Low Speed Scraping Sound.... need help VERY STRANGE
#1
Low Speed Scraping Sound.... need help VERY STRANGE
I've got a 1990 Miata and its making a metal on metal scraping sound from the front drivers side at low speeds 25-30 and on decel from those speeds while in neutral. Braking sometimes affects the sound and can sometimes induce it.
Driving over smooth bumps or hills will sometimes cause an increase in noise.
At first I thought it was simply a rock stuck in the brake shield but they are clean. My next thought was a front hub so that was replaced with no change. i have tried swapping both the front rotors and pads (left to right side) one item at a time still with no change.
At this point I figured it had to be the caliper dragging so it was also replaced.
As a last resort I tried swapping wheels with no change...
I am open to absolutely ANY input from ANYONE! Someone please sweet F*!@$ jesus!
Driving over smooth bumps or hills will sometimes cause an increase in noise.
At first I thought it was simply a rock stuck in the brake shield but they are clean. My next thought was a front hub so that was replaced with no change. i have tried swapping both the front rotors and pads (left to right side) one item at a time still with no change.
At this point I figured it had to be the caliper dragging so it was also replaced.
As a last resort I tried swapping wheels with no change...
I am open to absolutely ANY input from ANYONE! Someone please sweet F*!@$ jesus!
#6
Tied to vehicle speed? Might look for something falling down or blowing against the tire. I have had that happen a couple times with a liner/cover and thought the truck was coming apart. Would think it obvious, but have had some blow bad pretty far at speed. just a shot in the dark for ya.
The other thing might be a bearing in a accessory? or a pulley rubbing something.
The other thing might be a bearing in a accessory? or a pulley rubbing something.
#7
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jack car up, spin wheel. get a couple feet of vacuum hose and stick one end in your ear and the other end various places with the wheel spinning to see if you can pinpoint the sound.
#8
Tied to vehicle speed? Might look for something falling down or blowing against the tire. I have had that happen a couple times with a liner/cover and thought the truck was coming apart. Would think it obvious, but have had some blow bad pretty far at speed. just a shot in the dark for ya.
The other thing might be a bearing in a accessory? or a pulley rubbing something.
The other thing might be a bearing in a accessory? or a pulley rubbing something.
Y8's great idea, but with the car jacked up, we cannot replicate the noise.
#9
yeah, something rubbing out there was slim. Bearing like others said is most common. Brake pad squealer maybe? Pads? sounds different than you described but... Might pull the the caliper and look for tight clearance around the rotor. And your backplate clearance. If there is any movement in the bearing assembly it might shift just enough under load to cause your problem.
#12
I had something just like this recently. Turned out to be the brake shield was slightly bent, probably from when I did a lot of suspension work over the winter. I went through the trouble of switching out brake pads and clips/hardware, but no luck. Then I decided to give the brake shield a little more clearance just to be sure, even though it didn't appear to be rubbing when moving the wheel with the car on jack stands. I wedged a screwdriver in between the rotor and shield to bend it out just a couple more mm all around (I think underneath is where my problem was). I haven't heard the sound since.
Don't know if this is your problem since you say you already checked the brake shield, but if you haven't tried bending it just a touch, it might be worth it since it's quick and easy.
Don't know if this is your problem since you say you already checked the brake shield, but if you haven't tried bending it just a touch, it might be worth it since it's quick and easy.
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