Toyota yaris overheated ...

Good night friends, I have an automatic yaris which overheals on the road, I stopped and had consumed the refrigerant, put more refrigerant, and followed, then he warmed more and stopped him, how the only thing I see is like an oil boat in the radiator, the serpentin of the oil of the box is split? How do I verify this?

Thanks in advance ...

I did not understand the boat, do you have oil mixed with the refrigerant?
If so, you have the blow joint and pass the lubrication oil to the water circuit because it has more pressure, I do not think it is the serpentin since the transmission oil has so much pressure that the radiator would burst if it invaded it.

But as a diagnosis?

Lobo5626 wrote: But as a diagnosis?

I have already given the diagnosis according to what you say.
You have not answered the question:

Do you have oil on the radiator ??????????????????

I have not reviewed that ...