When having the rotors on your car replaced, ask for a higher quality metal type of rotor. Inferior types can squeak and not dissipate heat well, causing problems sooner than you'd expect them to.
A rotor must be replaced, instead of resurfaced, once the thickness specifications for the automobile and rotor brand are not being met. In Addition, if a rotor is cracked, warped, already resurfaced, or otherwise damaged it must be replaced. Many times drums, pads, and other automobile parts will have to be replaced if the mechanic sees problems once the old rotor is removed. A rotor replacement should not take more than one day and should not cost more than $100 for parts and labor at home, or over $400 at a repair shop.
When they are about 3/4 worn before scoring and damage to rotors occurs
You should have your rotors checked and possibly turned or replaced as necessary You should have your rotors checked and possibly turned or replaced as necessary
YES, the pads should have been replaced at the same time you replaced the rotors.
Yes. You should also get a second opinion from another mechanic before buying the job.
When they are warped or worn beyond legal limits.
I recently got a quote for my 2003 Kia Optima brake pads & rotors to be replaced in the rear and it came to $183 before taxes. This price is to replace both pads and rotors completely. Usually rotors don't cost much to be turned.
Break pads should be checked if not replaced. Check condition of rotors at the same time.
Not usually required but recommended. If the surface of your rotors have any grooves or gouges, then yes definatly have them "turned" at a shop or replaced. If your brake pads are replaced regularly then you should be fine.
Depends entirely on the make and model.
your brake rotors are warped. You should repalce you brake pads and have the rotors resurfaced if possible, or replaced.
Your rotors had the grooves before, from the old pads. You should have had them turned. Next time check rotors at time of fitting new pads. If you can see or feel grooves then they should be repaired.
They could if worn or warped to the safe and legal limit.