We used them all the time
View Poll Results: Do you need to replace rotors every time you replace pads?
Yes, replace them every time
6
17.14%
No, replace the pads only (unless the rotors are worn)
23
65.71%
Resurface the rotors when changing pads
6
17.14%
Voters: 35. You may not vote on this poll
Brake question / opinion
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,339
From: Havre de Grace Maryland
There are two VERY important parts in your car that keep you from having a very bad experience, Brakes and Tires. If your go to mechanic says replace both routers and pads, just do it. No brainier for me since I trust my mechanic. BTW, had my rears replace in 2019 at 44K with pads and routers.
.
Joined: Apr 2013
Posts: 5,042
Likes: 1,157
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
Thread Starter
Le Mans Master
Joined: Dec 2017
Posts: 5,602
Likes: 3,322
From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
Thread Starter
Le Mans Master
Joined: Dec 2017
Posts: 5,602
Likes: 3,322
From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
Thread Starter
Le Mans Master
Joined: Dec 2017
Posts: 5,602
Likes: 3,322
From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
Okay, I got the brakes done yesterday. As it turns out, I'm actually pretty glad that my guy insisted on resurfacing my rotors. When he put them on the brake lathe, it became very clear that they had some minor warping. I got to watch the process, and there is no doubt that I ended up with a better surface than what I had. It turns out that my brake fluid was in better shape than I thought, but it was still a good idea to change it. It was a bit of a challenge to properly bed the new pads as the process for doing so is virtually impossible to do if there is any traffic around you at all. However, I did manage to do it. The new pads certainly have a bit more bite. However, I'll wait until my oil leak is resolved before properly testing how well they handle high heat. Thank you to everyone who posted in the poll.
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Verdad Gallardo
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,668
As a long time Toolmaker, I would like to add something. ANY machining process will leave small grooves, some so small you'll need a magnifying glass, or microscope, to see them. Also, a "blunt" tool in a turning process, such as a toolbit on a lathe, is not the most desirable thing to have! The greater area of contact will amplify any 'play' in the system, and promote tool 'chatter'. Sure, you generally don't want a pinpoint contact (except maybe when turning threads), but you don't want a large area just to avoid lines. Even grinding wheels leave microscopic lines! Nothing wrong with having a slight amount of lines on your rotors. The bedding in process will eliminate them, and the pad will wear into/bed in to whatever small valleys may be left. Having lines 90° to the rotor would be a different story, and would probably be undesirable. For this reason, I usually don't resurface my rotors, unless I have pulsing, no matter what may be causing the pulsing.......
Last edited by grinder11; Jul 27, 2021 at 04:17 PM.
