saltydizzle

I did a search and found a few different things but was wondering if someone can chime in here.

Basically my car has been sitting for about 3 months due to my travel/work schedule. I started the car this past weekend and drove it quite a bit. Car drove like normal, however, I noticed that as the more I drove and the warmer the brakes got, there was a very distinct humming sound coming from the front brakes starting just over 40mph and ending around 35mph. Does not happen at any other speed. I just had the rotors, pads and sensors changed a year ago. In that time I have put maybe 7500 miles on the car.

So my question is, do you think this is the SBC going or do I have pad deposits on my rotors causing this noise?

Any help is greatly appreciated

62not63

I think it your tires.

saltydizzle

if its the tires, its happening on my brand new pirellis on my 20's AND my stock 18's

GT-ER

My car once started to kinda hum in the front...kind of like a low toned powder horn sound. It went away and never came back though.

saltydizzle

Thanks for the reply. Im starting to think that because the car sat so long that could be the reason for the hum. There is no noticeable vibration in the steering or brake pedal, just the humming sound from like 43mph-35mph. Still very annoying.

Any other opinions are welcome...

saltydizzle

after further inspection of the front rotors, it seems that the cross drills have caked on, hardened dust in them. or at least what appears to be dust. So much so that the openings to the cross drills have almost closed completely. Could this be a possible culprit?

Bramage

Spray them down with Brake cleaner, then do a little spirited driving.

Could just be some crud, and if so, it will come off / burn off

vettdvr

If not brakes it could be a wheel bearing beginning to fail.

msheredy

That's what I was thinking. Just jack up and spin both front wheels (should feel smooth and spin w/some resistance) and check for side to side and top to bottom play since you have it up to see if there's any wear in the ball joints.

You can also do a couple hard stops, 60-0 in a hurry but keep the car moving after you're done as you can warp the rotors if you do this to much and hold the car with the brakes. Hope that makes sense.

shardul

iTrader: (1)

could be the wheel bearings

stockC43

I bet the back sides of the rotors are rusted. For whatever reason the rotors rust more on the side that faces the dust shield vs the wheel. Sbc is good at hiding the feeling of rusted or glazed brakes. Take a wheel off and look at the back of the rotors. If there rusted, drive 200-300 miles and see if it goes away. If not you will need new rotors. Btw, don't do high speed heavy braking to clean the rust. The rust will cause a inconsistent surface there by causing hot spots in the rotors, permanently warping or cracking them.