Lately I've heard a chirping noise from the passenger side rear wheel area in a left curve, when I have some significant g-force in play. No noise in a gentle curve. No far I've checked the following:
1. The wheel bolts were torqued to spec.
2. The wheel bearings show no sign of play.
3. A careful inspection reveals no signs of damage. There are no small rocks lodged anywhere either, especially between the rotor and the backing plate.
4. The caliper mounting bolts were torqued to spec.
5. The hub retaining bolt was very tight - >175 lb/ft.
6. The brake pads show even and minimal wear.
7. The rotor has no cracks and shows minimal wear. There is essentially no lip forming yet.
8. Mounted, the rotor has .054mm of run-out. Max allowable is .06mm.
It seems a little difficult to believe the rotor run-out is causing the chirping. I suppose the
next
step is to replace the rotor. Any other ideas?
I should remember but is your car stock or do you have some mods? Have you also checked the parking brake hub for rocks? How many miles? Rotor wear seems unlikely to me.
I didn't check the parking brake hub - I'd have to pull the rotor for that. Good thought, though.
The car is bone stock. 8700 miles. The rotor has essentially no wear, so the measured rotor run-out was that way from the factory, though .05-.06mm isn't very much.
I just went out for a fun drive, er, a test drive. I found that the chirping still occurs on hard left-hand curves, never on right hand curves. One new piece of evidence - I could not get the chirping to occur with PSM turned off. That's *got* to be brake-related. I think that rotor has got to go.
Only one way to find out. You could always consider ear plugs.....kidding.
I noticed the same noise tonight. I could get it to sound only with super hard right turns which resulted in the noise coming from the drivers rear tire. It almost sounds if the tire tread is hitting or rubbing on something in the wheel well. I will experiment with it tomorrow to see if I can figure it out.
The more cautious among you may cringe at this, but... Mine was doing the same thing, and I narrowed it down to the e-brake. My guess is it rusted a bit after parking without drying the brakes after a wash.
I could very easily make the noise worse by pulling up the e-brake while driving @ slow speeds.
Here's the queasy part. I took it out and got some "heat" into the e-brake pads by pulling the e-brake at 30-40mph, dropping a few mph, getting back up to 30-40 and repeating a couple times.
e-brake still works, and the sound has been gone for a couple months now.
