Brake Squeal, after track event Options

[srb7f]

So I finally made it to my first track event with the 914 last week. A driver's ed, with my dad and his Honda S2000. Anyhow, I had an absolute blast, but hit the brakes harder than usual.

The front brakes are now squealing just as I apply the brakes. It goes away with more firm pressure on the brakes. They still work fine, but the squeal is like nails on the chalkboard.

I took the wheels off quickly over the weekend, took the pads out (there's plenty left), cleaned the dust off, and put things back together with no improvement at all. Calipers bolts are nice and tight. I do have the 320i brakes on the car.

I did notice that the pistons seem to have spun around a bit in their bores. I don't have any of the metal shims like the 914 front calipers have, and frankly I'm not sure that I'm even supposed to. I've had these brakes on the car for years, without problems until now. Would this cause squealing?

I think this weekend I'll also check the play in the front bearings and tighten as needed. Would this cause it?

Is there anything else I should check or do? Also, if all of this fails, I know there's a bunch of anti-squeal sprays, pads, etc. Which of these (if any) actually work?

Thanks, in advance,


Steve