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Cogito Ergo Sum
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Warped brake rotor...
I seem to have warped one of the Rotors I bought new from Pelican in August...
 Is there any way I can fix it or is it a boat anchor now? Its got like 4k on it....
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01-03-2010, 10:14 AM
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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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You'll probably get more responses on the 944 forum, but....
It's my understanding that you can turn the NA rotors, if it's not warped too bad. Remove it and take it to your local NAPA. We're talking under $100 for the work.
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Some Porsches long ago...then a wankle... 5 liters of VVT fury now -Chris "There is freedom in risk, just as there is oppression in security." |
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01-03-2010, 10:22 AM
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Cogito Ergo Sum
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Woops... Its on my VW... Little bitty bastard.....
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01-03-2010, 10:47 AM
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Used to be Singpilot...
Join Date: Oct 2006
Location: Sioux Falls, SD is what the reg says on the bus.
Posts: 1,867
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Solid or vented? The only real way to know is to check runout. Can be done on the car, and a spec book will have the number. By the time you factor in the R&R (even yours) and the shop labor (you will want to do both of them) it might make more sense to live with it, or buy again.
Most warpage is from holding the brake after a 'vigourous' slow/stop. The heat of the caliper adds to the contact patch heat and warps that section only. Most airlines prohibit parking brake after a landing or rejected T/O for that reason. Good luck! |
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01-03-2010, 10:55 AM
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Cogito Ergo Sum
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It shudders the whole car under braking is the only problem. I'm still trying to figure out how it got warped... I don't use the p brake when I know I've had the brakes hot... I'm not finding them on Pelican anymore... I only gave like 30 bucks for it IIRC. Now it looks like one is about 80 b/c Pelican doesn't have them...
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01-03-2010, 11:03 AM
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Super Moderator
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Warped rotors are very VERY rare (more of a myth really). More than likely it's uneven deposition of pad material. Burnish them very good with a whizzer or put in some aggressive compound brake pads. Make a few hard stops. Should cure it.
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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01-03-2010, 01:31 PM
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Cogito Ergo Sum
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Explain burnish with a whizzer please.
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01-03-2010, 01:33 PM
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Registered
Join Date: Jul 2006
Posts: 668
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I think he means you should pee on them.
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01-03-2010, 01:50 PM
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Dog-faced pony soldier
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I agree. It takes an absurd amount of heat to warp the rotors. 944 rotors are pretty stocky too - even the n/a ones.
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A car, a 911, a motorbike and a few surfboards Black Cars Matter |
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01-03-2010, 02:15 PM
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Cogito Ergo Sum
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Jeff.... Its on a Corrado.....
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01-03-2010, 02:15 PM
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Registered
Join Date: Jul 2005
Location: Reno, NV
Posts: 5,941
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Sid, regardless of what it's on,, you should go out and do some "spirited" starts/stops,, you can wipe the crap that's on them off. you might want to get a can of the spray on abrasive for brakes as well ...
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"Todd" 98 Tahoe ,2007 Saturn Vue 86 930 black and stock, 80 930 blue tracdog 91 Spec Miata (yeah I race a chick car) "life"ll kill ya" Warren Zevon |
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01-03-2010, 04:58 PM
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Cogito Ergo Sum
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So I need to go test the ABS?
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01-03-2010, 05:00 PM
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Platinum Member
Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
Posts: 21,033
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01-03-2010, 05:09 PM
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1986 Porsche 944 2.5l
1970 Porsche 911 S 
