goldtaco9

OK, I have my new rotors on order for my '00 4Runner.
Do I need to do anything special with them prior to installation?
The last time I replaced rotors, (a long long time ago in a galaxy far......), I only needed to wipe them down with mineral spirits, bolt 'em on and replace the pads.
Is that all there is to it?
Do I need any special tools?
I think that my regular wrench told me that he cuts new rotors. Why would he do that?
Thanks,
Mike

4RUNR

No cutting, just wipe off the oil and put 'em on. Give them a kiss maybe so they don't warp

Bennito

Ooooh they must be aftermarkets or original toyota.

I went with a wipe down and called it good. Only 5k or so since install, so who is to say about long term effectiveness.

The real reason I only went with a wipe down is that I have no idea how you'd "cut" a rotor. Can you impart some wisdom on me?

foxtrapper

I think you've misunderstood your wrench. It is a good thing to carefully hit them with a sanding disc, imparting a swirl patern on them. This helps in break in and wear. But it's a high speed thing. Given the speed most folks drive their 4x4's, especially on this board, it's not going to matter.

SLC Punk

I agree, I always did this when I was working for Firestone.

86toyota

I think the reason for cutting the new rotors is that they are a two piece design.The old rotor has be seperated from the hub,and when tightening the new rotor onto the hub it may be not running true anymore,depending on how it was torqued down.The theory now is that by cutting it ,itwill not pulsate while breaking in the pads.

toy283

Back when I was a parts salesman (early 80's) rotors needed to be turned before installation. This was because the rotors were manufactured oversize to account for anticipated warping while in storage. Newer manufacturing techniques have largely eliminated the need for this. I've checked runout on a new set of rotors on more than one occasion and would concur.