ok so my civic been sittin for a while and i open the hood and saw that the header was wet where it bolts to the head so i was like naybe it got wet so i cranck it and took it for a ride and came back home but today i cranck it and it was smokin inside the engine compartment and it was smokin comin out from header so i look closely and my header has a crack and saw oil can anybody tell me why this happen i mean it runs good and all but im lost