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Sorceress
 Post subject: Warped Brakes
PostPosted: Mon May 30, 2005 8:30 pm 
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I think the run through the OPH to Terrigal warped my disk brakes!! :?

Cant believe ti! :evil:

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min13k
 Post subject:
PostPosted: Mon May 30, 2005 8:32 pm 
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i doubt that would happen maybe the bearings need a tighten what are the simptoms sorcy ??
makka

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Wolfman
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PostPosted: Mon May 30, 2005 8:38 pm 
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Yeah, I'm with Makka, never seen discs warp from normal use
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J_A_M
 Post subject:
PostPosted: Mon May 30, 2005 9:09 pm 
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well my shagn wagon daily hack had warped discs....it's an auto and I am heavy on the brakes......I had to replace them. $220 new....or $25 second hand :wink:

I say if you ride your brakes you can warp them!
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Morris 1100
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PostPosted: Mon May 30, 2005 9:26 pm 
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J_A_M wrote:
well my shagn wagon daily hack had warped discs....it's an auto and I am heavy on the brakes......I had to replace them. $220 new....or $25 second hand :wink:

I say if you ride your brakes you can warp them!


Trick question...... How do you know that they were warped? Did you measure the runout with a dial gauge?
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-=MiniMafia=-
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PostPosted: Mon May 30, 2005 9:33 pm 
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i heard u can warp discs by putting on the hand brake when they are hot. mind u that was from a ricer........

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min13k
 Post subject:
PostPosted: Mon May 30, 2005 9:41 pm 
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mini's dont have disk's on the back !!!!!!
makka

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drmini in aust
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PostPosted: Mon May 30, 2005 9:45 pm 
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Discs are made from cast iron. Some have a reputation for warping. Ford had this problem with the AU falcon.

Some are better made than others too- I once bought a Fiat one that had 2mm runout...! I took it back.

The best discs are left a while between casting and machining. This lets cooling stresses in the casting dissipate, less chance of warping after some heat & cool cycles..

I've had good results with Karcraft's S discs (from UK), also RDA and DBA ones. :wink:

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Last edited by drmini in aust on Mon May 30, 2005 9:46 pm, edited 1 time in total.

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Sorceress
 Post subject:
PostPosted: Mon May 30, 2005 9:46 pm 
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its a squeak on rotation.

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drmini in aust
 Post subject:
PostPosted: Mon May 30, 2005 9:48 pm 
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Sorceress wrote:
its a squeak on rotation.

Check the disc runout- usually this can be reduced (and the squeak fixed) by repositioning the drive flange on the CV.

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9YaTaH
 Post subject: Mice?
PostPosted: Mon May 30, 2005 11:09 pm 
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Sorceress wrote:
its a squeak on rotation.


You may have rodents in your front end....

Hmmm.....maybe you just glazed a pad being a little over exuberant....

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68matic
 Post subject:
PostPosted: Tue May 31, 2005 12:25 am 
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would your discs and something called "self adjusting calipers" have something in common? or not?

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simon k
 Post subject:
PostPosted: Tue May 31, 2005 10:53 am 
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Sorceress wrote:
its a squeak on rotation.


squeaks are usually caused by microvibrations between the piston and the pad, caused by brake dust getting inbetween them, they sell anti-squeak paste and other things for this reason. Minis are supposed to have anti-squeal plates in there, but most don't have them. I've seen a bit of silastic used to stick the pads to the pistons

could also be glazing as Mick has said

take the pads out, give them a clean back and front, wipe the piston faces down with a clean rag and see what it's like

warped disks would cause violent shudder under braking. They can warp or crack if you do a lot of heavy braking, and then stop without them cooling down under rotation

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