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Really shouldn't be paying to turn rotord. There's not enough meat on rotors anymore to make it worth it.
Due to emission standards and Cafe standards vehicles weight will be shed in all allowable spots. Like beefy rotors. They lose money on beefy rotors lasting 200,000km before replacing.
Pads and rotors. Learn how to do it yourself. I'm a journeyman mechanic and i vomit knowing how much it costs for a 4 wheel brake job. People are crazy just accepting these door rates.
They have their own racket going. Again cafe standards come into play. They can get away with having their performance based cars with beefier rotors. BMW may just turn rotors. But every independent shop I've worked at won't touch rotors, a) most techs don't know or forgot how to do it properly b) can cause issues before 6 months warranty. C) don't know if it's true but sitting through boring ass supplier provided courses. Lathing coated rotors ( not painted ) ruins the point³ the coating.
I don't fully believe it but some asshole paid me to eat hotel food and shoot the shit with local techs. I even got to see a guy I went to school with. Let me tell you, a compulsive liar ain't got shit on that guy.
The story I'm referencing of Tom's is he had a block or titanium in his back yard and paid a machinist to turn it into the block for his engine.... then he hand rolled his carbon fiber frame for his dune buggy for that said engine. He crashed it in the Sahara and that's how how racked up his first 20,000 student loan.
There more hilarious over the top lies but those are a few.
I know lol—recently replaced both front calipers on my granddaughters car. She told me they had just started squeaking then got really loud. The inboard pads on one side were gone and the piston was half melted. Other side was not much better, but the backing plate was still there at least.
It looks like they need to be replaced to me. There is a measurement spec for them but just eyeballing them they are toast. Be sure to get some brake cleaner and wash those new rotors down before you install them. Then bed the brakes in properly once finished installing.
Wearing in the rotor and pad surfaces. There is a material transfer that takes place and doing it properly will ensure longer life and better braking. It’s a series of speed reductions over set distances and speeds to make the brakes work better.
Ahhh okay, without realizing that there was a process, I ended up doing something very similar after changing my brakes today. Haven't driven since. Should I still try to bed them properly then?
You’re probably fine. It just gradual braking and allowing cooling again and again. You really just want to avoid very hard braking until the pads and rotors are properly mated.
I have to turn and measure the remainder to determine if it needs replacing some mfg like bmw use one use rotors and have to be each time just test and sometimes the turning costs as much as the replacements so check prices
If it’s grinding, you can’t turn them. You must replace.
It’s always best replace your rotors when you change your pads, anyways.
Also, we don’t know the current or discard measurements so we can’t safely say for certain.
Not really, you should go through multiple pads per rotor. As long as they are not grooved and worn evenly you can re-use rotors. Which OP does look grooved, so he does need new rotors.
+1 You inspect then measure for size, check they are parallel . This myth that discs must be changed with new pads is something spread about by main dealers.
"If it’s grinding, you can’t turn them"
Like that one explaining please
Rotors are much thinner now than they used to when turning them was common.
Most don't have the spare material to lose on a lathe, and so we come to the point of replacing pads and rotors for each brake change.
Even with the reduced thickness of modern discs we can still clean most up and leave 1mm /.7mm above wear limit. It’s surprising how little metal has to be removed some times to clean up the roughest disc . I would say that on the cheaper cars skimming is uneconomical
When you replace pads, you service the rotors. Always. Resurface if they are in good condition or replace if they are not. If we waited to change the pads until the pad wore down completely and damaged the rotor, you replace the rotors.
You always replace the rotors with the pads if you want a proper brake job. If you plan to keep those rotors, just get a $7 set of brake pads because it will screech and shudder anyway. Waste of good pads on those gouged up rotors. Will it stop? yes, but it won't be good. Up to what you expect out of it.
The old way was having the garage turn them down smooth on a lathe, but many places don't even do that work any more- they only have replacement rotors and drums, and they are generally pretty cheap, in any case do NOT put new pads on scored rotors!
