Volkswagen Repair: Cooling system, coolant temperature sensor, coolant leak

Question
I've had a coolant leak for a little while.  I thought that it was in the expansion tank, because I would find coolant puddled around and below where the tank sits.  I just replaced the tank and still have a pretty good leak happening.  Can you give me a couple other suggestions.

Thanks,
Rob

Answer
Rob, thank you for your question.  The expansion tank is probably cracked at the bottom or you could be getting a boil over condition too.  There could also be a situation of the radiator is dirty inside or the coolant temperature sensor could also be going out.
Hope that helps