well , im stumped - i have just picked up a swet deal on 4 new wheel covers off of a member here , here is the problem , the valve stem knotchs dont line up nor do the plastic nuts go in deep enuff to grab onto the threads - didnt realize they made several different stock 16inch rims - is there a cheap fix?

 

Do you have pics of the wheel covers and did they come off an HHR?