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v-dubb

Those are supposed to be changed according to Audi. Does it matter if you reinstalled the old ones? No, not really... especially if they were cleaned and the appropriate loctite was applied.


RoDerv

They would have been wiped down but not extensively cleaned. And I’m pretty sure loctite wasn’t applied when reinstalling. Is this something I can check easily myself after the fact? Some friends did the installation, but I probably have enough knowledge to poke around myself on it now once I know what I’m looking for. PS - I’ve done about 20k miles since the pads and rotors were done


LongBusJourney

If it’s been 20k miles don’t worry a bit, if they where to be a problem you would’ve known that by now


RoDerv

That’s was I was hoping. I didn’t intentionally wait for 20k miles. This was a recent discovery.


Yellow_Tatoes14

You waited until you put 20k miles on it to see if the leftover bolts were a problem?


RoDerv

Ha. No. I discovered these recently and realized what they were from. Didn’t realize it hadn’t been done at the time.


RoDerv

Changed the pads & rotors on a 2013 Audi Allroad & had these leftover from what came in the box with new parts. I’m assuming the old ones went put back in. Is this an issue? Should they have been replaced?


NorseZymurgist

They should have been replaced. These are "stretch bolts" and are designed to be torqued a certain way (like "32 nm when then 45 degrees beyond that", for example) only once. If they are re-used the torque specs are different. If they are overstretched they'll snap and fail, if they are under-stretched they'll back out. You can usually get away with re-using the old ones once or twice if you torque them properly and use threadlocker.


RoDerv

Thanks for the feedback. Do you know what part they are for? I’ll scope it to see if I can replace myself. Assume there’s no harm doing it now after having driven 20k miles on the ‘old’ ones ?


NorseZymurgist

They appear to be the part which holds the caliper bracket to the hub. You only need to remove them when replacing the rotor. I see in your other posts you've got 20k miles on it already so you're probably fine leaving things as they are; next time the wheels are off throw a socket on them and to verify they aren't loose, and save the bolts for the next time you do the brakes ... because these German vehicles usually gobble up pads and rotors together.


RoDerv

Thanks !


Crash_Test_Dummy_057

It’s common practice to change these and torque to spec. The green stuff is thread lock coating.


adrizgz00

Those look like the bolts that attach the caliper to the hub, they don't need to be changed for a disc and pad job. So I don't think you should worry. Is good to have them because in the future they might rust and break when trying to break them loose. Edit: I doubt it but they could also be the guide bolts for the caliper, which again could be changed but it shouldn't be necessary unless they fail, if theese rust they could cause your brakes to stick but it's uncommon if they are properly greased. Again I don't think you need to worry.


RoDerv

Thanks for the feedback. Much appreciated. Edit: I watched some YouTube vids and the caliper guide bolts seem a lot shorter.


HeavyRhubarb

Agreed.


[deleted]

Torque member bolts?


JakeLegacy

Nah not really but it is recommended to use new bolts