Installing used rotors: does direction matter?
#1
Thread Starter
Installing used rotors: does direction matter?
If installing a set of used rotors (that still have significant life; only faint hairlines), would it make a difference if they are remounted in the same orientation as previously (i.e., left on left, right on right) or not?
Just wondering if installing them in the opposite direction from the first use (so they would now be stressed in the opposite direction) would make them
a) more prone to crack (so less safe), or
b) less prone to crack, or
c) No difference
If b), then swapping rotors left-right at mid-life should extend their total life.
Just wondering if installing them in the opposite direction from the first use (so they would now be stressed in the opposite direction) would make them
a) more prone to crack (so less safe), or
b) less prone to crack, or
c) No difference
If b), then swapping rotors left-right at mid-life should extend their total life.
#4
Thread Starter
Well I've always just mounted them at random (stock are not unidirectional), so it might be c) or I've just been lucky to mount them in the same orientation . (...though I have had a rotor crack open, so maybe not.)
Where are the metallurgical engineers?
...or anyone with a rational theory .
Where are the metallurgical engineers?
...or anyone with a rational theory .
#5
Administrator
I'm pretty sure the stock ones are unidirectional. Honda doesn't have 2 part numbers for them.
And the cracking is from heat. Why would direction matter?
And the cracking is from heat. Why would direction matter?
#6
Thread Starter
Originally Posted by krazik,Jul 5 2006, 11:11 AM
I'm pretty sure the stock ones are unidirectional. Honda doesn't have 2 part numbers for them.
And the cracking is from heat. Why would direction matter?
And the cracking is from heat. Why would direction matter?
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#8
Registered User
Originally Posted by rlaifatt,Jul 5 2006, 11:05 AM
Well I've always just mounted them at random
With cast iron rotors if shouldn't make any difference at all (unless the vanes are directional). With carbon rotors it could make a lot of difference, depending on how they were constructed.
#9
Registered User
Originally Posted by krazik,Jul 5 2006, 11:42 AM
no I'm pretty sure the cracks are just from the heat.
#10
Registered User
I think he means once they've already been used. Yes, they are OMNIdirectional when new, but after they've been broken in, in a certain direction, do you have to continue using them in that same direction or would it matter?
I think that's what he means.
Warren
I think that's what he means.
Warren