The Correct Direction to Install Performance Rotors on Your Car or Truck
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- Опубліковано 1 сер 2024
- Did you just get some shiny new performance drilled and slotted rotors for your vehicle? Did you know there is a correct way for them to face? Check out this video to learn which way the slots on your brake rotors should face, and why!
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While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video. - Авто та транспорт
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This information is incorrect. You want the grooves to channel any gases (or dust) away from the hub, not channel them towards the hub.
This is the only time I've ever seen rotors suggested to be put on that way. Most aftermarket high performance rotors (including Powerstop, which is what I have) are labeled and instructed to be put on the way you say not to.
What dictates the direction they should be? The internal vanes or the holes and slots on the surface.
I love Sue. She helped me nail the front brake job on my F-150. Learned a few things. Here though she’s off the mark. It doesn’t make a difference for the drill holes or for slots which end before the outer edge of the rotor. If the slots open up at the outer edge of the rotor then she’s got it exactly backwards.
If the rotors have directional cooling vanes then what you have is actually a centrifugal air pump and so it becomes most important to pay homage to that and ignore the slots and drill holes. Viewed from the top, the vanes should angle backwards. If they don’t then you are spinning your centrifugal air pump backwards and in a manner which creates high pressure on the outer edge of the rotors. In turn that impedes air flowing from the inside to outside as well.
+SeeSawMacaw Thanks for the feedback!
It was a great explanation between the cooling vanes. It's a HUGE HELP.
Thanknyou!
Thanks for the short sweet informative explanation.
Depends on the rotors you buy, don’t just blindly do this to all rotors, power stop’s direction is the opposite of this
I knew this when I got my first SRT8 and the factory rotors when how you described!
Beautifully done
There is a serial number that ends with L or R that tells you which side it is on. I just checked mine and it's exactly the opposite of what you said.
Great job explaining why the grooves needs to cut in to the pads!
Informative, that I didn't know, thank you
I Install mine base on which way the directional veins point, which is suppose to be towards the back of the car. Im sure its not base on which way the drill or slot point because that doesn't matter. Different manufacture make different rotors. If its Non directional then its just preference which ever way makes you smile. So when you see other peoples rotors pointing the opposite of your it doesn't mean its wrong because there's no way to tell unless you look in the veins to see if its directional or not.
That's true cause I have one set with stickers saying the opposite of what she is saying.
Love the 1A Auto DIY videos, quick, concise, and professional. Thank you for your hard work.
Didn't know that, thanks
Everyone else, including my own certifiers, say you're exactly wrong because your way pushes the gases down the slots and into the hub area. They're supposed to push gasses and dust AWAY from the hub. Unless there is a directional air wall. Then you Mount them according to the air wall so that the rotors grab wind and cool the rotors. Usually this design is only found on cross slotted rotors but, I have seen D&S rotors with a directional air wall.
Brembo and Summit both say it doesn't matter. PowerStop agrees with this lady. Stop Tech disagrees with this lady.
Ultimately, it doesn't matter so long as the cooling vanes aren't directional. In other words, the slots and holes are not directional.
I got these at a reputable shop and they installed them this way as well
I'm not an engineer or anything, but I just purchased a Wilwood set that has the the slots feeding into the hubs for my c6.
It threw me off because I'm used to the slots feeding outward in drive. They have an indicating arrow etched in for direction of travel and I had to research around to ensure they did not mark them incorrectly.
These are curved slots though, I don't know if that influenced their decision, but it did throw me off, having the slots feed inward.
Cooling fins are more or less uniform in direction for my purchased set.
Thanks folks. I have a set of these rotors on my 04 Toyota Sienna. They work great.
+Charles Harper Thanks for checking us out! 1AAuto.com
Thanks for the info. I didn't know and had a 50/50 chance. Naturally I got it wrong!
Time to swap the rotors, thanks for sharing!!!
Thank you 🙏🙏🙏
+Marc D Antonio Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
Sue is my favorite 1a auto mechanic👍🏽
That’s funny.. PowerStop has a video saying the slots are angled toward the rear of the car going the direction most people would assume is correct (not the opposite).
