Hey everyone, I did more investigating on my vehicle for the weird noises it was making and noticed this squeak coming from the front driver's side wheel well. 2005 DB9 Auto w/ 7500 miles total.

Notes:
- This sound goes away as soon as the steering wheel is turned to the left. This is only heard if the vehicle is driving straight (after turning it right) or while the steering wheel is turned to the right.
- It does not make this sound when the car is "cold." Only noticed after driving it for a bit and can only hear this with the windows down.
- Driving the car in reverse makes it go away immediately after when driving forward, until I take a trip around the block and then it comes back.
- I recently replaced my air filters which required removing this wheel and dropping half of the liner, but I don't imagine this is a result of that work.

What does this sound like and how should I fix it?

 

can't hear a thing. but i would remove the wheel-well liner and look for the problem there. it's a coincidence that cannot be ignored, IMO. having just done that job on my vantage, the liner must be jammed back out of the way unless completely removed and it would be all too easy to bend that plastic into a position that could end up rubbing on something. not to mention a number of other gotcha's.

 

You don't hear the high-pitched squeak? Thanks for your help btw!

 

That is a brake squeak. I would remove the pads, rough them up a little and let them bed in again. Try power washing the disc and caliper too.

 

Thanks! Should I rough them with some coarse sandpaper?

 

nope, can't hear a thing. maybe i have a high frequency hearing loss. it's not as if i'm too young to have one. or maybe the speakers in my 'insignia' monitor are too cheap to reproduce it. IDK.

 

Agree it sounds like a brake and seems like it happens about the same position every time as the wheel goes round.

When it comes to squeally brakes, a few hard (almost) stops might clear it up.

If you do pull the pads to scuff off any glazing, also be sure to lubricate the pads when you put them back.

 

Thanks. I'm actually pretty new to brake work. What product would I use to lubricate them? I want to make sure I get it right considering brake work on friction.

 

The auto parts store will sell brake lube, often times in little 1 job packets for a few bucks. Or you can get a can of it and have enough for a lifetime of DIY brake jobs.

You grease the edges of the pads where they contact the caliper, but don't get ANY on the face of the pad or the rotor.

There are lots of videos to help explain. Quick google search I found this:

 

Thanks a bunch for your help! I plan to be taking the wheels off to do my door struts this weekend or the next, so I'll get prepared for this small job, as well.

 

Pads are really easy with Brembo calipers. Just pull 2 pins and the come out the back side, no need to have the caliper off like the old floating calipers.

You may or may not need to compress the caliper a little bit to loosen them up. DO NOT jam a screwdriver between the disc and the pad to lever it apart you will likely damage both in the process.

 

Getting into this today and have the wheels off already. What is the best way to compress the pistons? Aston1936 recommended the screwdriver method, but I'd like to use the safest method possible.

 

Open the bleed screw to remove fluid, you do not want to shove old fluid backwards in an ABS brake system. Good time to replace brake fluid and bleed as most folks don't have the tools or ability to actually do that.

 

last time i had to push the brake pistons back, as someone mentioned, i loosened the bleed valve and was surprised how much easier it was to move them back. i just wish i had attached a hose to the valve before hand. as it was i had a little cleaning up to do. i suppose one should check the fluid level afterwards. IIRC i just pushed back on the thick cast iron pad backing plate with a stout object.

 

Good thinking, guys. I already pulled the pads and lubed them with brake lube, but next time I replace pads I'll do the brake flush at the same time. This needs to be done on my car anyway.

Also, I was able to compress the pistons a bit with my hands alone. I will use channel-lock method on the next brake change unless someone offers a better alternative.