When i was unbolting my stock throttle body that has never been removed, i unbolted all the nuts and before i even broken the gasket i noticed that some coolant fluid thatstarting to leak from the bottom of the tb. so i didnt do anything. and i put everything back together. When i started the engine i noticed it idle higher then normal. and i started to hear a hissing sound. when i turned of the engine it the hissing was still there but died down. i just got done replacing the pcv. is the coolant leak normal when takeing off tb? what is the hissing sound. is it the throttle body gasket?