And they would be correct. Its not about grip its about venting the hot gasses out so you have a consistent brake pedal when your brakes are hot.
Exactly. I’ve never seen slotted rotors installed the way this video states. It’s cooling and diverting brake dust.
I've only seen a co-worker argue me this. Mine are my way, which I presume correct and theirs is their way.
I think I would trust what the manufacturer designing the product says is correct over a 3rd party distributor's opinion.
I just installed power stop rotors on my truck this past weekend. Today i saw a very cool 1955 f100 pick up and it had the rotors installed Opposite of mine. And so here I am at youtube university😅🤣😂😊😁 think I will keep them the way power stop said 🤷♂️
Beautiful diagram.....!!!!
+Javaid Hussain Thanks for checking us out! 1AAuto.com
For all the people out there swearing they know whats right, it’s not the holes or the slots that determine the direction. It is the vanes that determine this. Also, of the slots are curved: directional. If straight: not directional.
About to be 1 Auto parts company about to go out of bussiness given people false information! I cant get over you saying you want them to cut into pad😂😂😂😂
Interesting, I would have guessed wrong as well. Thanks.
+Gogle Plus Sucks Thanks for checking us out! 1AAuto.com
El Rotor tiene una numeración que te indica con L/ Left y R/ Right y se encuentra en el borde del rotor, por ejemplo, 31346L / 31346R
Thanks Didn’t know that but I did it right
Thank you...
+Mahmoud Al Shawi Thanks for checking us out! 1AAuto.com
The corvette shark fin rims in the 90’s are designed to grab the air and force it over the brakes.
A lot of ppl thought it was for show and it function.
I purchase a set of Power Stop pad and cross drilled/slotted rotors from another very reputable company. Mine are installed opposite than what you are saying, but they each had a label on them saying Driver Front, passenger front and the same for the rear. I know the rotor is supposed to look backwards but I installed according to their directions
Same here the front one were labeled opposite of the video
Same issue and my friend said slots facing forwards too.
I have to join in with yall also and say the video is incorrect! these are not Brembo Brakes, I have had 1 (ONE) set of PowerStop Drilled and Slotted rotors on my car in the front for 3 years and some months with absolutely no issues... no noise, no brake failures. Last year 2021 R1Concepts caught my attention, and I made the switch to them. SAME THING both companies had a sticker on the rotors and it is the opposite of what this video is sharing. A1 Auto has some really great content but i cant agree with this one.
I agree with other comments, if the rotor has directional vanes and/or slots that go to the rotor's edge, then sure those should be facing forward. Meaning scooping the air into the rotor vane/slot.
So for rotors with STRAIGHT VANES and NON- edge slots here is my opinion, and I think I think I am right on this.....
It does not matter.
There is no "bite" from one direction vs the other. At any given speed, the amount of time the any given part of the slot on the rotor is exactly the same regardless of direction. The pads are passing over the slot. Look at 0:47 where her hand is over two slots. If the rotor goes counter clockwise (which is suggested), then the outside of the slot goes under the rotor first. That is the only difference between that and if the rotor turn clockwise, then the part of the slot closest the center goes under the the pad first. Again looking at 0:47, as the slot exits the pad (her right hand) , whether CW or CCW the slot will end up perpendicular to the ground and with the edge of the slot facing the direction of travel. I and I would say at that point any dust in the slot will be dispersed.
Also just another way to think about it...
At 30mph the tire is rotating roughly 5 times a second. That amount of wind, combined with the forward travel wind, and if any outdoor wind, well that makes for a lot of wind which I think would vent (blow out ) the slot no matter which direction it is angled on the rotor relative to the tire rotation.
I know way too much thinking on this, but is an interesting question. And just my opinion , so I could be totally wrong.
I'm a big 1A fan/customer and thanks for all you folks do.
PS - I just put 1A loaded struts on an old S60 and it is riding smooth.
EXACTLY.
I recently replaced the rear brakes & rotors on my 2012 Camry. The performance rotors that I purchased each had a sticker on them indicating the side of the car it should be installed on (Driver & Passenger). The slots for these rotors were in the opposite direction of what is being shown in this video.
I have straight vane rotors and I installed them opposite per directions. Many sites say it doesn’t matter what way you install a straight vane rotor.
