2003 golf tdi, 126,000 miles, belts replaced at 95,000. I have had a coolant leak for over 3 months, I believe it is coming from the upper part of the engine above the transmission, but I just can not find the starting point. Has anyone had any leaks before, or ideas on where is is from. I have gone through about 2 gal this winter. I have the coolant changed by a mechanic last summer when there were no leaks. It is VW coolant.