Yes you can overtighten lugs but they shouldn't make the wheel not turn. You just won't be able to get the bolts off the next time you take you wheels off. I had a shop overtighten my lugs once and it was a pain in the ass to fix. 2 snaped off and 2 more I had to go get torched off. Tip never let a shop use an air gun on your lugs thats how they fucked mine up.