Discs warped again

[D3DNA]

Its not my driving style, I would only have myself to blame and easy to sort the issue!
I have done 13k on my front tyres with 5mm still left, most of my mileage is motorway.
35k per year!

Tyre wear isn't comparable to brake wear/warping as the design and forces involved are different.
You would be surprised how you driving style affects brakes. You say you mainly do motorway mileage, have you considered that if your in stop, start traffic that having to brake every 20 seconds or so doesn't allow the brakes to cool properly. Also holding the brake in traffic is like taking a blowtorch to the disc in one spot. If you don't brake for 20 miles and then have to brake sharply coming off the slip road to then have to sit at lights for 30-50 seconds? These things are what usually cause warping.

I see from your avatar pic that you have LCR (+) wheels, maybe the brakes are cooling too quickly and this is another issue?

All these variables need to be considered including the mechanicals.

 

[Canners89]

Thanks, anty idea where i can get replacement pistons and seals from for the brembo caliper?

speak to godspeed brakes, they will be able to see you right, pretty sure they will send you the kit so you can DIY, or you can send them your callipers and they will recondition them for you. I can vouch for them, i sent mine off (also brembos) and they came back absoultutly MINT as if they were brand new!! expect a turn around of 3 weeks or so though, which isnt ideal as you wont be able to use the car for that period!!

Link - http://www.godspeedbrakes.co.uk/

I will put some pics up when i get home of mine, they wont be great as they are now fitted to the car again - http://www.seatcupra.net/forums/showthread.php?p=3873930#post3873930

 

[Nath.]

The problem you'll find is that as the pads wear down, the piston moves out and gets stuck again, so the pad will always be in contact with the pad. You should really sort the piston out before you fry another set of discs and pads.

Agree, A sticky caliper will cause constant light brake pressure and overheat the disc. I've had the same thing before on Vauxhall rear discs. (common fault on the Astra MK5)

I bet if you get a run out gauge on your discs you will see one is fine and one is warped (unles you have 2 sticky calipers) KwikFit will put a run out gauge on your discs for free if they're not busy.

 

[glynnd]

Tyre wear isn't comparable to brake wear/warping as the design and forces involved are different.
You would be surprised how you driving style affects brakes. You say you mainly do motorway mileage, have you considered that if your in stop, start traffic that having to brake every 20 seconds or so doesn't allow the brakes to cool properly. Also holding the brake in traffic is like taking a blowtorch to the disc in one spot. If you don't brake for 20 miles and then have to brake sharply coming off the slip road to then have to sit at lights for 30-50 seconds? These things are what usually cause warping.

I see from your avatar pic that you have LCR (+) wheels, maybe the brakes are cooling too quickly and this is another issue?

All these variables need to be considered including the mechanicals.

What I was trying to show was the car isnt driven hard.
I understand all the replies etc but this is the first time I have ever come across this and if all noticed my earlier post, my previous Leon cupra tdi with 288 set up never had this issue in 70k of driving, under the same conditions, so sat in traffic with my foot on the brake isnt the problem. Pad build up yes I could agree, wish it was that simple. Seems its something other than this though, hence the thread.

 

[hoppy]

How did you go with the mount theory any joy? Did you sort the problem.

 

[Topper Harley]

I had vibration under braking and replaced my discs and pads with Mintex products. Vibration disappeared for about 6 months. It began again so I replaced the discs with genuine seat discs and they were again fine for another 6 months. When it started again I took the discs off and sanded them down with metal sandpaper and the problem went away. This told me that the problem was due to uneven distribution of pad material on the disc from poor quality brake pad material. I replaced everything with OEM parts and haven't had a problem since.

My conclusion? Don't waste your money on cheap parts: it will cost you more in the long run.

 

[TllEWL]

I'll back this up - I got through 3 pairs !! of LCR discs, and then bought Alcon two-piece discs and still the 'warped-disc' vibration came back

Only thing I've not changed is the pads ....which are Renaultsport OEM pads (so should be a decent quality) but this gives me new hope that I can fix it permanently, myself, for the price of some DS2500s

 

[Topper Harley]

A method to reduce uneven brake pad material and heat distribution is to not leave your foot on the brake pedal when stopped - especially if the brakes are hot. The Institute of Advanced Motorists (IAM) recommend putting the hand brake on if you are going to be stationary for more than a few seconds to help avoid this issue. This is because the rear brakes are often much cooler than the front so will be less likely to cause warping or uneven material distribution.

They also suggest to leave your foot on the brake pedal if you think following traffic may not realise you are stopped, but this is up to you to decide depending on the situation.

 

[glynnd]

How did you go with the mount theory any joy? Did you sort the problem.

It wasnt the mounts, it was the crap quality discs I was buying.
I had to buy genuine from TPS and they have been fine ever since despite my "driving style" !!