spent 2 hours on sunday tearing down my 98 16valve 1.6 sidekick engine cause it has a blown head gasket got the exhausts manifold off air intake radiator pulled valve cover off but when it came to the head bolts a 11 metric wont fit too small and a 12s too big American didn't work either is this a special tool i need to buy?

or is it a 12pt socket i need called Suzuki shop in my town he was no help and auto zone well you know how they are........... should i call Hawk Suzuki?

? i knew i was going to run in to this type O crap...
HELP!