[masster]

hi

here is my problem:

Last winter I changed myself the front discs and pads at 100,000 km. After a while (200 km) I noticed that my car was somehow more sluggish and a high pitch noise came from front wheels only at around 40 km/h. So I figured it out that brake pads couldn't 'travel' enough thus my front wheels were slightly braked. I looked at caliper brake pistons and I noticed they were moving very hard while braking. So I took out the calipers, got the pistons out, squeaky cleaned the cylinders, changed the gaskets and I was good to go. Problem was solved.

Now, after some 6 months, I noticed that my front wheel rims are quite hot (50 deg. C) although I didn't brake too much. In fact I found a 10 km free road and drove that distance without any brake (I let the car stop by itself). But again... rims were hot.

So what is going on ???

[WeekendMechanic]

I don`t see why you are concerned with this,its breakpad to steel,for you to be concerned the disc must reach a temperature in which it could distort over 1000 deg.c, so I`d say your good....

This post has been edited by WeekendMechanic: 05 August 2010 - 23:41

[djaychela]

Front brakes dragging very slightly again?

[philje123]

The best thing to do is make sure the pads are able to move freely inside the carrier. They get very clogged up and start to rust and cause friction. Clean then up with a wire brush and then absolutely smother them with copper grease and stick some on the back of the pads too.

I had a similar problem after changing mine where they were catching slightly and squeeking. Did the above and not a problem after that.

I don't, however, think that 50c is anything to worry about. At the end of the day there is metal on metal stopping 800kg+ of weight from 60mph+ so there is going to be some heat.

Phil

[masster]

thanks for suggestions.

I must remind you all that I was referring to brakes heating when rolling and no brakes applied...

[J242]

the wheels will get very warm depending how fast you are driving from the friction between tire and road. besides isnt it an advantage for the tires to be nicely warmed up? :D

[masster]

J242, on 06 August 2010 - 14:00, said:

the wheels will get very warm depending how fast you are driving from the friction between tire and road.  besides isnt it an advantage for the tires to be nicely warmed up? :D

tires-yes. wheels hub and rims - nono
I didn't reach Mach 1 after all... :)

[GentleGiant]

You said, "Squeaky cleaned".... you DID copper grease everything I hope. Otherwise they are probably 1/2 seized.

[masster]

ok. i solved my problem by taking out each brake pad and looking for friction marks on both pads and caliper housing (or brake carrier).
then I sanded those points with 800 sandpaper and applied some Copaslip (often misspelled as copperslip or coppaslip) anti-seize compound.
all working smooth now.