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View Poll Results: Toss or turn?
resurface 0 0%
trash 'em 6 100.00%
Voters: 6. You may not vote on this poll

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Old 04-27-2008, 02:21 PM   #1
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Default Old Brake rotors - Turn or toss?

I installed Brembo rotors and Hawk pads this week, installation went easily. The Brembo rotors were Made in Mexico and don't appear to be quite as heavy as the Napa rotors they replaced. Weight of the Brembo rotors is about 16 pounds each. Broke in the pads according to Hawk'* directions Stopping is smooth but I won't be pushing them for the first 100 miles or so. Hopefully they are gentle on rotors as advertised.

On the old rotors the discs were a discolored blue over most of the braking surface (except at edges). On our Porsche 968 with Zimmerman rotors the braking surface is universally bright, no blueing). As you can see in the photos, three of the four surfaces had the blue discoloration, while one looked normal. Is this due to dragging pads, or is it nothing to worry about? The old pads were barely worn. I wonder if they contributed to the warping of the rotors.
The rotors were barely worn as well, should they be turned or discarded? Must be the frugal side of the family that hates throwing away anything that looks almost new.

What would cause the Blueing of the rotors? Comments?
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Old 04-27-2008, 02:27 PM   #2
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I was always under the impression that having them turned after they are already warped doesn't ultimately fix the problem. But I have heard of places that turn rotors at a very cheap price, which isn't a bad deal and can get rid of the brake pulsing you may have gotten prior.

I had a dealership quote me $150 to turn two rotors once. I'd rather buy new ones in that case.

I didn't vote b/c it would depend for me.
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Old 04-27-2008, 03:32 PM   #3
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i would definitely trash those, unless you are in need of an anchor, cuz thats about all they're good for.

the tolerances from new to the spec refered to as "turn to" which is where they should be at when the cutting is done, are extremely narrow on our cars. they dont provide much room like they used to.

and also, if you cut them, you are obviously removing material, which slightly lowers the rotors' ability of dissapating heat. And for our cars having undersized brakes for my liking, i would much rather buy new rotors than cut the old ones.
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Old 04-27-2008, 04:02 PM   #4
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New rotors cost only a little more then turning them. I say put them on the shelf incase you need one on the quick. Something only as a temp install.
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