Rotor runout Options

[Olympic 914]

As one of my winter projects.

I had a slight pulsing in the brake, really only feel it just when coming to a stop. no noticeable pulling to either side.


So I hooked up the dial indicator to check the rotor runout. rears were .004 and .005
right front was .004 left front was .016

For what its worth I am running 911SC struts with A calipers. the rotors are separate from the hub. i did carefully torque the new rotors down to 18ft lbs in a star pattern when installing them.


Thinking I have found my Smoking Gun in a warped rotor, I ordered 2 new front rotors and new pads, although the old pads only had 16K on them and still looked very good. Figured new rotors get new pads.

So I get the left side back together today and was working on the right side, when I got the idea to check the runout.

Well wouldn't you know it the left side with a NEW rotor had .016 runout. WTF??

Right side back at .004, same as before.

any one have this kind of problem before?

the only thing I can think of is, when I installed the bearing races back when I first put them on, one of them wasn't seated all the way. or somehow got in there slightly crooked.

guess I will take it back apart and try to drive the races in further.

we shall see what happens.