ITS Squealing brakes both on and off the pedal

[Coolyellowcar]

I’m currently spending a few days at the tail of the dragon, in my type s. It’s been doing good as ever on the roads, but I have noticed something a bit odd while driving around with the windows down. The car seems to make a high pitched, metal on metal, sound that is coming from either the front right or rear right brake. It seems to stop if I apply a good bit of pressure to the pedal; however, the squeal seems to linger for a half second of so with light pedal pressure. It also sees to make some of these high pitched noises while just leisurely driving through the mountains, regardless of wheel direction.

What I am confused about is that nothing on the car looks odd. I just had the brake pads on another car of mine wear down to the metal, making a horrible sound, and so I immediately checked the brake pads. The fronts have more than enough life, and the rears are a little close to being done (Car is at 17.5k miles and I know the vsa eats the pads), but there is no discoloration of metal on metal contact streaks on the outside of the rotor.

I’m planning on replacing all the pads when I get home, just out of safety, but I’m more just confused on the cause of such noise. I can get a video of the sound if needed, but it literally sounds like metal on metal squealing.

This is the car’s second dragon trip and it hasn’t ever been tracked, but I do drive it pretty hard while in the mountains (less than once a year), so I’m more at a loss of where to go, from here, than anything else.

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[s219]

Probably a rock caught between the brake rotor and shield on one of your front wheels. It happened to me all the time on my ITS -- the car seems especially prone to it. Sometimes it will resolve if you drive in reverse. Otherwise, if you wait long enough the rock will wear down and then get thrown out.

 

[elh0102]

I had a similar experience with my ITS last week. I noticed a high pitched sound that seemed to be related directly to the speed of the car. It did not sound like the same noise that I've heard before on other cars when a little stone was caught between the stone shield and rotor, but it was definitely related to the speed of the spinning rotor. Actually, it sounded more like a worn pad warning that comes from the little spring steel wear sensors that many cars use. I haven't even looked to see if this car uses them, but it was that kind of sound. Anyway, I stopped, shifted into reverse and backed up a few feet. The noise was gone. One of the mysteries of life.

 

[Coolyellowcar]

Probably a rock caught between the brake rotor and shield on one of your front wheels.

I was thinking that, but I have had rocks get caught in the shielding before and it sounds nowhere near the same. The squealing from the rocks are usually lower pitched and inconsistent, but this sound is higher pitched and more of a consistent sound. It’s also been doing this for the course of like 500 miles which has been what has thrown me off of the “it’s a rock” thought

 

[elh0102]

I was thinking that, but I have had rocks get caught in the shielding before and it sounds nowhere near the same. The squealing from the rocks are usually lower pitched and inconsistent, but this sound is higher pitched and more of a consistent sound. It’s also been doing this for the course of like 500 miles which has been what has thrown me off of the “it’s a rock” thought

That sounds like the high pitched squeal that I had, but mine went away with a short reverse. If it's the same thing, it's definitely not a rock.

 

[MR_O’s_DE5]

Glazing on the rotors?

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