Help with my 3's brake

[ssolidd]

After work I was driving 400 on night time with my co-worker and as I approach the curb press my brake pedal and feels very light pressing it all the way down to the floor while hearing a high pitched sound. I went to mechanic yesterday and find out my brakes (4 of them) are really worn out havent changed break in like 4 years so they told me to change the brake rotors and pad cost me $500 for the labor and parts which I think is a good deal.

They have installed my brand new brake rotors and pads(4 of them) and the mechanic drive the car with me for a test drive and telling me brakes ok give it a week for break-in. so I drive home after that but I feel the break is still really light and have to press all the way to the floor before it starts gripping for break.

It was yesterday after coming from my work that I just realized the break although its brand new doesnt have grip, I have to press really hard to the floor before it starts gripping and breaking, im not a mechanic but I swear driving a mazda 3 the break is really good even you press halfway it will work right away and this mechanic guy told me its normal because its brand new and need a week for break-in... im not gonna take that risk and my instinct tell me this brake is not good im gonna take this back to the mechanic later on and complain about it tell me your opinion guys thanks. :bang

[Canadianbacon]

You got no name cheap break pads, you should of done the research and bought the parts yourself

[silverstarmazda]

Bed in takes time, but it sounds like you might have air in the system

[FD22]

Bed in takes time, but it sounds like you might have air in the system

+1

Breaking them in should help with that. But if it's really bad, it sounds like maybe you need to bleed the brakes before jumping to replacing all the parts again. Not sure if the shop would've done that, but maybe they didn't do it right or something.

[r4BBiT]

Almost sounds like there is no hydraulic pressure, which would mean breakage in one of the brake line or maybe bad master cylinder.

When I changed my brake fluid recently I didn't tighten the bleeder valves all the way (didn't want to break them) and my brake pedal got softer closer to the floor instead of harder. They were barely sipping through; you can check the rubber dust caps on the valves and they should be dry and check all of your rubber lines going to calipers.

[Noisy Crow]

+1. Check the brake fluid level. As already noted: could also be due to air in the lines, bad seals at the the calipers, or both.

Also could have been failure to remove the anti-rust coating from the rotors before installing them, although that should burn off after a wee or two of driving.

[ssolidd]

Thank you for your input guys yesterday morning I asked a friend what he think about my brakes:

me: can you take out my car for a spin I just have a new brakes blah blah blah (4 tires) done
dude: (driving) I think something wrong on your engine its noisy its a serious thing you better check it asap
me: thats my new psm and rmm thats making the noise
dude: holy ^$$^
dude: about your brakes give them sometime maybe a week or two is still brand new

I decided to give it at least a week before going back to mechanic maybe break would slowly become stiffer and hard on grip as of right now if feels like they have problem with hydraulic because I need to floor hard the break before it works.

@ Canadianbacon:
You got no name cheap break pads, you should of done the research and bought the parts yourself
Lol you're right it was too late I should have asked our fellow mazda enthusiast for opinion.

@ silverstarmazda:
Bed in takes time, but it sounds like you might have air in the system
as in break-in? first time I hear that word :headbang

FD22:
+1

Breaking them in should help with that. But if it's really bad, it sounds like maybe you need to bleed the brakes before jumping to replacing all the parts again. Not sure if the shop would've done that, but maybe they didn't do it right or something.
The mechanic told me he didnt touch the fluid just replaced and oiled the rusty brake rotor and pads.

r4BBiT:
Almost sounds like there is no hydraulic pressure, which would mean breakage in one of the brake line or maybe bad master cylinder.

When I changed my brake fluid recently I didn't tighten the bleeder valves all the way (didn't want to break them) and my brake pedal got softer closer to the floor instead of harder. They were barely sipping through; you can check the rubber dust caps on the valves and they should be dry and check all of your rubber lines going to calipers.
Currently my brake feels as if there is no hydraulic pressure you nailed it :chuckle but im not sure yet if it has something to do with the fluid or brake system

Noisy Crow:
+1. Check the brake fluid level. As already noted: could also be due to air in the lines, bad seals at the the calipers, or both.

Also could have been failure to remove the anti-rust coating from the rotors before installing them, although that should burn off after a wee or two of driving.
Check my brake fluid is ok and no loss or leakage either in the brakes

[silverstarmazda]

just curious, did you watch them do the work? sometimes a shop will "short cut" the resetting of the piston by opening the bleeder valve instead of the master cylinder cap. during this time, air could of gotten in if they didnt do it properly.

breaking them in in brake terms is bedding them in. sometimes air/contaminants finds its way in even if you dont see a fluid leak. (rare since its a closed system with cycling foot pressure). try flushing the system with new fluid. the mazda uses a DOT3 which is glycol based and should be replaced every other year or so (depending on your use).

if your still having issues you might have air trapped inside the master cylinder, ABS module or something else.

[McGuyver_3]

bedding in brakes takes no more than roughly 5km. Bring the car up to 60-70km/h and step on the brakes slowly bringing the car to ~10km/h and repeat the process.
Considering your pedal is going to the ground, this is NOT NORMAL. I would go back to the shop and have them flush your brake fluid and check your lines for leaks. I have NEVER seen a pedal go to the ground because of brakes being worn out. And yes I have seen cars with metal on metal brakes with a firm pedal

[ssolidd]

After driving for one week I feel the brakes starting to kick in little by little I mean when pressing the brake pedal its much more stiffer than before but still need to adjust my break habits as before (I feels like having a brembo brakes before :chuckle).

silverstarmazda: I think they do ok I usually look from afar to what they are doing as they might get irritated or something :( but if I want to ask something or questions I approached them right away also now I know what bedding means.

McGuyver_3 : Thanks for the input as of now after one week of driving I feel brakes starting to stiffen little by little(hopefully be back to its normal) you're right about how I feel when stepping the break feels like some fluid air leaks or something before.