The Colombian has signed a six-month loan deal with Aberdeen.
The 6ft 3ins star - who signed for City from Huracan in January 2010 - told the Scottish Sun: "I don't want to stay at Manchester City and be third or fourth choice.
"Obviously I have a contract and would honour it if I have to. But I am in advanced talks about a loan move.
"I had the opportunity of playing in the lower league in England or in the top league in Scotland - and I have decided to go to the Scottish Premier.
"I want to play at a high level, so playing in Scotland suits me. If I do well there, I could move permanently.
"It's frustrating not to play. You train all week, but then have to sit in the stand.
"But on the other hand, I have gained many friends and made invaluable experience with excellent coaching at City.
"My wife has a child on the way and we are ready to start a new chapter."