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I’m trying to decide whether it’s time to replace the rings on my PFC rotors. I would rather not wait until they crack at the track, but I also don’t want to change them way early. They are nowhere near min thickness but there are these cracks that you can feel with your fingernail. If it matters, these are almost 10 years old, but the car is garaged. Thanks for any advice.
Yes, those rotors have seen better days. Way too many heat cycles. You got your monies worth
There are notes suggesting finger nail tests & cracks running to the edges etc. In this case, it appears its time to R/R those. Better safe than sorry.
$$$Imagine blowing a rotor on the track$$$
Last edited by MinusPrevious; Mar 26, 2019 at 07:35 PM.
Yes, those rotors have seen better days. Way too many heat cycles. You got your monies worth
There are notes suggesting finger nail tests & cracks running to the edges etc. In this case, it appears its time to R/R those. Better safe than sorry.
$$$Imagine blowing a rotor on the track$$$
I agree with Minus. Once you start forming deep cracks like that it'll create a cascading effect as it cracks more and more very quickly. I wouldn't chance it.
The little more surface cracks would be fine. But the bigger ones that you can probably fit your fingernail in and look 1-1.5" long are what make me say replace them.
Mar 26, 2019, 03:23 PM
. Way too many heat cycles. You got your monies worth 
