Front Rotor replacement - is there a L / R?
#1
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
According the the directions we are not to confuse the L and R side rotors. I have not pulled the tires yet to compare, but I am looking at my new rotors on the floor and they are exactly the same and marked the same. I did not by Zimms, instead I bought rotors from Cquence and they are stamped M1396 on both.
So before I pull the tires and calipers off , I just wanted to make sure that there is or is not a difference.
So before I pull the tires and calipers off , I just wanted to make sure that there is or is not a difference.
#3
Rennlist Member
Join Date: Aug 2003
Location: Philadelphia
Posts: 467
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Interesting -- I do not remember seeing any differences - but I see the parts from Sunset on my invoice listing 955-351-401-51 and 402-51 ??
What is the difference?
What is the difference?
#4
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
From what I know about other front Pcar rotors .. the difference is the direction the cooling vanes on the outside are pointed. They do not cool as well if they are on the wrong side. Probably not a huge problem for road going Cayenne. Take a look ... I think you should see the difference.
#5
Addict
Rennlist Member
Rennlist Member
Join Date: Nov 2001
Location: Gloucester, Virginia
Posts: 1,488
Likes: 0
Received 3 Likes
on
3 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
From what I know about other front Pcar rotors .. the difference is the direction the cooling vanes on the outside are pointed. They do not cool as well if they are on the wrong side. Probably not a huge problem for road going Cayenne. Take a look ... I think you should see the difference.
IMHO, it's not worth it buying non-OEM rotors just to save a few bucks. On Porsche rotors the center hats are painted. On all non-OEM rotors I've seen (including non-OEM Zimmermans for my 951) the hats aren't painted and they end up with a rust coating that looks shabby. OEM rotors from Sunset Porsche (in Oregon) or Suncoast Porsche (in Florida) can be bought on the internet for a very reasonable price, and the parts guys there know there's a difference between left and right.
![Cheers](https://rennlist.com/forums/images/smilies/beerchug.gif)
#7
Still plays with cars.
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Are your replacement rotors slotted or ventilated? If yes to either or both, there is a left and right. If they are solid discs without ventiliation in the middle (turbine vanes) then they are the same on both sides. Google and you'll find a diagram which shows which way slotted and or ventilated rotors should rotate.
Best,
Best,
Trending Topics
#9
Rennlist Member
Join Date: Aug 2003
Location: Philadelphia
Posts: 467
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
My heart missed a beat for a second !
I always get a set -- recently from Sunset - at $123 each for the CS.
My mind never gave it a thought that the disc had to be different -- but I always point the veins to the rear.
I always get a set -- recently from Sunset - at $123 each for the CS.
My mind never gave it a thought that the disc had to be different -- but I always point the veins to the rear.