really loose? dont attempt to drive it then, you may hear it smacking on the lower cover, inspect it good, spin the belt by the motor all the way around, if it looks decent, above the crankshaft is a 1.5 inch plug in the cover , remove that, loosen the 14 mm bolt inside it by one turn, put a 12 mm wrench on the cam and move it one half tooth, tighten the 14mm bolt to 32 fp torque, hope that helps ya, easier said than done i know, if it jumps, let me know, .