> >I've also heard a theory that it's caused by sitting with your foot on > the brake after heavy braking. (The theory being that the rotor cools > differently where it's clamped by the caliper.) Personally, the only > warped rotor I've had was done in by a draggy caliper, so heating was > definately the culprit there. > > This can definitely warp the discs, keeping foot on brake after a high speed > braking session, or multiples thereof, don't forget they're glowing red > after a a few fast roundabouts (90 - 40), 90 - 40 and then 90>0 in a 1 ton > vehicle (and if you have roundabouts there.) I'd add to this that although I doubt overtightening the wheel nuts (lugs, I ask you!) causes disc warping on most hub designs, its remotely possible that a corroded/dirty hub face contact might. Touch the wheel after a lot of hard braking - a very large heat sink like that milling in the wind and it can still get pretty hot, especially with binding brakes. Cleaning the back face of the wheel and hub mating face would avert this (slight) risk. Much more likely is the one above (holding foot on brake after stopping) and also of course binding brakes. Automatics would also be more prone, as the brakes are required a lot more - but I wouldn't touch one with barge-pole - so I'm alright Jack. Clive Smith '88 Syncro Transporter |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.