Should I replace rotors in pairs? One of my rear rotors has become chewed beyond use do to a stuck caliper slide so I need to replace it. The other rear rotor is in fine shape with about 30k miles on it. I am replacing the pads on both sides but, do I need to replace the rotors on both sides to? Im getting conflicting advice on what to do and dont want to spend money where not necessary.
Thanks.

 

If your talking about original rotors, i would say do both at this point.

 

I replace rotors in pairs, then the next replacement for both is on the same timeline. IMHO, can you get by with doing 1, yes but it's not like a rotor costs $1K.

 

Rotors aren't that expensive, but if you dont replace it then I'd atleast get it turned. With 30k and it being in the rear, just getting it turned is probably fine (in my opinion).

 

thanks for the replys, all rotors replaced 30k and 4 years ago, so the other rear still looks good. Just trying to be cheap and save that extra $50

 

IMO I would turn both the rotors on same axle in a lathe to clean them both up to about the same thickness, say, within 0.010" to 0.015" to avoid any brake snatching. Also check the minimum thickness for brake rotors, it's listed in the RAVE manual.

 

Just replace 1 rotor, 1 caliper, and pads on both sides. It's fine.

 

ok thanks! Replaced both had to really pry against the rotor to get wheel off, it had really bonded to the rotor. With all the prying it scarred the old rotor up a bit.

 

If it was the front I would say only ever replace them in pairs and don't waste money on getting them skimmed/turned. For the rear, the wear on the good one is likely to be minimal and the load on them in use is also minimal so replacing the bad one alone is probably Ok

 

A smear of copper grease on the rotor face or the rear of the hub and locating center boss ensures they always release easily. I always use it on the lug nuts and studs also but many say don't but it's never caused me a problem in 12 years.

Alternatively use motorcycle chain wax spray as it isn't affected by to much by heat and water, I use either Castrol or Wurth a lot everywhere.