DIY tidying of brake discs

[anonymous-user]

The rear brake discs on my Eunos are making a reasonably audible brushing / scraping sound when moving. They work fine, the pads have plenty left and they passed the MOT yesterday, so functionally they're fine, but they're a bit pitted and rusty and have a rust lip around the top edge.

Can I tidy them up myself? I was thinking perhaps removing the disc and mounting it on a drill or bench grinder then using coarse sandpaper to tidy up the rough edge and a finer grade to clean up the main face - I can't think why that wouldn't work but perhaps someone can tell me if there's a better way.

thanks
James

[garagewidow]

i done mine with a fine very flat file with the discs on the car with the engine idling in first gear.a bit dangerous possibly but it worked ok,just be very carefull if you have long wheel studs.

[duncancallum]

use a flap disc in a grinder

just run tound the edge to tidy and make sure the pads arent stuck in the carrier.

[anonymous-user]

Cheers, in the end i used an orbital sander to flatten the worst rusted areas, and after a few miles the brakes are now much quieter - not perfect yet, but much much better than they were before.

[smn159]

Why bother when new disks can be had for about £15 each?

[mk2 24v]

smn159 said:

Why bother when new disks can be had for about £15 each?

not for every thing they arent

think the rears i got for my granada were 50quid, and that was with trade discount

[smn159]

mk2 24v said:

smn159 said:

Why bother when new disks can be had for about £15 each?

not for every thing they arent

think the rears i got for my granada were 50quid, and that was with trade discount

Yeah and disks for my 968 were £65, but we're talking about a Eunos here!

[anonymous-user]

Yeah, why bother spending 5 minutes cleaning them up when i could just chuck them and spend £40 inc. delivery for a new set...

[smn159]

JimSuperSix said:

Yeah, why bother spending 5 minutes cleaning them up when i could just chuck them and spend £40 inc. delivery for a new set...

Must admit that what you've described, i.e. removing the old rusty, pitted disks and then replacing them didn't sound to me like a 5 min job; particularly when you're likely to be back under there soon doing the job properly and Euro Car Parts have new rear disks at about £13 each.

Depends how you value your time I suppose

[anonymous-user]

I was referring to the time taken to clean the discs, not the full removal and refitting, which i'd be doing anyway with a new set. Seeing as the car does only a max of 3000 kms per year these discs will last ages, so i'd rather save the £40 for something that actually needs replacing.

Besides, working on the car is fun, even more so if you can refurbish something and not just reach for the credit card because something looks a bit tatty.

Edited by anonymous-user on Wednesday 29th September 19:20

[bucksmanuk]

This my friend is exactly what you need
http://www.flexhone.com/
It won't get the discs flat, or take out the ridges, (you need a lathe for that) but it does a truly superb job of getting a great surface finish back on them.
I don’t work for them or anything like that, but one of their products has just saved us from some VERY expensive rectification work on a mildly corroded precision sleeve.