disk rotor match marks?

I took off my front rotor's to do some cleaning since I already had my calipers off. In the repair manual info I got from alldata, it said to use the match marks for re installation. I couldn't find any match marks on the axle hub or the rotors, so I just installed them in any position.

The repair manual I got was for a 2013 and my truck is a 2014 model year. Maybe the 2014's don't have match marks?

I should have marked it with a sharpie before I took it off, but is there any negatives to attaching the rotors in a different position? Other than that it drives fine, no unusual vibrations.

Thanks

 

No match marks. You are good to go.

 

Granted it shouldn't make much difference at all, but the manual does say to install matching up the match marks.

What you can do is do what they do when replacing the rotor with a new one.
You will need a dial indicator to check it.

Here is what the service manual says:

When replacing the disc with a new one, select the installation position where the disc has the minimum runout.

 

^Does anybody actually do this?

 

Does that only apply to new rotors or old ones too?

Lol Im interested in doing this, any excuse to buy new measuring tools!

 

Of course not. Even if it is the correct method.

 

New or used rotors, it doesn't matter. That is what the match mark is all about they should be set for minimal runout from the factory...

 

It would intuitively depend on the condition of the parts. The hub flange and the brake disc hat are both machined surfaces. The disc itself is typically parallel-ground. So if you are assembling a new disc to a new hub, the runout can be expected to be negligible. If the hub is old and the flange has a lot of corrosion, it can be sanded down.