1994 honda civic ex. One of the head cover bolts won't thread and tighten. I actually just wiggled it free and up and out. What kind of damage if any, will this do if the car is continued to be driven?

 

Which one is it? One of the two on rear or one of 3 towards the front? U might get lucky not to have a leak but you might should think about tapping it out an re threading it. But in my opinion the worst that can happen is a oil leak around valve cover gasket.