I have a 2003 EVO and that needs the rotors turned. I friend of mine is doing it but he needs to know the minimum rotor thickness for REAR rotors of an EVO. Please help!! thanks!

 

just a sugg. you should buy new rotors... cut ones do not last very long, esp. in higher demand situations..

 

The minimum thickness should be etched right on the rotor. I don't recall what it is off the top of my head though without looking, sorry.

 

anyone know the answer???!? I'm just turning the rotors once so I think it will be ok.

 

no one knows?? anyone work for mitsu and can find out?

 

no clue

 

call the local dealship maybe ?

 

Call Burshur Racing , That guy might know. They race the EVOs

 

From the SM:

BRAKE DISC THICKNESS CHECK M1351002400339
.
CAUTION
Take care not to contact the parts or tools to the caliper
because the paint of caliper will be scratched. And if there
is brake fluid on the caliper, wipe out quickly.
1. Using a micrometer, measure disc thickness at eight
positions, approximately 45 degrees apart and 10 mm (0.39
inch) in from the outer edge of the disc.
Standard value:
<Front> 32.0 mm (1.26 inch)
<Rear> 22.0 mm (0.87 inch)
Minimum limit:
<Front> 29.8 mm (1.17 inch)
<Rear> 20.4 mm (0.80 inch)
NOTE: Thickness variation (at least 8 positions) should not
be more than 0.015 mm (0.0006 inch).
2. If the disc thickness is less than the limits, replace it with a
new one.
CAUTION
• After a new brake disc is installed, always grind the
brake disc with on-the-car type brake lathe. If this step
is not carried out, the brake disc run-out exceeds the
specified value, resulting in judder.
• When the on-the-car type lathe is used, first install M12
flat washer on the stud bolt in the brake disc side
according to the figure, and then install the adapter. If
the adapter is installed with M12 flat washer not seated,
the brake disc rotor may be deformed, resulting in inac-
curate grinding.
• Grind the brake disc with all wheel nuts diagonally and
equally tightened to the specified torque 100 N?m (74 ft-
lb). When all numbers of wheel nuts are not used, or the
tightening torque is excessive or not equal, the brake
disc rotor or drum may be deformed, resulting in jud-
der.
3. If thickness variation exceeds the specification, turn rotor
with an on-the-car type brake lathe ("Accuturn-8750" or
equivalent).
If the calculated final thickness after turning the rotor is less
than the standard value, replace the disc.

 

Min (rear) 20.4mm

Micrometer around 10mm from outer edge, 8 positions 45deg. apart. Thickness should be less than 0.015mm and total runout twice that.

I advise you grind it as opposed to turning it on a lathe.

--- ahh somebody beat me to it---