Hey guys I need some ideas well I used easy out to get out 5/6 broken exhaust manifold stud 1 didn't want to come out but we kept trying at the end we gave up so left it in there and put everything back together started it up all good top up the coolant and WTF COOLANT leaking out of the exhaust manifold stud that we didn't take out but attempted to. Did my mate drill into the water gallery if the head? What now new head? Or can seal it up some how?