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Old 07-23-2015, 05:58 PM   #1
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Rotors: Replace or Resurface?

Hi guys. I'm hoping for some help here. I'm hearing "replace" from the Brake shop and "resurface" from my friend.

Which is it?
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Old 07-23-2015, 09:01 PM   #2
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When I used to work at a parts house we would mic the rotors to see how thick they were. If they were still well within a ways from the minimum we would resurface them. Or you could just use this as a chance to upgrade to better pads & slotted/drilled rotors!


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Old 07-23-2015, 09:47 PM   #3
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Here's how I look at it.
Replacing is always better.
Compare cost between resurfacing and replacing.
Also consider how much material may have to be removed if resurfaced. For example, are they badly scored.
Thinner, resurfaced rotors, I believe are more prone to heat problems when hard breaking.
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Old 07-23-2015, 10:20 PM   #4
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Modern car rotors are made of better materials than old ****boxes and thus, the rotors need less steel as thermal mass to transfer the heat away. They are also, thus, not really up for a resurface as any cut will take them to minimum or below.

These modern, lighter rotors make for less unsprung mass which benefits handling.

Modern car? Buy new rotors. Old car? mic and cut is there is still enough there.
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Old 07-23-2015, 10:24 PM   #5
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Not knowing anything about the brake shop guy, or your friend, I think that I would take the advice of the guy who has the micrometer to measure the rotors and make sure that they are going to still be within the allowable minimum thickness. It would probably be wise to not "second guess" the person that is responsible for ensuring that your brakes are repaired correctly...
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Old 07-23-2015, 10:54 PM   #6
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REPLACE. Order your own rotors and pads. Your mechanic may want to replace them and sell them to you also.

Power Stop Mustang Brake Rotor & Pad Kit - Front & Rear K5943 (11-14 GT) - Free Shipping

After 50 posts, you can get 6% discount from American Muscle and Free Shipping!
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Old 07-23-2015, 11:21 PM   #7
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Quote:
Originally Posted by 5LHO View Post
Modern car rotors are made of better materials than old ****boxes and thus, the rotors need less steel as thermal mass to transfer the heat away. They are also, thus, not really up for a resurface as any cut will take them to minimum or below.

These modern, lighter rotors make for less unsprung mass which benefits handling.

Modern car? Buy new rotors. Old car? mic and cut is there is still enough there.
That's exactly right. My father told me the same thing, I still took my rotors down to a shop close by and they repeated the above. I'm used to older rotors, but these new ones are too thin to resurface and be safe, AFAIK.

Better to just buy new ones.
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Old 07-23-2015, 11:25 PM   #8
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I agree with all above. I was certified in brakes in the 80s. I see some rivets cutting into the rotors. If not for that I might try to save them.

Times have changed, buy new ones.


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Old 07-24-2015, 07:18 AM   #9
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Thanks guys, this is a huge help! I'm going to order a Power Stop Z23 Rotor/Pad kit from American Muscle this morning.
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Old 07-24-2015, 08:28 AM   #10
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Another thought...Do the work yourself and you save the cost of the new rotors in labor savings. Anyone can do brakes.
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Old 07-24-2015, 08:52 AM   #11
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Definitely going to do the install myself and save a couple hundred bucks. Already confirmed Auto Zone has the caliper tool for loan. Looks like Wednesday is gonna be brake day!
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Old 07-24-2015, 09:13 AM   #12
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good call. I tend to suggest that unless you have a lathe to do it yourself is just replace them.
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Old 07-25-2015, 10:43 AM   #13
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i work for a police fleet dept. and we never turn rotors anymore.we just swap with new ones.see what powerstop rotors and hawk pads will cost on that beast.thats what i put on my 01 newedge and the combo perform great.nice and quiet when breaking.when it comes to brakes,its better safe than sorry for you and everyone around you.and it sure keeps the insurance premiums down.see what American Muscle has for your set up.
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