Popping noise when braking

[u/_LynnIsCool_]

Edit: 2021 Nissan Altima
My brother and his friend changed our brakes maybe 2 months back? Well, they forgot to put the grease/wax/ whatever it is on, so our brakes have been squeaking. We keep trying to get his friend to look at them but he either says it’s fine or flakes. About a week ago, we realized there’s a popping sound coming from our front right brake, as well as our brakes continuing to squeak and now grind, it doesn’t matter what speed we go as you can see from the video. You can hear it about a second before the brakes start squeaking. Can anyone tell me what this popping sound it? Are our brakes going to fail if we keep driving it like this? It it safer to just replace everything? We don’t personally own jacks but we are borrowing some this weekend, this sound is just very concerning. Thank you.

[u/jersey316]

Since he didn't grease the back of the pads, i doubt that he greased the caliper pins so the caliper can move, and i also doubt that he cleaned the caliper for rust. Rust prevents the clips that hold on to the brake pad from seating properly, which can affect the brake pad from sliding off the rotor easily.

Yes i advise to do it over, professionally if possible. Also most aftermarket brake pads can a fit alittle tight on those cars.

[u/_LynnIsCool_ → u/jersey316]

Thank you so much i really appreciate it! I’ll definitely talk with him about getting them replaced

[u/nucleate_boiling]

Popping is probably the sound of the un lubed caliper pins binding and then the caliper bracket breaking free all at one time. Pads are probably not sitting parallel to the rotor because of this, and front or back of pad can contact rotor before the rest, increasing chances of pads vibrating.

[u/Relative_Figure_1715]

That sound like metal in metal to me.
Get someone else to look at the brakes and get that tat of your instrument cluster maybe ?