1997 Mg Mgf Hi Car Overheated Got Hot Melted Plastic Back Plate Blew Water Hose

hi my car overheated it got so hot it melted the plastic back plate and blew a water hose i stripped the head of and sent it away to be reconditioned and scimmed i put it back on with the upgraded gasket but now it wont start it sounds just like there are no spark plugs in it i can smell petrol also there is a spark to all plugs i am shure there is a compresion issue could it be the hydrolic tappets have not filled thanks