ok so i has to questions that need to be answered.
i own an ADM AE86 with 4AC boat anchor.


1.swap rims over, my mate at campsie tyre place put on temp lug nuts.
i got the proper ones, but he rounded 2 nuts! the problem is that they are almost completely recessed in the rim.

i'm sure people have had rounded nuts before, so what methods have people used to remove rounded nuts.

2. My motor has started making a high pitched whistle, after it has been warmed up and driven for a couple minutes. this went for a week,
so i check me oil and it was below empty.
have topped up oil, but it still makes the same noise, just a little quieter.
is it possible i has done some damage to the motor?