Hi there, Im after some advice. I have a lupo s 1.4 16v and had oil in with my spark plugs. I removed the plugs, cleaned out the oil and realized to repair the fault I needed to remove the rocker cover, fit the sealant and replace the cover, which I did. I replaced everything back to how it was. I then went to start the car, heard a pop from the engine and blue smoke came from the air filter....... it now does not start, fire up or anything, just sounds ropy when i try to turn him over??????? Have I well and truelly screwed my engine???? Many Thanks in advance. Lee