+BULLI KID Thanks for the feedback!
Just did a 40k mile brake inspection on a charger scat pack. They have them in different directions between left and right. Maybe why he has brake noise.
Usually there's a sticker on the rotor telling you if it's driver's side or passengers side. Pay attention to that, also if there's no sticker check the box for falling sticker, use a marker to write the direction after opening the box just in case you forget or get confused.
+Ahmad Ghosheh Thanks for the tip!
R would indicate passenger side right ?
So I bought these and they're screeching REALLLL bad. Any idea why? I bought the pads and these exact rotars but it makes a loud grinding noise and vibrates when I brake.
I recently got some of these and put em on backwards.
Since it took me a few hours to do and I don’t have time to do it again..they’re staying like that lol
Good luck on not having stoping power and cracking the pads and not able to stop 😂
@@unknownplayer23 lol he hasn’t replied his brakes clearly failed I hope he’s ok
If you've ever gotten your brakes really hot going down hill, gas starts to get stuck between the pad and the rotor making the brakes less efficient. The slots are to let that gas get pulled out...if you install them the right direction. This is a instance of someone making a part they have no idea what its for
One cuestion now do I need to replace my brakes tha was just one moth old
But I seen race cars installed them both ways...?
Great video you wouldn't believe how many I've seen on the wrong way
Thank you very much I have to switch my rotors 🙈
I just installed Powerstop drilled and slotted Rotors..they are completely opposite of what you are showing..the drivers side sweeps from the middle of the Rotor towards the front..so 1 o'clock to 7 o'clock
my friend has a Cadillac CTS V and the rotors are opposite of what this lady is saying. But if the cooling veins are curved, place them going back away from the front of the car.
Odd, PowerStop, in their videos, advises to install them in the exact opposite direction as you guys indicate. I suppose each manufacturer has a difference design.
+Brian Kman Thanks for the feedback!
tons of videos on youtube where they put these the wrong direction.
thanks for the information
Well my manufacturer said to do it the opposite direction. Depending on internal cooling fin setup and I guess engineering principles in argument. To me, I went with my manufacturer (powerstop) recommendation.
Wow and everyone does the exact opposite 😩. Thanks for the info 👍🏽
My boss told me i put them on backwards ,and had to put on the wrong way ,boss is in the brake business for 13 years now .i am shocked that he is still in folt!
I just came to a brake shop and was told my rotors are installed wrong lol whats really going on with these brake shot owner?
Is the rotation for a left hand or a right hand drive car
wrong. its exactly the other way around as she is saying in the video.
when you follow the groove from the inside towards the outsids/top (towards the edge), it should be pointing towards the REAR of the vehicle.
Glad to confirm this cuz i got a set and 5hey were labled the direction you are saying but if i did not inow i would have put on backwords , but when u think of it from the scientific and engineering POV this makes perfect scence to evacuate the gasses quickest and to help the pads grab better as apposed to i feel it would alow slippage to a degree if it was going with the grain sorta speak ...
I bought mine from a1 auto and there was no label on them, so thought it doesnt matter then. After my mechanic installed it, i looked online on their site for the direction/diagram and sure enough, my mechanic installed it in the wrong direction. This is ridiculous. You guys should put a label on each rotors saying L or R. Is that so hard to do?
Bad info in this video. If you have straight vane rotors (which you probably do), then it doesn’t matter which direction they are installed. If you have directional vane rotors, then the vanes (not the slots or holes on the face) should point towards the rear.
Why do manufacturers like PowerStop say to install them in the opposite direction shown on your video?
I was thinking the same thing. Just ordered powerstops and their website shows the opposite way, It should be dependent on the cooling vane direction and manufacturer instructions.
@@brendanhumphrey3726 Just stick a screw driver in the veins and see which way it point if its towards the rear meaning its correct.
holy shit! I've always done them the wrong way
So many people don't get the basic physics at play here.
1. It doesn't matter what way the gas and particles get ejected. The pad doesn't extend all the way to the hub.
2. A cutting angle towards the direction of rotation will be more abrasive than a cutting angle away from the angle of rotation. Basic cutting toll design here.
