dspcole

When doing a routine brake pad change do the rotors need to be turned?

hatchetf15

No turning of rotors. Replace rotors for new when at wear limits.

sasilverbullet

What hatchet said, don't turn these rotors. That's from someone that was trained at the 4 yr Porsche mechanics school in Stuttgart.

KNSBrakes

You will be hard pressed to find someone that turns rotors, especially someone that's willing to turn a drilled rotor.

Measure thickness. If you have brake "judder" then replacement might be your only option.

--Aaron

Woodman71

I didn't even know turning rotors was still a thing...

sasilverbullet

Before you replace the rotors, re-bed the pads in. Quite a few times I've fixed this symptom on cars by re-bedding the pads in.

Porschetech3

I have machined them before but only on "like new" rotors that only needed a very fine cut........the wear limit is 1mm per side so it doesn't take much wear to be beyond the wear limit so turning them is almost never possible and stay within the wear limit spec..

KNSBrakes

Here you go-

https://www.centricparts.com/media/t...c-8-2018_1.pdf

--Aaron

Porschetech3

TexSquirrel

I have recently priced used brake lathes(I tend to do that once a year) and at today's rotor costs for most domestic and Asian vehicles it just didn't make sense.
The space the brake lathe takes up is another concern.
I can either have a tire machine or a brake lathe, not both.
I typically replace rotors when replacing brake pads.
I might skip replacement on a Porsche once, if the rotor is still within spec.
The tire machine keeps getting put off, but I might have one before too long.
I get many requests for tire mounting and balancing.
A lot more than I get rotor/drum turning.

Flyfishnick

Salsilverbullet is correct and saved me $$$$ with that advice and it worked for me. I never knew about re-bedding the pads until then.

GC996

Unless your rotors are worn to the point you need to replace them, just replace the pads and bed them in. The oem brake system is incrediably tough and durable made by Brembo. Your oem rotors will last longer than your oem pads. If you haven't replaced your brake fluid in a long time it would make sense to do it.