New Brake Discs + Old pads... stupid move?

[korto]

To make long story short I got front and rear discs, but not the brake pads...
My current pads on the car have more than 50% life in them - is it safe to mount new discs with current pads?

I know this is may not smart thing to do, but has anyone done it? Suggestions?

Thanks

[joenationwide]

Some would say bad idea. Thats because if the old pads are not all completely flat, you could wear a groove or a ridge on the rotor and reduce the useful life of the rotor, and any new pads you use.

There is a brake pad GB going on. Axxis Ultimates are pretty cheap, and effective I believe. I just put em on my car, but I haven't driven it yet. :( (Waiting to do more maintenance).

[cosM3os]

It's not a problem.

[kevc911]

I've read you should not do new rotors and new pads together. With that in mind I would move forward and just replace the pads after you wear them down more.
k

[Daved]

I've read you should not do new rotors and new pads together.
Why? I got to do new brakes in the rear and I'm getting new rotors and pads, what should I do then?

[kevc911]

Why? I got to do new brakes in the rear and I'm getting new rotors and pads, what should I do then?

Quote from article listed on Renntech:
Important - it is best to break in new pads on a used rotor. It is best to break in new rotors with used pads. If you can avoid changing both at the same time, especially with racing pads.

I would go ahead and do it. When you buy a new car it has new rotors, calipers, and pads. With that in mind I wouldn't sweat it. I have done all options (new plus old, new plus new) and as long as they are bedded in you shouldn't have a problem.
k

[korto]

Thanks... Then, I'll replace rotors now, and inspect the pads to make sure they are ok to leave on...
I can't wait to get this done, rotors are bent, and pretty much toast. Too much vibration when braking at speed.

[MSFIT]

yes

[fsmtnbiker]

At most, you can take the old pads out and block sand then to scuff up the face and make sure you've got a fresh pad surface for the new rotor.

[savage217]

Thats bs 90% of shops when you need new brakes replace rotors and pads at same time, it just take a little while for them to be broken in. And like other say, its not like new cars come with used pads for a while and then have them switch over to new ones.

[uncle]

It is easy to change the pads on these cars. If you are doing the work yourself, and the pads have life left in them, and seem even, and don't have crud imbedded in the surfaces, I would re-use them. The only thing to remember, is the second 50% will not last as long as the first 50%, due to the wear sensor.

[dcroghan]

don't do it. I made this mistake on my last car when I got cross drilled rotors and soon after those damn things were warped also:(

[cosM3os]

don't do it. I made this mistake on my last car when I got cross drilled rotors and soon after those damn things were warped also:(

Can't imagine how using old pads on new rotors could cause warpage.:confused

[mweinst]

+1

[korto]

well... :confused this weekend when I remove wheels, rotors and inspect old pads I will decide what to do... I bought new pads also, just in case.

[Eloff19]

Can't imagine how using old pads on new rotors could cause warpage.:confused

if you're replacing the rotors because they're warped, then isn't it a possibility that the pads have worn unevenly being applied to an 'uneven/warped' disc?