discs/pads
Author
Discussion

AlVal

Original Poster:

1,891 posts

284 months

Wednesday 27th June 2012
quotequote all
so new pagid discs and eicher pads from euro car parts. 9 months/7000 miles later, they're warped.

Acceptable? I'm writing a complaint email. If I was the shop, I'd assume the customer simply mistreated them / pushed them beyond tolerance, but bear in mind I'm an MPG driving economy "enthusiast" or whatever - see my mileage graphs here where I (yes, somewhat anally) track the economy

http://www.fuelly.com/driver/alval/charade

Now.. you can't achieve figures like that if you're a heavy user of the brakes, so it's fairly obvious I'm not lying when I say I'm an _extremely_ light user. Do brake manufacturers offer any warranty or the likes? am I wrong to expect them to, in my circumstance?

FoundOnRoadside

436 posts

164 months

Wednesday 27th June 2012
quotequote all
Warped? Doubt it.

Contaminated with pad friction material sticking to the disc by the driver not releasing hot brakes? More likely.

davepoth

29,395 posts

219 months

Wednesday 27th June 2012
quotequote all
Actually, long gentle brake application probably builds up the heat more than short and sharp brake application. But the real killer is holding the car on the footbrake while stationary when there's temperature in the brake pads.

AlVal

Original Poster:

1,891 posts

284 months

Wednesday 27th June 2012
quotequote all
I'll get some pics up once the discs are off/replaced.

fozzymandeus

1,076 posts

166 months

Wednesday 27th June 2012
quotequote all
It isn't always "heavy" use that warps discs. Driving through water and applying the discs causing rapid cooling/heating can achieve it.

Very difficult indeed to prove poor manufacturing when it comes to friction kit.

OT, OP, but I notice from your profile you have a Daihatsu Charade that appears to be an appreciating asset! Is this some classic car phenomenon I'm as yet unaware of, or have you had it gold plated?

300bhp/ton

41,030 posts

210 months

Wednesday 27th June 2012
quotequote all
AlVal said:
so new pagid discs and eicher pads from euro car parts. 9 months/7000 miles later, they're warped.

Acceptable? I'm writing a complaint email. If I was the shop, I'd assume the customer simply mistreated them / pushed them beyond tolerance, but bear in mind I'm an MPG driving economy "enthusiast" or whatever - see my mileage graphs here where I (yes, somewhat anally) track the economy

http://www.fuelly.com/driver/alval/charade

Now.. you can't achieve figures like that if you're a heavy user of the brakes, so it's fairly obvious I'm not lying when I say I'm an _extremely_ light user. Do brake manufacturers offer any warranty or the likes? am I wrong to expect them to, in my circumstance?
I don't believe discs warp, at least not in 99.9999999999999999999999999999999999% of the claimed cases.

It's usually down to not bedding in the brakes correctly and getting an uneven carbon build up on the disc surface. You can have the discs honed to sort it out.

Some good info here:

http://www.ebcbrakes.com/automotive/pro_cut_lathe....

AlVal

Original Poster:

1,891 posts

284 months

Wednesday 27th June 2012
quotequote all
hehe, not an appreciating asset! only reason I managed to buy it for £850 was due to the fact it needed work (new clutch, brakes , tyres etc) the minimum price for a <10yr old car that doesn't need any work is around £1500 I reckon.

so it hasn't appreciated at all, you've just not looked at the servicing money spent! biggrin (which needs updating!)

also, I appreciate and understand the valid advice about not holding pads against discs for a long period without letting up, or while hot in stationary traffic etc, these are things I'm already conscious of, and naturally don't do out of good habit. Remember also JUST how economically I'm driving , when I say a light user on the brakes, I really mean it, rarely use them except when I really have to (i.e. I read the road in advance as much as possible so that I can slow in advance and avoid the need to brake at all generally. you don't hit a true 70mpg without avoiding wasting energy through braking.

Just noticed something else while I ordered the new discs - euro car parts list 4 different discs as valid options for the car, 2 of the options have 236mm discs, and the other 2 options use 211mm discs, I wonder if this can be right - surely only one disc diameter should be manufacturer reccommended? last time it was the smaller 211s used, this time I'll go for the 236mm option, as most other sites I can find list the discs as 236mm

AlVal

Original Poster:

1,891 posts

284 months

Wednesday 27th June 2012
quotequote all
doogz said:
The disc size will depend on the caliper and carrier used.

Quite often, this will change throughout the life of a model, not necessarily because the manufacturer thinks they need bigger brakes, but because they'll phone up Lucas, or Bosch, or whoever, to order a few thousand calipers, and that's what they'll be able to provide.

