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TurboRA28
Forums Junkie

Location:
Terrigal
Registered:
May 2002

Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 03:41

Hello, just wanted to find out if warper brake rotors can be machined straight again or if they need to be replaced? Thanks Joel [Report message to a moderator]

81LOWLUX
Regular

Location:
BRAY PARK BRISBANE
Registered:
March 2005

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 03:45

depends on how muck meat you have on them and how bad they are, generaly yes. [Report message to a moderator]

thechuckster
Forums Junkie

Location:
Brisbane
Registered:
February 2003

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 03:47

depends on how much you have to machine off to bring back to true? but if the hat/mounting parts have also moved/warped then it might be safer/cheaper to chuck it as you might not get a long life out of it. [Report message to a moderator]

rob_RA40
Forums Junkie

Location:
c'town, NSW
Registered:
May 2002

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 03:48

check dba catalogue for minimum thickness specs, talk to brake machinist guy make sure only the friction area is warped and not the inner hubby bit (teknikal termin0l0gy) chuckster beat me to it, i dunno about his terminology tho [Updated on: Wed, 23 March 2005 03:49] [Report message to a moderator]

thechuckster
Forums Junkie

Location:
Brisbane
Registered:
February 2003

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 04:08

... terminikonolgy is for smart fella's [Report message to a moderator]

TurboRA28
Forums Junkie

Location:
Terrigal
Registered:
May 2002

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 04:21

haha thanks guys the terminikonolgy helped a lot too. I'll pull them off next week and drop them into a brake shop to see what can be done. [Report message to a moderator]

gianttomato
Forums Junkie

I supported Toymods

Location:
I renounced punctuation
Registered:
May 2002

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 06:04

Really warped? Usually 'warped' rotors are just due to resin buildup on the rotors. Can be emeried off or a few solid applications of the brakes will suffice. Also certain pad types are prone to dumping resin on rotors looks in the direction EBC Green stuff. [Report message to a moderator]

TurboRA28
Forums Junkie

Location:
Terrigal
Registered:
May 2002

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 06:10

They are pretty warped! If rolling slowly with moderate pressure on the peddal you can feel it slowly sinking down & up. Also up on jack stands when I turn the rotor I can feel it getting tighter. I brought the brake setup secondhand and it's always been like it. Just been putting up with it but thought it was about time I sorted it out. [Report message to a moderator]

gianttomato
Forums Junkie

I supported Toymods

Location:
I renounced punctuation
Registered:
May 2002

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 06:16

Pulsing could still be due to resin. Before you get too carried away, check for runoff with a dial indicator. Try mounting the rotor in a different position relative to the hub as this may solve most of your runoff issues (if you have any). Otherwise machine away. [Report message to a moderator]

allencr
Regular

Location:
tallahassee FL usOFa
Registered:
May 2002

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 17:33

Yes, and much more then most will let you, because the minimum thickness is set by lawyers, not engineers. a thin drum is risky since you're trying to expand it, but a disk/rotor isn't dangerous until it's super thin because it's being compressed. i think those "minimums" are almost twice what they can be. i've never seen any "resin" that had the same symptoms and/or didn't disappear when used a little. Also, try the e-brake! it may be your rears! [Updated on: Wed, 23 March 2005 17:34] [Report message to a moderator]

sonwill
Regular

Location:
Lara, Vic
Registered:
February 2005

Re: Warped rotors - can they be machined or have to replace?	Wed, 23 March 2005 22:37

I got some almost new AE82 rotors (6mts old) if they fit. [Report message to a moderator]

OldSchoolRolla
Occasional Poster

Location:
Melbourne
Registered:
January 2005

Re: Warped rotors - can they be machined or have to replace?	Thu, 24 March 2005 01:56

A friend of mine got new pads n a light machine on the rotors......wen he got the car bak the pedal was vibrating up n down bad wen depressing the brakes... so we took it bak n the shop gave them a machine again taking off abit more than the first time. It was fine for a few months then the pedal started getting that up n down feeling wen braking lightly, id probly b getting new ones if urs are way gone...... [Report message to a moderator]

TCHOON
Regular

Location:
Sydney- Sutho Shire &...
Registered:
June 2002

Re: Warped rotors - can they be machined or have to replace?	Thu, 24 March 2005 10:20

Article on the myth of warped rotors. http://www.stoptech.com/whitepapers/warped_rotors_ myth.htm It would be easy for me to pass off my badly vibrating brakes as 'warped' instead of admitting that I didn't tighten up one of my front wheels properly and it stuffed the rotor.. Tim. [Report message to a moderator]