Fascinating! I just did my fall oil changed, looked right at the cooler, but never thought to inspect for leaks. I still have the noise encapsulation on mine, both parts in fact, which make leak discovery more difficult--one looses out on the subtle drips on the floor.

This is defiantly worth a check see. The thermostat is up top, but I never chased the lines down to the cooler, nor inspected the cooler. Woefully thought about changing the tank screen the other day, gave it a good shot, but with out a lift it looked like pandora's box if the line didn't brake free and the screen started turning first, I need a crows foot and a better line wrench, and now yet another empty fuel tank.