How do you tighten a ac belt on a 3000 GT?

To tighten the AC belt on a Mitsubishi 3000GT, first, locate the tensioner pulley. Use a socket or wrench to loosen the tensioner bolt, then adjust the tensioner to apply more tension to the belt. Once the desired tension is achieved, tighten the tensioner bolt securely. Finally, check the belt's tension to ensure it's not too tight or too loose.