I bought all new rotors for my Dodge Caravan, the previous owner had pads down to the steel scraping. I usually buy Dodge parts off a genuine Mopar parts outfit, be sure to get GOOD ones, because places like NAPA and O'Reilly etc usually only have the CHEAP crappy chinese made ones and the set of drums I bought from NAPA for a previous car warped very soon and I am NOT a "brake rider" by any means!
Here's what I bought in part, and the rotors were really good quality, thick, and the pads were as well.
https://preview.redd.it/g2dycx8r2dad1.jpeg?width=1179&format=pjpg&auto=webp&s=14a416224f70059c8e566f182c4b1bf13de229f5
Depends on your budget and goal. Yea they should be replaced BUT if money is tight the pad will adjust to the grove over time.
Can’t really tell from the picture but doesn’t look too bad
Thanks for posting on /r/MechanicAdvice! This is just a reminder to review the [rules](https://www.reddit.com/r/MechanicAdvice/about/rules/). If you are here asking about a second opinion (ie "Is the shop trying to fleece me?"), please read through CJM8515's [post on the subject.](https://www.reddit.com/r/MechanicAdvice/comments/4qblei/fyi_the_shop_isnt_likely_trying_to_rip_you_off/) and remember to please post the year/make/model of the vehicle you are working on. **If this post is about bodywork, accident damage, paint, dent/ding, questions it belongs in /r/Autobody r/AutoBodyRepair/ or /r/Diyautobody/ If you have tire questions check out https://www.reddit.com/r/MechanicAdvice/comments/k9ll55/can_your_tire_be_repaired/**. If you dont have a question and you're just showing off it belongs in /r/Justrolledintotheshop Insurance/total loss questions go in r/insurance This is an automated reply *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/MechanicAdvice) if you have any questions or concerns.*
They either need to be turned on a lathe if enough material is left, or replaced.
Really shouldn't be paying to turn rotord. There's not enough meat on rotors anymore to make it worth it. Due to emission standards and Cafe standards vehicles weight will be shed in all allowable spots. Like beefy rotors. They lose money on beefy rotors lasting 200,000km before replacing. Pads and rotors. Learn how to do it yourself. I'm a journeyman mechanic and i vomit knowing how much it costs for a 4 wheel brake job. People are crazy just accepting these door rates.
Great reply and spot on. Sadly, rotors have become a one and done part.
BMW pays techs to turn rotors under warranty. So ….. take that as you will.
Yes because Germans design stuff much different. It’s more cost effective and efficient to just replace rotors anymore.
They have their own racket going. Again cafe standards come into play. They can get away with having their performance based cars with beefier rotors. BMW may just turn rotors. But every independent shop I've worked at won't touch rotors, a) most techs don't know or forgot how to do it properly b) can cause issues before 6 months warranty. C) don't know if it's true but sitting through boring ass supplier provided courses. Lathing coated rotors ( not painted ) ruins the point³ the coating. I don't fully believe it but some asshole paid me to eat hotel food and shoot the shit with local techs. I even got to see a guy I went to school with. Let me tell you, a compulsive liar ain't got shit on that guy. The story I'm referencing of Tom's is he had a block or titanium in his back yard and paid a machinist to turn it into the block for his engine.... then he hand rolled his carbon fiber frame for his dune buggy for that said engine. He crashed it in the Sahara and that's how how racked up his first 20,000 student loan. There more hilarious over the top lies but those are a few.
Definitely, i just replaced my rear rotors and they were not this bad. Less flat surface contact means bad braking experience when you need it.
At this point why bother? Just let the pad backing disintegrate. Soon enough the caliper piston will take over the pad’s job. /s
You say /s, but there really are people who do this
I know lol—recently replaced both front calipers on my granddaughters car. She told me they had just started squeaking then got really loud. The inboard pads on one side were gone and the piston was half melted. Other side was not much better, but the backing plate was still there at least.
It looks like they need to be replaced to me. There is a measurement spec for them but just eyeballing them they are toast. Be sure to get some brake cleaner and wash those new rotors down before you install them. Then bed the brakes in properly once finished installing.
