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I just bought new rear tires at Walmart. They installed it. I noticed a slight squealing noise when reversing, could be hissing like train tracks noise. They told me to spray WD-40 on the caliper, I did, but the issue hasn’t disappeared. Even when I don’t have my foot on the brakes while reversing the noise is still present. I also notice the noise as well while driving. It’s coming from the rear, not from front tires, so it’s obvious Walmart had something to do with the problem? What could this be?
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With no information about your vehicle:
Pull the rear tires, pull and inspect the brake pads.
Perhaps perform a service on the calipers.
Also check for debris and possibly the dust shield(s) making contact with the rotor.P.S. ..
Never spray WD-40 on the calipers.+1 on the rotor shield contacting the rotor.
And whoever told you to spray WD 40 on your brakes needs to be beaten with a large stick that’s the last place to that you want oil on.
I know sometimes my rear drum brakes squeak when I first drive on a morning when the moisture is thick outside. But it goes away after the first ot 2nd stop sign.
For disk brakes it maybe dirt or some crud that is between the pad and rotor. You could slam the brakes a few times going forward and then in reverse and see if that does the trick. It could be the dust shield. If not take it back and have it checked. But I would not spray anything unless it’s brake cleaner
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Have you had the wheels off since WalMart put them on? If not, I would loosen the lug nuts and retorque them properly, following the proper pattern. No telling how monkeys with air guns put the wheels on.
The idiots at Walmart told me to just spray WD-40 on the calipers so the noise would disappear. Even when I’m not stepping on the brakes it makes a squealing noise when reversing. When I’m driving I could hear the “chirping” noise as well. My passenger told me he could hear it too and he told me my brake pads might be going out. I told him my car is a 2015 Mazda 3 that I bought just last year. Although I already did 32,000 miles on it, is it time to replace the brake pads or did the rookies at Walmart did something stupid?
[quote=”nightflyr” post=177807]With no information about your vehicle:
Pull the rear tires, pull and inspect the brake pads.
Perhaps perform a service on the calipers.
Also check for debris and possibly the dust shield(s) making contact with the rotor.P.S. ..
Never spray WD-40 on the calipers.[/quote]I think I had Walmart retorque it and got a wheel alignment or balancing after a week I had the new rear tires installed (I forgot which one I had done but I think it’s balancing since Walmart may not even do wheel alignments). Although the squealing noise already occurred after the rear tires had been changed, I’m not sure what a balancing did.
[quote=”Evil-i” post=177821]Have you had the wheels off since WalMart put them on? If not, I would loosen the lug nuts and retorque them properly, following the proper pattern. No telling how monkeys with air guns put the wheels on.[/quote]
Doesn’t WD-40 somehow evaporate? I only sprayed it on the calipers which may also have gotten on the brakes/rotors. If this is bad, how do I undo this mistake, do I spray a brake cleaner to “override” the WD-40?
[quote=”Disabled Automotive” post=177812]+1 on the rotor shield contacting the rotor.
And whoever told you to spray WD 40 on your brakes needs to be beaten with a large stick that’s the last place to that you want oil on.[/quote]
[quote=”bananaspree” post=177972]The idiots at Walmart told me to just spray WD-40 on the calipers so the noise would disappear. Even when I’m not stepping on the brakes it makes a squealing noise when reversing. When I’m driving I could hear the “chirping” noise as well. My passenger told me he could hear it too and he told me my brake pads might be going out. I told him my car is a 2015 Mazda 3 that I bought just last year. Although I already did 32,000 miles on it, is it time to replace the brake pads or did the rookies at Walmart did something stupid?
[quote=”nightflyr” post=177807]With no information about your vehicle:
Pull the rear tires, pull and inspect the brake pads.
Perhaps perform a service on the calipers.
Also check for debris and possibly the dust shield(s) making contact with the rotor.P.S. ..
Never spray WD-40 on the calipers.[/quote][/quote]As I said above start with that.
If you need the pads replaced you’ll see the wear indicator(s) ( a metal tab mounted on the brake pad) in contact with the rotor surface.
Which will cause a noise to tell you the brake pads are in need of replacing.
As to the WD-40,
If you did spray it on the calipers.. spray them down with brake clean to remove it.
Just wear eye protection and a dust mask.This should give you the general idea of what is involved.
Just went to Walmart and the manager informed me the noise is my “brake sensor” telling me it’s time to replace the brake pads.
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