IMO I would disassemble the rotor.
Check the bearing seat, caliper bolts, and spindle.
You got something that's not sitting right.
Clean everything, remove pads and see what you have.
A warped rotor could do this.
Lay it on a good flat surface and use your dial indicator to see if it's
flat.
You must have one if you checked the run out that close.
-----Original Message-----
From: spitfires-owner@autox.team.net [mailto:spitfires-owner@autox.team.net]
On Behalf Of jkekenj
Sent: Wednesday, March 24, 2004 8:10 PM
To: spitfires@autox.team.net
Subject: Rotor Runout '74 Spitfire
While checking out the breaks on my 74 Spitfire, I noticed that the driver's
side rotor was not turning freely.
It appeared that the rotor was wobbling. In one section, with no break pedal
pressure, it was extremely hard to turn the rotor.
So, I decided to measure the run out.
Drivers Side Rotor Run out = 0.019
Passenger Side Rotor Run out = 0.004
Could anyone tell me what the acceptable tolerance is?
Any opinions as to where the run out is coming from? The previous
Owner must have replaced these rotors since they and the break pads
do not appear to show any wear. Can the rotors be replaced incorrectly
to cause this much movement?
Jim K
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