SlotForum banner rear wheel grub screws too tight

2768 Views 34 Replies 21 Participants Last post by  Martyn_
I've just bought a new Audi R8C (CA12C) which has had its rear wheel grub screws over-tightened in the factory. I've ruined three new allen keys trying to loosen the screws, only have two undamaged allen keys left and don't want to ruin those. I need to loosen the grub screws to reposition the rear wheels, which have been fixed too far inboard at manufacture.

I've tried alternately gently heating and cooling the axle and wheel assembly, which succeeded in loosening one screw, but the other is still jammed tight. Any ideas how to undo it?
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And I'd probably not be using that eBay seller if I'd been left out of pocket by them on three occasions!
Glad to see all sorted now, have you tried grinding a flat on the axle yet?
I'm slowly learning the trick of getting the torque correct - had a few tears along the way, but I'll get there. Hobby has seen the result of my over-zealous tightening, first hand.

I've got the MBSlot torque wrenches - I find them fine for NSR larger grub screws, but I manage to over-torque the smaller Slot.It grubs. I wonder if I can easeit back a few tenths of a NM?

John- I don't normally agree much with gooners, but funnily enough I do that myself, just out of logic - and I'm a real wet behind the years slotter. I thought back to how my old Laverda triple used to just about not shake itself to bits by staggering the pistons at 120 degree intervals.
QUOTE (Dopamine @ 19 Sep 2012, 11:26) <{POST_SNAPBACK}>... Instead someone suggested knocking the axle out of the hub. That worked perfectly and the car is now happily purring around my track, still using the original grub screw and hub, with no damage done.

Glad you cleared up that bit, I made an assumption that the screws had been removed but the axle was not shifting in that instance. I need to go back and reread that whole section of the thread.
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