New brake disks without replacing pads... - Will the world explode into a ball of fire?

Akagi

Akagi

Akagi

Caporegime
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Hi guys,

So I need to do the front disks on my Corolla because one of them has warped slightly. (cheap eBay Evora drilled & grooved disks...)

But my pads are EBC Yellowstuff with loads of meat left on them. Can I re-use these, or should I definitely replace them?
 
Just heard people say that you should always do disks and pads together etc... Just what I have rattling around in mah brain. :)
 
You can reuse them but breaking may not be at its optimal as if you have wrapped disks the pads won’t be flat so until the pads have warn down to an even level.

Which is why most people will switch both at the same time.
 
jamoor said:
How do you manage to use cheap discs with expensive pads
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Wasn't me. :p

I didn't know they were cheap ones tbh. The fact that one is warped prompted me to flit through the history, and found that they are "Evora" drilled & grooved discs.

A quick Google told me they are cheap eBay tat.
 
Last time I was told I had a warped disc, after vibration under braking, it turned out to be a track rod end that was past its best :p
 
I am a change discs and pads together person..

It Not good idea to use old pads as they must likely have grooves in them from the old worn out discs..
So it could make grooves on your new brake discs if the pads are not completely flat..
 
Diddums said:
You sure it's warped?
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Fairly. Symptoms:

- Light knocking noise coming from the front constantly, goes away when gently brushing the brake pedal
- Very loud "womwomwomwom" noise under moderate to heavy braking
- When braking gently at low speed you can sort of feel the braking effort flip flopping. Like its gripping a little more then a little less with each rotation of the wheel.
- Took the NSF wheel off and span the disk, can feel it getting much harder to turn part way round, then spins freely, then gets tight again, etc. Not noticeable with the wheel on and spinning by hand though.
 
They should be changed together like you think, but disc are tougher than pads.

So you can do as your thinking, but for first 1000 miles or so keep your braking light and easy, don't try to emergency stop. You will see banding on the disc from where the pads are not contacting the disc due to the surfaces not perfectly mating together. As long as you take it easy after a few hundred miles the pads will mate up to the disc perfectly.

Did this when I fitted the new Alcon disc on my M3 as its front pads were not so old, so took it easy until the disc stop showing corrosion (where pad had not contacted disc) and after a few hundred miles of light use all was fine. :)
 
it's not ideal but I have re used pads before, i got some course sandpaper on a flat surface and rubbed the pads on it for a bit to smooth them out, just don't breath in too much when doing it :o
 
No its for the Corolla. Set of Yellowstuffs is £60. Pair of decent disks is £70, so replacing the pads (if I want like for like, and I would) would double the cost lol. :p
 
I must've missed the part you bought another Corolla :o

Start with just the discs then. If the result is pap then get new pads.
 
Just looked up the job, turns out changing the discs on these is a piece of ****. :)

2 bolts and the caliper is free, 2 bolts and the carrier is free, then the disc falls off. :p
 
Acme said:
... then the disc falls off. :p
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That's if it goes to plan! It'll probably need a few knocks of persuasion depending how long it's been on and the corrosion. I'd recommend using some Pagid CeraTec from ECP for the areas that need to be lightly greased (obviously keep it away from the surface of the discs and pads!). To answer you original question, I'd replace the pads anyway so you don't have to do it again sooner rather than later. If you're not keeping the car for any length of time then no problem.
 
Mysterae_ said:
That's if it goes to plan! It'll probably need a few knocks of persuasion depending how long it's been on and the corrosion. I'd recommend using some Pagid CeraTec from ECP for the areas that need to be lightly greased (obviously keep it away from the surface of the discs and pads!). To answer you original question, I'd replace the pads anyway so you don't have to do it again sooner rather than later. If you're not keeping the car for any length of time then no problem.
Click to expand...

Nope, they're already loose thankfully! :D
 
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