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Do you see any issues with these rotors?

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Do you see any issues with these rotors?

 
Old 03-13-2019, 08:03 PM
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EuG
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Default Do you see any issues with these rotors?

Hi,

I'm considering picking up this very low mileage (less than 5K miles) Z06 with Z07 package.
Here are the pics of the rotors. Do they look good to you?






Any evidence of track use?

Thanks,

Last edited by EuG; 03-13-2019 at 08:04 PM.
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Old 03-13-2019, 08:46 PM
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Mr. Gizmo
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Drive the car and make sure there are no shudders or vibrations. Some z07 or j57 ceramic brake equipped cars have a mysterious vibration cruising at light throttle between 60 to 80mph . It was prevalent on the c6zr1ís as well.

As as far as looking at the pics itís hard to tell. I would crawl all around under the car. You can tell if itís been tracked if there are scuffs or marbles(flecks of rubber , pebbles or asphalt) deposited up underneath the car. If the car is a z07 and still had the original cup 2 tires at 5k miles it probably hasnít been tracked.

tracked cars even with a few miles have chips and road rash on the lower panels thatís very noticeable

Last edited by Mr. Gizmo; 03-13-2019 at 08:48 PM.
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Old 03-13-2019, 08:55 PM
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Rotor weights would be nice parameters to know prior to purchase. For the sake of argument, a couple of track days isnít very concerning for these rotors unless rotor weight is close to minimum, assuming your intended use is street driving.
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Old 03-14-2019, 09:18 AM
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EuG
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The car is out of state.
I'm just doing as much due diligence as possible before I commit to flying out to check it out in person.
The tires were recently changed.

Also from CARFAX report I see that at around 1,700 miles

04/2015 at ~500 miles - Oil and filter changed
then
08/2015 at ~1,700 Brake fluid flushed/changed. Oil and filter changed

What should I make of it?
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Old 03-14-2019, 10:16 AM
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I wouldn't read too much into the Carfax report, to me it sounds like the person was meticulous about service and having it done at the dealer. If they were serious track people, they probably would be doing the service themselves as the dealer would be very expensive. Seeing the car in person is really going to be your best way of telling. You might even find a local expert to look at the car either before, or when you are there.
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Old 03-14-2019, 01:29 PM
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TXshaggy
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Originally Posted by EuG View Post
The car is out of state.
I'm just doing as much due diligence as possible before I commit to flying out to check it out in person.
The tires were recently changed.

Also from CARFAX report I see that at around 1,700 miles

04/2015 at ~500 miles - Oil and filter changed
then
08/2015 at ~1,700 Brake fluid flushed/changed. Oil and filter changed

What should I make of it?
That in Aug 2015 he was heading to the track and oil hasnít been changed in almost 4 years.

Last edited by TXshaggy; 03-14-2019 at 01:30 PM.
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Old 03-14-2019, 02:13 PM
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EuG
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Originally Posted by TXshaggy View Post
That in Aug 2015 he was heading to the track and oil hasnít been changed in almost 4 years.
This was just an excerpt, not complete CARFAX.
This was the last 2 entries for the 1st owner.
Since then, the car was sold and 2nd owner had it for about 3.5 years, put on only like 2,500 miles and oil was changed very regularly actually:

06/2016: 25xx miles - Oil and filter changed

03/2017: 30xx miles - Maintenance inspection completed.
Sensing and diagnostic module reprogrammed
Oil and filter changed

04/2018: 39xx miles - Oil and filter changed
07/2018: 40xx miles - Maintenance inspection completed
Two tires mounted
Two tires replaced
Tire(s) replaced
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Old 03-14-2019, 02:53 PM
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TXshaggy
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Manual states 1500 miles before track use, can think of no other reason to flush new brake fluid except heading to the track.
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Old 03-14-2019, 05:41 PM
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Bill Dearborn
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Originally Posted by EuG View Post
Hi,

I'm considering picking up this very low mileage (less than 5K miles) Z06 with Z07 package.
Here are the pics of the rotors. Do they look good to you?






Any evidence of track use?

Thanks,
No evidence of track use with those brakes. Rotors look good and pads sort of look like somebody did the proper brake burnishing required in the OM. The calipers are clean. Extended track use gets them pretty dirty even when using ceramic pads it is hard to clean the dirt off the paint. There is no track dirt burnt into the paint in the notches under the word Brembo and I doubt you will see it around the bleeder screws and other places it gathers.

However, somebody could replace the rotors. Another place to check for track usage is the wheel well liners. The liners like to gather all of the track turds which tend to melt into the felt like surface of the liner. When you try to clean the rubber out it smears and becomes a line on the liner Vs a blob. Look in both front and rear wheel wells.

Track turds also like to gather in all of the little edges under the car (like the edges of the floor board supports). Any other sharp edge or a slot between two panels stands to collect the turds as well. They go everywhere and it can take a pretty concerted effort to clean them out of the car. Wheel well liners usually end up being replaced Vs cleaned.

You do know that a low mile garage queen car may not have been taken care of as well as a tracked car which probably saw lots of service and inspections. Sitting around abuses the cars while operating them within their operating parameters doesn't abuse them. They aren't designed to sit.

Bill
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Old 03-14-2019, 06:51 PM
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ask to see the wear indicator just in case.
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Old 03-15-2019, 10:34 AM
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Thanks for replies guys! I appreciate the info.
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Old 03-15-2019, 02:59 PM
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Originally Posted by trevor90 View Post
ask to see the wear indicator just in case.
That is pretty involved for a car purchase. It means pulling each of the wheels and looking inside the wheel wells to see the top of the inside brake pad and if you don't know what you are looking at doesn't really tell you much.

Bill
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