I forgot, There are several parts to your turbos radiator. There is a builtin oil coller on the passenger side and the tranny cooler on the driver's side.

If this is a "new" radiator and old coolant hoses, check the clamps. They must be reclamped exactly as it was originally. Moving the clamp will cause the hose to fail prematurely and will leak. Do NOT overtighten the clamp, as this will cause the plastic extension from the radiator to crack, and then you will need a new radiator. What a poor design!

It is possible that the oil cooler line is leaking at the connection. It has been several years since mine was replaced and I forgot if the oil line has an O ring or not. You might want to replace the retaining clip. Just pick one up from dealer parts and ask them if there is an O ring.

Also check the cap for the overflow bottle. Mine cracked and allowed the pressure to escape resulting in hotter than normal antifreeze.

Klaus