[200q20v] UFO's

[Kneale Brownson]

The warpage most commonly results from deformation after being heated up by 
heavy braking.  It's been my understanding from reading about these brakes 
here that they warp particularly if you sit with the pads pressed against 
the rotors at stops after the rotors have been heated up from heavy 
braking.  It's been reported here that if you go out and heat them up well, 
as in a bunch of hard braking from 80 mph with the brake pedal lightly held 
down while accelerating back up to 80, and then drive a ways with NO 
braking so the rotors can cool down, you may reduce or eliminate the warpage.



At 01:08 PM 08/10/2001 -0400, Mark Trank wrote:

>Fellow listers:
>
>I've had my 91 200q for approximately 18 months now.  Recently I have
>experienced a brief shudder when applying brakes (UFO's) at  higher speeds.
>Following the various posts since joining the list, I think I know what's
>going on.  I would like to postpone brake replacement as long as possible,
>since braking functions well under most circumstances, though if the rotors
>are showing signs of warpage I guess its simply a matter of time.  Is this
>advisable?  Or am I looking at more serious consequences down the road if I
>wait?
>
>Part 2:  what are the advantages to cryo-treating the rotors?  What expense
>is involved?
>
>I understand that my rather open-ended question calls for speculation, but
>who better to speculate than y'all who have BTDT?  Seriously, any insight or
>advice you can offer would be much appreciated.
>
>TIA,
>
>Mark
>91 200q20v 88k miles
>
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