Author Topic: disks under thickness  (Read 1732 times)

Offline axewielder

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disks under thickness
« on: 11 August 2009, 12:47 »
Hey guys my front disks are at least 4 mm under min specified thickness, pads have loadsa life left though, just wondering if theres much of a problem with this or just leave it until the pads need doin?
There is the thick lip round the outside where it hasnt worn, this is the only thing i can think of that might be a problem but i can easily grind these off.

Offline Wayne

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Re: disks under thickness
« Reply #1 on: 11 August 2009, 12:57 »
I would change the discs asap, much safer.

gtigolfthree

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Re: disks under thickness
« Reply #2 on: 11 August 2009, 12:59 »
As above your brakes will overheat

Offline AudiA8Quattro

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Re: disks under thickness
« Reply #3 on: 11 August 2009, 12:59 »
If you keep running the discs they could crack or actually start to break up eventually.
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Offline axewielder

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Re: disks under thickness
« Reply #4 on: 11 August 2009, 13:00 »
yeha i get the cautious point but i was wondering if there is any 'real' problems that will arrise from under size disks, there is pleanty of metal left, and it breaks fine? they are vented so i doubt they will overheat under just normal use?

Offline AudiA8Quattro

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Re: disks under thickness
« Reply #5 on: 11 August 2009, 13:02 »
The less 'meat' on the disc, the less it can dissipate heat.
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Offline axewielder

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Re: disks under thickness
« Reply #6 on: 11 August 2009, 13:12 »
yeh i know but im not ignoring you guys, makes sense i was just thinking there is pleanty of meat left, plus they are vented and i really dont do any hard breaking so i cant really just see them overheating, yes im sure they wouldnt like being taken to the track but many cars have solids and can cope fine with heat dissipation. Just curious as to other things that i may not have thought of?

Offline AudiA8Quattro

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Re: disks under thickness
« Reply #7 on: 11 August 2009, 13:16 »
I don't think you are getting it mate.
You are just thinking of the surface area of the disc, instead think of it as cubic area.
The less cubic area, the more the disc will heat up. Once it is below the manufacturers minimum thickness, the brakes will start to overheat, and that is just for normal road use.
This could lead to brake fade, cracks, or the disc breaking up.
Not that many cars have solid front discs now as they are crap  :laugh:
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Offline axewielder

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Re: disks under thickness
« Reply #8 on: 11 August 2009, 13:26 »
No i get you man probebly wont risk, sorry if i was sounding ignorant+ stuff, appreciate your input  :smiley:

Offline Matty-MK3

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Re: disks under thickness
« Reply #9 on: 11 August 2009, 18:49 »
Deffo get them done. It's really not safe at all. If they crack, then you have no brakes.  :shocked:
Golf MK3 1.8 auto and I didn't pay a grand for the "priveledge" :grin:, auto windows all round and a AC. Oh and I've got a luggage net you pricks!

Does that make my willy look bigger?

Oh yeah it's called Helda or something....