262mm Front brake rotors/Disc - To Machine or Buy new?

**Sexc86** · 27-09-2009 03:10 PM

Hey guys
Pretty much as topic states. Got A 96 Ek1 with 262mm Front brakes. They are starting to squeel quite bad (when the car is moving and brakes not applied) and not sure weather to have them machined or to purchase some new ones.

Aproximately.

Rotor thickness - 21mm
Rotor outside wear lip - 1mm each side
Actually rotor thickness on brake pads - 19mm

Any help would be much appreciated

Regards Lyle

**saikou27** · 27-09-2009 03:35 PM

if the rotors are not already at minimum thickness then just get them machined

**Sexc86** · 27-09-2009 03:58 PM

how do i know what the minimum thickness is?

**riruiz_88** · 27-09-2009 04:04 PM

its usually ~3mm from original thickness when new. thats what it says on the workshop manual im pretty sure

**91type-r** · 27-09-2009 04:06 PM

it will be stamped on the outside of the discs where the cooling vanes are.
if they are close to the minimum already would mean that you need new rotors as they probably wont clean up at the minimum thickness.

**Sexc86** · 27-09-2009 04:10 PM

thats what i thought.

just found out from dba stardard thickness is 23mm. minimum is 19mm.

looks like new rotors are in order

**91type-r** · 30-09-2009 07:30 PM

i have some barely used ones from my da9 that i fitted and then changed to slotted rotors. will sell them to ya for $100. not sure if they are compatible, would need to check the centre hub sizes.