Sort:  

It could be a gasket failure.
It also could be a modified or missing crankcase vent. Sometimes there is a PCV valve that is clogged. The crankcase vent allows excess pressure in the motor to be vented. If this vent is malfunctioning, clogged, or modified, the engine pressure can become excessive and force oil out.

oK, thanks a lot I really appreciate your help
Regards, I´ll tell you soon
Greetings