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Hello Andy,
the torque setting for the front hub nuts on the VR6 is 90 Nm (66 ft Ib) plus 1/8 turn (45 Deg)
Please see pictures attached. :thumbleft:
Regarding the noise you have under hard braking this could be the dust / splash shield,
which is fitted directly behind the brake disc and bolted to the hub, you may have pressed the shield against the brake disc accidently,
coursing it to rub now and again.
or it could be where you've removed the whole front hub to replace the wheel bearing and not checked / reset the camber setting,
if you don't check or reset the camber which is fully adjustable on all the Corrado's the front wheel won't be central,
and you could be running the tyre on the outer or inner edge which can course a rubbing rumbling noise, under hard braking plus wear out your tyres unevenly.
The camber is adjustable by the two top hub bolts which bolt the hub unit to the front suspension strut.
I adjusted mine by using a small spirit level tapped to a straight piece of wood,
and was able to set my camber perfectly central.
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Please note you can only check / adjust camber and tracking on perfect straight level ground,
and make sure your tyre pressures are correct,
other wise you will just keep getting false readings as the car and ground have to be both level. :geek:
Andy the only other thing to do is to make sure everything you unbolted is done up and back in the right place.
The other thing I've had in the past is excessive brake dust on the front brakes coursing a grinding / rubbing noise,
all I did was remove the brake pads and clean the brake discs, calipers, and clean and regrease (using copper grease) the brake pads.
I hope this helps.
Good luck. :thumbleft:
Si