help with steering + brakes

[sam320i]

hi boys and gals...... just put some new wheels on my 320i and now wne i go round corners full lock (left or right) i canhear and feel a knocking coming from both sides!! nothing is rubbing cos i've checked and the brakes are making a grinding noise but there pretty new and look ok?? any help would be great as i gotta drive upto santa pod at the end of the week.
Cheers
Sam

[handpaper]

Wheel bolts torqued correctly?
What wheels are/were they?

[sam320i]

they are valbrem wheels not sure which model but came off a 325i cab, i now know that the lower balljoint is fu%"*d now so would that be whats causing the knocking???

[Chris-W]

That would definitely cause the knocking you describe. Also shakes under braking.

[sam320i]

yea a bit mate i know one of the wheels has a slight buckle which would make it shudder a bit! cant figure out why the bloody brakes are grinding tho they're only about 3 months lod and look alright??

[Chris-W]

Doe they grind all the time? If so it's likely just a backing plate is making contact with a disc.

[Martinaston]

"just the backing plate making contact"
then that would surgest your wheel bearing is shagged and if its not then fitting a buckled wheel will soon fuck it up.
If you didn't have the rubbing before you changed the wheels what do you think it could be

Check the steering rod and the inner edge of the rim.

[Chris-W]

Wouldn't be the first time a backing plate has been bent a bit when wheels are changed.