Scored rotor, ok to replace one side and one side only?

Scored rotor, ok to replace one side and one side only?

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Bewareofspoilers

Original Poster:

4 posts

115 months

Sunday 5th April 2015
quotequote all
Title pretty much says it.
Am thinking of replacing my scored rear left rotor. Knowing that we tend to replace both of them when one is worn, but I wonder if the same rule applies to this case?
Both rotors are no more than 4000 miles old.

Thanks folks

Edited by Bewareofspoilers on Sunday 5th April 03:38


Edited by Bewareofspoilers on Sunday 5th April 03:39

tr7v8

7,185 posts

227 months

Sunday 5th April 2015
quotequote all
Assuming you mean brake disc then you should replace them as pairs. Only Americans have rotors.
You also need to find out why it's scored is the calliper seized? Or the pad worn.

Dave Brand

928 posts

267 months

Sunday 5th April 2015
quotequote all
Replace both. Unless both discs were manufactured from the same batch of cast iron ("melt" in foundry terminology) there's a risk that the friction levels will differ enough to cause the brakes to pull to one side.

S0 What

3,358 posts

171 months

Sunday 5th April 2015
quotequote all
Dave Brand said:
Replace both. Unless both discs were manufactured from the same batch of cast iron ("melt" in foundry terminology) there's a risk that the friction levels will differ enough to cause the brakes to pull to one side.
The chances of getting 2 discs that are from the same batch are so minuscule it's not even worth thinking about TBH.
If it was my own car i would change the 1 disc (after checking for VV little or no wear on the "good disc"), if it was a customers car i would change the pair, mainly cos i know i wouldn't crash cos the rear brakes has a small imballence whereas i cant speak for a customers IQ or driving skill level.
As said check the calipers and change the pads for new on both sides as a matter of course

stevieturbo

17,229 posts

246 months

Sunday 5th April 2015
quotequote all
And what exactly are you calling a score ?

A light mark or huge gouge ?

Steffan

10,362 posts

227 months

Sunday 5th April 2015
quotequote all
Dave Brand said:
Replace both. Unless both discs were manufactured from the same batch of cast iron ("melt" in foundry terminology) there's a risk that the friction levels will differ enough to cause the brakes to pull to one side.
Good advice. All main suspension components need to be matched, shock absorbers, Discs etc particulacy so.

Bewareofspoilers

Original Poster:

4 posts

115 months

Sunday 5th April 2015
quotequote all
stevieturbo said:
And what exactly are you calling a score ?

A light mark or huge gouge ?

What do you think?
It feels worse on finger than it looks

stevieturbo

17,229 posts

246 months

Sunday 5th April 2015
quotequote all
Looks like fairly normal wear.

Never worry about it. Worry when the discs crack.

Dave Brand

928 posts

267 months

Tuesday 7th April 2015
quotequote all
S0 What said:
The chances of getting 2 discs that are from the same batch are so minuscule it's not even worth thinking about TBH.
That's why the better manufacturers only supply discs in pairs - they have quality control systems in place which allow traceability throughout the manufacturing process.

Dave Brand

928 posts

267 months

Tuesday 7th April 2015
quotequote all
S0 What said:
The chances of getting 2 discs that are from the same batch are so minuscule it's not even worth thinking about TBH.
That's why the better manufacturers only supply discs in pairs - they have quality control systems in place which allow traceability throughout the manufacturing process.