3. The wheel is spinning at great velocities, so all particles will be ejected out the top no matter the direction.
4. Vanes angled with the rotation will create an external air pump ejecting all heat.
Why is there so much controversy on which way they go?
@ 2:00 the rotation direction you’re showing is the same regardless of vane angle
Had installed some just to remove them because of how loud they are
It really does not matter, especially if you have straight vanes, typically they should be installed in the rotation of the wheel
This is a non-directional rotor. It makes no difference which direction the slots go on rotors with straight vanes like this one. All slots do is allow heat brake pad gas to escape away from the rotor to reduce brake fade in high heat situations.
Detroit Axle rotors have the mark "R" or "L" on the end of the serial number of each rotor. That SN# is on the outside edge of the rotor. The R or L at the end of the number indictes which side of the car it is made for. The R or RIGHT rotor slots point to the back of the car. Same with the left of course. After watching this "incorrect" video I had to double-check with Detroit Axle to be certain. So for Detroit Axel rotors and my car, this video is giving the wrong info. Check your new rotors for correct placement.
I said the video is "incorrect" because it isn't the direction of the slots/drill holes you need to worry about. Put a screwdriver into the vents on the edge of the rotor. Or just look down at them. Screwdriver is easier. The correct placement is when the screwdriver end is pointing to the rear of the car. That's where heat is dissipated. So you want those vents pointing to the rear of the car for max cooling. Some manufactures like Detroit Axle have the vents pointing straight up. So in their case it truly doesn't matter which way the slots are pointing. Other manufacturers have slots and the vents pointing opposite directions. In those cases if the slots point to the rear and the vent is pointing to the front, you could get overheating.
Check the orientation of the vents before you install them. Or simply call the manufacturer if you have a question.
So is this a manufacturer recommendation? Other manufacturers videos show them opposite?
Cross drilled rotor orientation is the same regardless of the direction of vents on the rotor. The illustration in the video was quite unclear and implied direction vent vanes changes the orientation of the drill pattern to the direction or rotation. The only point regarding vents is that the rotor vents need to sweep backward in relation to the rotation of the wheel. The video does a poor job illustrating that point..
I bought new drilled and slotted rotors from R1 Concept I installed them as it shown in the video which is the correct way of installation but I've got noise when I'm driving.....any help???
If your rotors are directional stick a screw driver in and see which way it point. If it point towards the rear of the car then its installed correctly
There are other videos showing to put them the other way lol. Who’s really correct?
Every other video shows it the other way unless the fins are angled. Must be for your rotors only.
My R1 Concept rotors say the opposite for the direction than what you show. Even PowerStrop video show opposite. I'm sorry but this video is completely wrong, why is there so many positive feedback on this.
In your others videos there isn't consistency. Xc90 installation for instance.
The sticker I got told me opposite of what she said when I replaced my brake disc not long ago.
It depends on the manufacturer!! Porsche wants them the way you say "wrong". It all depends what direction the vanes go.
You're actually wrong. It goes the other way, pushing brake pad debris away from the rotors.
+Mr Persaud Thanks for the feedback!
Every other video shows it the other way as well. Her way will wear your pads out faster.
That’s exactly how I expected them to go, inside hitting the pad first and throwing gasses and debris to the outside 🤷🏻♂️
Never seen anyone install them in that direction. It would make more sense for the slots to push outward not inward (to dispel heat and brake material away from the caliper.
Not to mention having the slots go into the pads can cause jitter. With that said, always go with the rotor manufacturers recommendation.
+Paul D Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
it all depends on the manufacturer of rotors, for all you saying she is wrong, look she is going off paper instructions from manufacturer of rotors these rotors have straight fins. they go this way, some manufacturers are different, i have tryed this bolth ways on several occasions, to see if there was a difference, and there real is no noticeable difference, just saying
It really doesnt matter - if the vanes are non directional (straight), u can put them either way..
It only matters when the vanes ARE directional. In which case, the vanes should always be sweeping towards the back of the vehicle..
Orientation of drilled/slotted rotors is preferential.. StopTech, who is a VERY well known and trusted brakes company, has a video that says the exact OPPOSITE of this video..
