Hey I am in the process of changing my pan gasket and I am tryint to get the 2 bolts on the sttering rack that connect it to the subframe off. Problem is they are on extreamly tight. I just molested a 5/8 socket and its not budging at all. I hosed it down with liquid wrench and nothing. What Size is this bolt?? I am assuming its metric because the 5/8 dosnt fit to well, I dont think I have a socket in metric big enough.