Thank you for the donation.
Here is a daigram of the thermostat housing and water pump. If leakages are around the area, the most likey source would be the water pump and the O rings for the coolant by-pass pipe.
Without a visual, it is not possible to determine waht could be the cause. Get a strong light and a small mirror to try to located the source.
Saturday, April 10th, 2010 AT 11:20 PM