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06 4.0L ~70k miles. My coolant level keeps dropping but I can't seem to find a leak anywhere. The thermostat housing looks new although I haven't changed it. Got the car at 50k. Hooked up the pressure tester and it held strong. There does appear to be a little bit of corrosion inside the fan shroud at the bottom but I really can't see in there well. Any ideas?
mines does the same, i took a sample down to ford and firestone and they checked my vehicle and everything was fine. they told me that if you use the a/c it drips water even when the vehicle not being used like a/c hanging out from your window house window drips water on the ground same thing, but my coolant level were normal so mines might be the same situation as your or not
this copper stuff works great for fixing small leaks in the head gasket or cracked head. Add it straight to the antifreeze. I did it a year ago-- no more antifreeze usage..