soarin87

like the tittle staes wet brakes = cruching noise when either washing it or in the rain apply the brakes and crunching noise stops after it drys up idk whats the cause i have never had this situation before any help?

Batiatus

Mine do this too. It's probably just the rain and rust getting wiped off.

soarin87

thanks anyway to stop it? it kinda freaks out the gf

Batiatus

I don't know how you could stop it. Maybe get some new rotors lol. Even new ones would start rusting after a while. Some have a coating or made out of different material but that's an expensive fix. The stuff wipes off after a couple stops anyway. I wouldn't worry about it. Just tell her its normal.

LEXXIUM

iTrader: (1)

It's normal, think of it like squeaky clean squeak

greens14

iTrader: (28)

if it is in fact rust, (not saying thats what it is) you can purchase a gallon of rust-off? or some brand rust remover at your local autostore and just dip your rotors in there for two hours and wipe them clean.. its cheaper than buying new rotors while they can still be resurfaced

Lexiana93

its normal. everytime i wash my wheels and get the brakes really wet it makes the noise. apply the makes a few times to dry em up it will go away.

MstrTech

The noise you are describing is actually a vibration harmonic between the rotor and the pads. To get rid of it you need to clean the rotors, calipers, and place a beveled edge on the wnds of your brake pads. When you put it all back together you need to lube the contact points in the caliper and coat the BACK of the pads with a non-melting silicone lube, Sil-glyde from napa is by far the best I've ever used. Be very careful not to get any on the brake friction surfaces as this will ruin the pads. I have done this on hundreds of cars over the last 20 years. I also do this on every brake job I do, I give it a lot of credit for my 0% comeback rate on brakes.

BTW, the moly lube that is so common for this doesn't work nearly as well.

MstrTech

Sorry, bevel the Ends, not the wnds of the pads. (unless you can find the wnds of the pads, if so, give it a try... lol.)

Batiatus

That's good info. I never though it could be the brake grease but it makes sense. How would you bevel the ends of the pads? I know some come that way but for the straight ones would you just use a grinder or file?

MstrTech

Either one works, just make sure you don't breath the dust. Also, you wanna shoot for about 30deg from parallel with the brake pads surface.

Kira X

iTrader: (24)

My brakes do that if I spray water directly at the brakes and then try to move the car before they dry off.

WadeLovell

iTrader: (5)

Quick Poll:
What pads and antisqueal are those of you with this issue using?

speed6

iTrader: (1)

although this is the correct procedure, and i recommend synthetic caliper grease vs silicone lube, (never use bearing grease, etc, it will dry and cause the pins on floating calipers so stick), and never clean the sc's integrated brake boots out with brake cleaner. it will eat them up.
the popping noise is common. it's the heat boiling the water that is on the rotor, causing a popping noise when sandwiched between heating up rotors and pads.

What i can recommend, is what the new porches do. Slightly apply pressure to the brakes while on the gas (left foot breaking) to heat the rotors and dry them.