Hi everyone, glad to be apart of the forum.

I own a 53plate Audi A3 2.0TDI SE

I been told I have a turbo leak. The car sounds like a whining pig when in lower revs. I took it to the mechanic and he's says to try find if there are any common places for the leak before he starts working on it. We had look with the mirrors and can see black soot down the back of the engine and also noticed the black smoke from the same area when revving car.

Any help would be appreciated.

Thanks