Seat Leon Problems with Turbo

I just changed the turbo to my vehicle is a Seat Leon, but a few days ago I realized that I take oil for the escape, then I opened the cooling deposit and I realized that I also had oil, many tell me that it is the engine's button, but I have my doubts since Casalemte was with the change of turbo that gave me that problem, the car did not hear me. What can be the problem?

Friend you would have to do a compression test to know if there is a problem in the cylinder head

The compression test is not very effective when oil pass to the cameras since the cell itself escapes the escape, but it is an inequivococus symptom of cylinder head, except with the siorx that you have a heat exchanger, or that the turbocharged and allas inverted the hoses inverted the oil in the water and that of the water in the oil.