakes. The surface tension of the brake fluid will prevent air from getting in the system.
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Old 12-24-2013, 05:58 PM   #15
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I never had an issue with any either on any other car ever. Every track day they leaked on this car. Tape=fixed. You're over complicating it.

A couple turns and they wobble a lot, more than any bolt should due to the thread size. Add heat to the caliper when they're tight and the tension seal is no longer there so they weep. Add tape and it stays sealed. Done.
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Old 12-24-2013, 07:14 PM   #16
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Well, the threads don't make the seal, the taper at the end of the screw does. If the threads are damaged, you may not get a good seal at the taper.

Either way, I don't see anything unusual about the slop of the bleed screws considering the thread pitch. Brembo isn't some fly-by-night company; these brakes are well engineered and don't come with Teflon tape.

Personally I wouldn't want to risk introducing teflon tape into my brake system. First I'd replace the bleed screws. If that didn't work, I'd get the calipers warrantied. No band-aid fixes when it comes to the brakes for me...
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Old 12-24-2013, 08:07 PM   #17
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Are the insides of the rubber bleeder caps wet when you inspect them after this occurs?

It seems odd the leak would occur at the bleeder junction with the caliper and not at the rubber cap.
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Old 12-24-2013, 08:23 PM   #18
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Quote:
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Well, the threads don't make the seal, the taper at the end of the screw does. If the threads are damaged, you may not get a good seal at the taper.

Either way, I don't see anything unusual about the slop of the bleed screws considering the thread pitch. Brembo isn't some fly-by-night company; these brakes are well engineered and don't come with Teflon tape.

Personally I wouldn't want to risk introducing teflon tape into my brake system. First I'd replace the bleed screws. If that didn't work, I'd get the calipers warrantied. No band-aid fixes when it comes to the brakes for me...
There is a lot of good info here,but i would have to agree,with a warranty issue.I am going to do the GoPro the next track day,since thats what my service manager said.Im also going to get new bleeder screws,and see what happens.

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Are the insides of the rubber bleeder caps wet when you inspect them after this occurs?
This i didn't do,so no idea.

It seems odd the leak would occur at the bleeder junction with the caliper and not at the rubber cap.
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Old 12-24-2013, 09:09 PM   #19
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Video will not tell you the temp your brakes reach or anything about what the issue is inside the caliper. It will be handing GM proof of tracking your car in case they want to be dicks and feel like voiding the warranty.

Buy temp strips or an IR gun if you want the temp. Although tracking your car with an ongoing brake leak you don't know the root cause of is another issue entirely.
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Old 12-24-2013, 09:32 PM   #20
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Video will not tell you the temp your brakes reach or anything about what the issue is inside the caliper. It will be handing GM proof of tracking your car in case they want to be dicks and feel like voiding the warranty.

Buy temp strips or an IR gun if you want the temp. Although tracking your car with an ongoing brake leak you don't know the root cause of is another issue entirely.
I totally agree,but with the video of Al saying this is "a track car"and my service manager saying "this is marketed as a track car"how can they weasel themselves out of what they made?
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Old 12-24-2013, 09:38 PM   #21
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Dealer=weasel
Al's statement have no basis in law or warranty claims. And the warranty on the car can be voided for track use. They specifically add those clauses to it. Even if your dealer is cool upchanneling this to GM means his opinion no longer matters once a warranty decision has been made.
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Old 12-24-2013, 09:41 PM   #22
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The New Vehicle Limited Warranty does not cover damage caused as the result of any of the following:
-Collision, fire, theft, freezing, vandalism, riot, explosion,
or objects striking the vehicle.
-Misuse of the vehicle such as driving over curbs, overloading, racing, or other competition.
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Old 12-24-2013, 09:45 PM   #23
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Some people will argue that a track day is not a race but in reality it comes down to how much of a prick the warranty claim decision maker is.
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Old 12-25-2013, 09:10 AM   #24
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Do not use thread sealants in your brake system!!!!!!!!!
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Old 12-25-2013, 09:27 AM   #25
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Rockrau is correct. Don't use thread sealant in on the brake system. If even a tiny bit gets into the lines, it could mess up a lot of things,

The minor bit of leakage is normal after a track session. The brake fluid is boiling and seeping out of the threads. I wipe down the calipers after a track day and it never leaks out during normal street driving.
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