It is a lot as the friend Luisenriquez67 describes before it will be danced, the car works very well, I pisas the gas and responded very much, and does not miss smoke, do not worry, it is very difficult for the pistons to be given, because the blow of the piston with the valve carried the valve, it is the one that felt it for the blow and that is why So if the car is now normal, forget the problem ... luck. ,,,,,,,,,,,