Replacing my throttle body defrost kit because it is yet again spitting coolant. Problem is, the three little bolts are being a pain. I put a 7mm socket on it, almost fits snug, but a little loose, dont want to round off head. tried 6.5mm, too small, and an 8 is too big. I give up. Anyone know what size these things are? This is the part that is just below the throttle body with the two prongs comming out with coolant lines attached. Thanks!