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same measurement
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I measured from the center of the rotor to the non existent lip that they create and it was the same measurement.
Leading evidence: 'same measurement' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'same measurement' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check holes in the rotors fro cracks' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Here is what a well used rotor from my brembo big brake kit looks like on my 996.2.
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Suspected cause
Being a Dealer Tech since 1974 I'm probably a little bias, and I agree that Dealer Techs are a lot younger nowadays than in decades past......The Dealers I have worked for were where all the cars that "couldn't be fixed" ended up to be "fixed"...
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Suggestion
Check the holes in the rotors fro cracks, which is common for drilled rotors.
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Suggestion
If you run your fingernail from the inside to the outside of the rotor and it catches, that is also a sign the brake pads are not aggressive enough for your driving style.
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Suggestion
When holding calipers, use your thumb and finger on either side of the caliper jaws to squeeze the jaws shut and your other hand to lightly support the calipers.
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Suspected cause
Being a Dealer Tech since 1974 I'm probably a little bias, and I agree that Dealer Techs are a lot younger nowadays than in decades past......The Dealers I have worked for were where all the cars that "couldn't be fixed" ended up to be "fixed"...
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Check the holes in the rotors fro cracks, which is common for drilled rotors.
Also, warping can be another cause for rejecting them.
Lastly, I would move the calipers down so that the inside neck of the caliper arms are over the outer rotor ridge. You don't want to measure that ridge, but the rotor face.
When holding calipers, use your thumb and finger on either side of the caliper jaws to squeeze the jaws shut and your other hand to lightly support the calipers.
With all due respect, you should use a micrometer on the rotors and not calipers. There can be a raised lip on the outside edge of the rotor that will interfere with the measurement of the part of the rotor in touch with the pads. On the other hand, those rotors and your measurements don't indicate much of an issue with the thickness.
it was measured on the rotor. I measured from the center of the rotor to the non existent lip that they create and it was the same measurement.
Picture for reference
Most aftermarket brake pads are not going to come with the shim Porsche originally used. The shim varies by year model but its a oddball design with round inserts that fit into the brake pistons.
These shims require you to remove the caliper to change the pads.
All race pads have none of this and it makes changing pads a 7 minute ordeal.
Rotors do not warp- brake pads get too hot and melt, causing an uneven transfer of molten brake pad material to the rotor which you experience as a shake in the steering wheel (or in the seat). You can try to use a brake rotor hone to remove this material but it's a waste of time IMO.
If you run your fingernail from the inside to the outside of the rotor and it catches, that is also a sign the brake pads are not aggressive enough for your driving style.
In the world of braking you always get what you pay for.
--Aaron
Your rotors look brand new.
Here is what a well used rotor from my brembo big brake kit looks like on my 996.2. Notice the lip on the edge of the rotor. Pagid yellow pads have chewed the rotors down. I have one more track day and I will replace them. Looks like I need to shine up my floating hats as well.
Unless there is something the pictures aren't showing, you got a lot of miles left on those rotors.
I would assume the Dealer Tech knows what a new rotor looks like....
Being a Dealer Tech since 1974 I'm probably a little bias, and I agree that Dealer Techs are a lot younger nowadays than in decades past......The Dealers I have worked for were where all the cars that "couldn't be fixed" ended up to be "fixed"...
But, do you have any noise when applying the brakes at different pressures??
What I would refer to as "pad slap" would be a noise caused by the surface of the rotor pulling the pad away from center and into the "spring" then "slapping back" to the inner stop..
This is usually caused by the rotor finish being too course or "micro threading"...
If you have ever machined rotors on a lath, the last final cut has to be very light and slow..... if the last cut is deep and fast...then "micro threading" will happen and you will have this unusual noise at certain braking pressures....
If the noise is not too bad it will go away with some wear on the rotor ( the wear will smooth the rotor) ..but sometimes it could be dangerous if it is severe....
I would call the Tech and get clarification on the "pad slap"...for your own safety....( better safe than sorry) ...
I picked up a set of rotor calipers from Amazon. They're designed to clear the ridge. They've gone up $20.00 since I bought them in 2017 though.
https://www.amazon.com/gp/product/B006Y1OWKS/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B006Y1OWKS/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Something else that's cheap and handy are these brake pad thickness gauges. They were $10.00 in 2017 and now are $17.00. There's probably a cheaper version though. These go from 2mm to 12mm.
https://www.amazon.com/gp/product/B00OJG327E/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1
https://www.amazon.com/gp/product/B00OJG327E/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1
In the second pic, it does look like there is a bit of a lip there, if so the tiny notch in you caliper may not be clearing it (obviously needs to do so on both sides). Spec is 2mm total I believe, so you can gut check it feeling if the lip on either side is 1mm. Regardless, it�s hard to fathom that causing �pad slap�.
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