I think I've posted this before. '94 Ford Ranger 4.0 I'm losing about half a quart of coolant a day. It's not leaking out. Not a drop under the car. None in the oil. Nothing out of the tailpipe. As a matter of fact, after the truck is warmed up, no smoke is visible coming out of the tail pipe. The passenger side carpet is bone dry. Can't small anything when I turn my heater on. I just installed a new overflow tank and hoses. No leak there.. Out of desperation I'm going to do the Liquid Glass treatment next weekend... Any mechanics with experience on this? I'm frutrated..