So I would say neither are wrong or right.. as long as the cooling vanes are NON-DIRECTIONAL (straight), then it's purely up to u which way u want them facing 👌
Detroit axle has a video, and they say install the other way, so you are on backwards.
Every manufacturer is different. I have PowerStop brakes on my truck.
I am staggered that there seems to be no definitive reliable view which way soemthing as fundamental as brake discs should be fitted, whether handed discs grab air or remove air, whether slotted discs face towards or away, it is simply astonishing there are so many conflicting opinions. It shouldnt't be that difficult. Helpfully this video shows an instruction sheet which indicates which way veins should face, but what if the drilled slots are in an opposite direction to the veins?
If your veins are directional and curve inwards then ignore which direction the slots are facing, the cooling veins are VITAL to your brakes cooling down. You want the veins to be curving outwards towards the front so that they scoop in the air into the middle of the rotor. I've been scowering the internet for days and honestly I dont think the slot direction really matters. I've seen manufacturers recommend both directions for slots, the brand I bought from (r1 concepts) recommends the same as powerstop, pointing to the back of the car the way you would expect a cooling fan to face. I really think its just preference as long as your cooling veins are straight
Not to mention directional rotors have letters on them
Indicating which side they belong on stamped on it
u would think they would say on the instruction sheet but didn't even get that
This is bad information if you got Detroit axle rotors, which those look like there is a part number on the edge you will see at the end of the part number an R or an L that is left or right side if you were in the car! So driver side is left and passenger is right side!
This is incorrect. Surestop has a L or a R after the part number. L being the driver side. Most other manufacturers do the same.
The slots are to rotate "into" the pads, not rotate backwards. You'll want the cooling veins to "throw" into the pads and calipers, not "pull" away creating brake dust to be thrown all over the wheel and tire, as well as not having any cooling properties at all.
Slotted rotors aren’t for cooling 🤦🏽♂️
Thank you all they put was R and L depending on which way you looking at the car all they had to do was put driver's side passenger side or D & P SMH.
This is conflicting information from other resources on the web.
I did not get a very good understanding about the Cooling finns
This isn't necessarily correct. The rotor has a serial number on the edge, the first series of numbers will either end with an R or L. this is the side of th car the manufacturer recommends installation.
👍👍👍👍👍👍👍👍👍🙏🙏🙏🙏🙏👌
There's no correct orientation
This person's explanation is off. Direction only matters if vanes are directional. But for straight vanes, can be installed either direction.
Ok let me set the record straight. First there called drilled and slotted..
Second you are right and wrong!!
Only rotors with straight veins are to be installed with the slots and drilled angle pointing to the front!
Now most of all like 99% the viens are on a slant in that case you are wrong those rotors you want slant pointing to back of car!
So basically your the only company making these fucked up rotors!
I love how you said cut into brake pad! If anything is cutting into my brake pad someone is buying me new pads! I drive a Super Sedan 800HP BMW F90 M5 with 6 piston big brakes and the rotors happen to be drilled only but since there so big the drilled part is spaced far apart and keept in from the outside 3/4 in that's how they came from factory and guess what. The slant part is pointed toward the back of the car just how it should be.
So why don't you go tell BMW, Mercedes, Ferrari, Lamborghini,.ect ect that they have it all wrong!!
From a company I never even heard of before.😂😂
The only A1 I have is going on my steak!! A1 1A all the same nobody should buy this product unless you want these to really cut into your pad hahahahaha
You're lying to people you are installing those rotors in the wrong direction so they get damaged quickly so please remove this video and make a new one apologizing to you customers
WRONG!!!! you want the dust to be diverted outward 🤦♂️
Bad information in this video
Son of a b...
They appear to be nice people but they need someone in charge of making sure they send the right stuff, been trying to have them fix and order for a while now and they send the wrong stuff. I will pay more next time and just bite the bullet with better name brand ridiculous cant work on vehicles like this.
If these are going the wrong way why didn't they delete and re shoot this video ... why knowingly keep misinformation on here?
The manual she shows literally shows the opposite of what u are telling us. Smh
What is the actual scientific reason? No one seems to touch on that. If you have straight vents then i see absolutely no reason what it matters
WRONG