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Brake Disc Corrosion

k1ano

New Member
Just some information which may prove useful ...

I recenlty had my cambelt done, service and MOT by Motech. Whilst this was being done the brakes were bled and checked over and some corrosion on the inside surface of the front brake discs was reported. These were removed and cleaned up but I obviously asked the question as to why this would happen on such a low mileage car.

The following information was given and I provide it 'as is' with my experiences ...

It appears as though condensation collects more on the inside surface of the discs when the Vee is parked up for longer periods of time in the garage. This condensation causes the corrosion which can pit or reduce the discs normally smooth surface. Now my garage is not heated or anything like that so guess the temperature fluctuates quite a lot allowing condensation to form. It was recommended to me to either use the Vee more often or to use the brakes more heavily when I do to remove the surface corrosion. I went out the other night and did some 'brake tests' and the inside disc surface is nice and smooth so I will keep an eye on things. This may also be why sometimes the brakes haven't felt as good as they should in the past with the first few miles, they are now spot on but of course this may be due to the bleeding of the brakes and the fact my failry new red-stuff pads will have bedded in nicely :approve:

Maybe all you 'daily drivers' will say 'I told you so' ;)

Martin
 
I found out so. I saw a brake disc which had split in two due to corrosion. (Steve Murr's I believe)

Much less corrosion on the rear, perhaps the heat of the engine dries moisture so less is left on there?

A new set of discs was the order of the day. Call me "paranoid" or even the latest buzz word "A CoCk" but I didn't want to risk driving along minus the discs.
 
Same here Martin. [smilie=boohoo.gif]

I'm now of the opinion discs should be changed after 5 years or sooner based on mileage.
 
Its not corrosion due to excessive moisture on one side.....the pistons in the calipers are sticky. Any corrosion would be wiped out within seconds of use.

Its a massively common issue on these calipers, not just with v's, but the rest of the nobles etc that choose to use them. Strip and rebuild.
 
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