If your calipers suit the 211mm discs, you can't just fit the larger ones, it doesn't work like that.

This is why you'll quite often be asked for your reg, or chassis number, when ordering parts, to confirm they're ordering you the correct things.
thanks for the advice, euro car parts online ordering does take the car registration number and shows you matching parts based on that, but it still shows both 211 and 234mm disc choices. does it tend to be very much a zero tolerance thing, or could I have perhaps provided my mechanic with 211mm discs last time, when I should have provided 234mm discs, and perhaps be causing the "warping" by using too small a disc at the moment? or would smaller discs not fit/work at all either?

Krikkit

27,727 posts

201 months

Wednesday 27th June 2012
quotequote all
Smaller/larger discs simply wouldn't fit correctly with the appropriate pads (and they really won't be interchangeable for different calipers).

The ECP site is a bit hit and miss like that, you have to know exactly what spec of disc etc you need. Also, use carparts4less.co.uk unless you want tools - cheaper by 30%ish from the same company.

Nice But Dim

469 posts

227 months

Wednesday 27th June 2012
quotequote all
If you are using www.Eurocarparts.com they currently have a discount code on brake pads/discs etc of 30%

Use promo code DP30 at on-line checkout

AlVal

Original Poster:

1,891 posts

284 months

Wednesday 27th June 2012
quotequote all
Cheers all, found a code midmonth30 Which workef for 30%

lexusboy

1,101 posts

163 months

Wednesday 27th June 2012
quotequote all
It would be worth measuring the run out of your front hubs just to completely cover yourself as there is excessive runout then you will warp any disc you put on

snapdragon69

207 posts

203 months

Wednesday 27th June 2012
quotequote all
Probably those crappy Indian-village brake pads. I bought a set in a moment of madness and couldn't order a set of decent ones to replace them fast enough, they were dreadful in every parameter possible.

defblade

7,920 posts

233 months

Wednesday 27th June 2012
quotequote all
lexusboy said:
It would be worth measuring the run out of your front hubs just to completely cover yourself as there is excessive runout then you will warp any disc you put on
This. All the trouble I've ever had with new discs has been not cleaning the hub flange properly. Shows up after a short while - maybe 2000 miles or so.

motco

17,160 posts

266 months

Wednesday 27th June 2012
quotequote all
What do you think happened here then? New pads not long earlier, one track day and a thousand miles maximum...


AlVal

Original Poster:

1,891 posts

284 months

Wednesday 27th June 2012
quotequote all
defblade said:
lexusboy said:
It would be worth measuring the run out of your front hubs just to completely cover yourself as there is excessive runout then you will warp any disc you put on
This. All the trouble I've ever had with new discs has been not cleaning the hub flange properly. Shows up after a short while - maybe 2000 miles or so.
this sounds like the most likely culprit

AlVal

Original Poster:

1,891 posts

284 months

Wednesday 27th June 2012
quotequote all
motco said:
What do you think happened here then? New pads not long earlier, one track day and a thousand miles maximum...

I'll have a go! you had vented (grooved) and/or drilled discs and the pad got caught in a groove or drillhole

motco

17,160 posts

266 months

Wednesday 27th June 2012
quotequote all
AlVal said:
motco said:
What do you think happened here then? New pads not long earlier, one track day and a thousand miles maximum...

I'll have a go! you had vented (grooved) and/or drilled discs and the pad got caught in a groove or drillhole
You could be right - I don't actually know but what I do know is that it shouldn't have happened and would have been dangerous at high speed. The pads are described as good for road and track...

B'stard Child

30,601 posts

266 months

Wednesday 27th June 2012
quotequote all
AlVal said:
motco said:
What do you think happened here then? New pads not long earlier, one track day and a thousand miles maximum...

I'll have a go! you had vented (grooved) and/or drilled discs and the pad got caught in a groove or drillhole
Or more likely sticking caliper or piston(s)

New POD

3,851 posts

170 months

Wednesday 27th June 2012
quotequote all
doogz said:
This is why you'll quite often be asked for your reg, or chassis number, when ordering parts, to confirm they're ordering you the correct things.
Well I'm stuffed on my cavalier then. The fronts are from a later 1.8 as one of the smaller calipers was fecked, and a member of the Cavmk3oc.com forum, sorted me out with new larger calipers, so I had to buy new larger discs and pads, and when I did the rear shoes, they didn't have earlier shoes in stock so I was forced to buy later shoes and the later spring kit.