Technical Red hot brake discs

[nawtwrong]

I've just replaced the front brake discs on my Mk2 Punto 8V 1.2.

After fitting the new discs and putting the pads back in the callipers, I heard a bit of friction between the pads and the discs when I turned the wheel (before I lowered it to the ground).

I've been out in the car today for 10 mins, tested the brakes, they work fine but the discs were absolutely red hot when I got back.

Is it normal for the pads to rub slightly against the discs when driving?

I reckon this is causing them to get hot while I'm driving.

Cheers for ur help!!

 

[alexb]

Your disks will always get hot - You can't stop that. It's part of the way they work. Your disk brakes work using friction, a by-product of friction is heat.

AFAIK, the pads and disks always rub together very slightly.

 

[JonnyBoy]

There's normally a little contact between pad and disc with the brakes off, this isn't enough to generate any noticeable heat though.

A lot of heat is generated when you actually brake though, and it takes the discs a while to cool down. Sounds like your brakes are fine to me.

 

[nawtwrong]

Thanks, thats ok then. Just wanted to make sure for when a txi driver pulls out in front of me!

Cheers!!

 

[gsbellew]

Em, but red hot after normal driving?

Even on track days I didn't notice my brakes to glowing red after a run

 

[darkcircuitUK]

Think its just a figure of speech

 

[arc]

Em, but red hot after normal driving?

Even on track days I didn't notice my brakes to glowing red after a run

drive harder

the pic is from a 1l corsa, but we did the same with a 1.2 8v punto

 

[hmallett]

You say you tested the brakes for 10 minutes, so obviously they'll get hot then, but how long did you drive for without heavy braking? I think it can take quite a while for the disks to cool back down, especially if you're not moving. The only times I've had red-hot disks are when:
The rear brake was binding slightly. This squealed a lot too.
A session of "spirited" driving down some back lanes. I actually got the pads smoking quite heavily
Try again, and drive for a decent period with as little braking as possible, possibly even doing the final stop on the handbrake. Then see how how they are.
H

 

[gsbellew]

drive harder

the pic is from a 1l corsa, but we did the same with a 1.2 8v punto

Ahhh right, I suppose the solid disc wouldn't help in comparison to my vented ones, and seeing as I can barely see the brakes I suppose I don't know what could be going on behind the wheels really, still though, for normal driving the brakes should not glowing.

 

[arc]

you know, i don't know if puntos have vented discs or not - but yeah, you are right normal driving they shouldnt be glowing!