My tintop will be due it's MOT soon and all 4 brake discs are getting a fair band of corrosion on them. The car only gets used once a week or so and although the discs and pads were replaced a couple of years it was they have only done 2 or 3 thousand miles.

Rather than spend £100 on new discs all round I wondered if anyone has a lathe in the close vicinity to me that I could have a go at skimming the discs on please? It probably isn't worth paying someone to skim them as it would cost nearly as much as a set of new ones - or am I being stupid?

Cheers

Mooky

Unless they are badly pitted clean the edge corrosion off with a flap wheel in an electric drill or cup wire brush in an angry grinder then the surface of ith 80 grade production paper, you can use an orbital sander or belt sander linisher.

MOT requirements don't require absolutely pristine disks.

Some manufacturers can supply new pads with an abrasive surface that will clean the discs whilst bedding in (Peugeot at least) In the dim and distant past BMC/British Leyland procedure for cleaning discs was to place some production paper between the pad and the disc with the car raised then chock the opposite wheel and drive the car applying the brakes . Health and safety would have a field day but it worked. You may find just giving the car a good run using the brake as much as possible will have the same effect?

What he said, just take it for a ride in the country with plenty of hard braking, it'll clean them up. It'll also loosen the calipers up, if you're only doing light miles chances are they're a bit sticky and may cause a bit of trouble at the MOT.

I used to jack up - wheel off - engine on - in a gear of choice..
While disc rotating - apply grinder - tidy edges & remove lip on disc.
Obviously - if the discs 'are' knackerd change em out!!

quote:

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Originally posted by Slimy38
What he said, just take it for a ride in the country with plenty of hard braking, it'll clean them up. It'll also loosen the calipers up, if you're only doing light miles chances are they're a bit sticky and may cause a bit of trouble at the MOT.

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They are bad enough that they don't clean up on a good run out with some hard braking any more.

In the old days I would have had them skimmed but I'll try the flap wheel thing

I can added have also used those paint stripper pads for the drill also work well but cost an arm and a leg from B&Q much cheaper from small tools stores.

Dont think it will be a huge problem at mot, ive changed pads onto seriously uneven discs (a pad had actually fallen out it was that worn), pads have lasted ages and didnt get mentioned at the mot. Even if it fails you can fix it for the retest.

quote:

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Originally posted by johnemms
I used to jack up - wheel off - engine on - in a gear of choice..
While disc rotating - apply grinder - tidy edges & remove lip on disc.
Obviously - if the discs 'are' knackerd change em out!!

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