NikolasSumrak

Hi there!

I have 2022 F Sport, and after 50k miles I started filling vibration during braking. Dealer found that front discs are bad and need to be replaced. I ordered new OEM discs and replaced them by myself. I also changed brake pads.

After that I noticed that discs are too hot after driving on highway (it does "pshhhhhh" when I apply water on disc). I changed pads back to old ones (had a guess that new ones doesn't fit or something) but it is still an issue.

Planning to order Brake calipers repair kit and do some work there, but not sure if it will help.

Any ideas on that?

ravenuer

Well, discs do get hot after driving for a while.

LatinLS430

iTrader: (1)

I don't understand the problem? Why are you putting water on the discs? Are they glowing red after you stopped?

NikolasSumrak

I usually did that for old cars: when you spit on brake rotor and it is hissing like water on frying pan = it means that rotor is overheated, and brakes need to be repaired.

For me it happens after regular trip, I'm not driving like Formula 1 pilot, so I think that this temperature of brake rotor is high. But if anyone else has the same - maybe this is normal temperature, that's why I'm asking here.

LatinLS430

iTrader: (1)

I'm not familiar with the brakes on the F Sport for the RX, but I'm pretty sure you are good and don't need to worry about them getting too hot. You got OEM replacements so that's a good thing.

IntrinoX

iTrader: (1)

It's normal for your rotors to hiss if you splash water on it. It'll evaporate immediately.

Now if it's like burning red in color, then you have a problem..

Volley

Has you gas mileage dropped significantly? If not, I think you are good to go.

john2101

Wow wow wow, hold it there.

The brakes do get hot when they are applied, i.e. the brake pads are forced to stop the rotating rotor. Any brake can be overheated. If you are going down a mountain or stopping from high speed often, like in a race, it's normal for them to get hot or even overhearted.

Regular driving on the highway should keep the rotors at ambient temperature, no friction should be applied while driving. If they are hot, chances are, your calipers bind, or you didn't install the springs on the pads correctly... I assume there is no bearing noise, that could also cause the hub and disk to get hot.

dwoods801

If you replaced the pads and rotors with OEM replacements then they should not be any hotter than before. You shouldn't be hitting them with water while they are got unless you would like to warp them? It's certainly possible your caliper slides pins need to be greased. This is something that you can count on the dealership doing as part of every brake job and is part of why they charge a lot for a job that seems like anyone could do themselves. If the caliper isn't able to slide freely then the brake pads could be sticking and dragging on the rotor at all times and that would cause it to get hot, and could be what warped your last set of rotors.

autotech13

Adding water to hot discs will warp them!!!

toyotaman7

If you serviced your caliber pins and lubed them as well as cleaned at sliding surfaces and lubed them, in addition to new parts you should be good.

Normal for brakes to be hot after driving.

Not a good idea to splash them with water though. It will warp the rotors.

Pierregirard

If your brake lines are old or damaged, they might be getting constricted and causing pressure to build up in the brake system. This can stop the calipers from releasing properly. I’d think about replacing the brake lines if they look worn out or damaged.

sderman

When braking, you are converting all of your car's kinetic energy into heat. So, some of the gasoline you are burning is ultimately heating your discs.