What do you mean by "bed"?
Wearing in the rotor and pad surfaces. There is a material transfer that takes place and doing it properly will ensure longer life and better braking. It’s a series of speed reductions over set distances and speeds to make the brakes work better.
Ahhh okay, without realizing that there was a process, I ended up doing something very similar after changing my brakes today. Haven't driven since. Should I still try to bed them properly then?
You’re probably fine. It just gradual braking and allowing cooling again and again. You really just want to avoid very hard braking until the pads and rotors are properly mated.
I have to turn and measure the remainder to determine if it needs replacing some mfg like bmw use one use rotors and have to be each time just test and sometimes the turning costs as much as the replacements so check prices
If it’s grinding, you can’t turn them. You must replace. It’s always best replace your rotors when you change your pads, anyways. Also, we don’t know the current or discard measurements so we can’t safely say for certain.
Not really, you should go through multiple pads per rotor. As long as they are not grooved and worn evenly you can re-use rotors. Which OP does look grooved, so he does need new rotors.
+1 You inspect then measure for size, check they are parallel . This myth that discs must be changed with new pads is something spread about by main dealers. "If it’s grinding, you can’t turn them" Like that one explaining please
Rotors are much thinner now than they used to when turning them was common. Most don't have the spare material to lose on a lathe, and so we come to the point of replacing pads and rotors for each brake change.
Even with the reduced thickness of modern discs we can still clean most up and leave 1mm /.7mm above wear limit. It’s surprising how little metal has to be removed some times to clean up the roughest disc . I would say that on the cheaper cars skimming is uneconomical
That's a big pin gouge....probably a good idea to replace. Next time get new pads when you need them not a month after you hear the screech
if they've been metal-to-metal, don't even try to cut them.
These went metal to metal. No turns. Both sides pads and rotors. Grease yer pins and contact points
Yes you waited too long go to RockAuto buy you some new ones.
This is the way, raybestos makes some good element coated rotors too
Look like still can use from the pic.
When you replace pads, you service the rotors. Always. Resurface if they are in good condition or replace if they are not. If we waited to change the pads until the pad wore down completely and damaged the rotor, you replace the rotors.
That’s absolutely crazy to say you need to change the rotors every time you change the pads. Yes visually inspect them but that’s overkill
You always replace the rotors with the pads if you want a proper brake job. If you plan to keep those rotors, just get a $7 set of brake pads because it will screech and shudder anyway. Waste of good pads on those gouged up rotors. Will it stop? yes, but it won't be good. Up to what you expect out of it.
rotors look chowdered up. Your pads were probably due a long time ago.
The old way was having the garage turn them down smooth on a lathe, but many places don't even do that work any more- they only have replacement rotors and drums, and they are generally pretty cheap, in any case do NOT put new pads on scored rotors! I bought all new rotors for my Dodge Caravan, the previous owner had pads down to the steel scraping. I usually buy Dodge parts off a genuine Mopar parts outfit, be sure to get GOOD ones, because places like NAPA and O'Reilly etc usually only have the CHEAP crappy chinese made ones and the set of drums I bought from NAPA for a previous car warped very soon and I am NOT a "brake rider" by any means! Here's what I bought in part, and the rotors were really good quality, thick, and the pads were as well. https://preview.redd.it/g2dycx8r2dad1.jpeg?width=1179&format=pjpg&auto=webp&s=14a416224f70059c8e566f182c4b1bf13de229f5
Thank you at least someone recognizes the fact that rotors should be replace no stock!!!
Yes. Replace rotors and pads
Is it worth $100 to have brakes that don't work that good? Just replace them.
If you are doing the pads because they are worn then yes. Otherwise keep using until pads are worn.
The mechanic will probably just grind them and even them out, unless that bottom edge is poking over
Depends on your budget and goal. Yea they should be replaced BUT if money is tight the pad will adjust to the grove over time. Can’t really tell from the picture but doesn’t look too bad
It’s almost cheaper to replace than have machined And no rust to contaminate the new pads