93 XLT 4.0 Coolant leak
Sorry to bring an old post back from the dead, but I'm having a very similar issue except that it is a consistant leak. Tmosesjr, did you ever get it fully repaired and if so, what was the fix?
Here's my story...after parking one night and getting out of the vehicle I smelled coolant a heard hissing coming from the engine area. Looked under the engine and noticed a stream of coolant flowing out and large pool on the ground. After the engine cooled I topped off with water and was able to drive home.
I pressure checked the system and found that a hissing sound was coming from the thermostat housing area more on the drivers side. I've replaced the thermostat, upper and lower radiator hoses, and water pump gasket. I inspected the thermo housing, heater hoses and temperature sensor, all look good. After putting everything back together today I filled with water and was going to pressure check again but water was flowing out still. Its coming from the drivers side of the engine where the screwdriver is inserted (see photos). I have no idea what else to look at other that head gasket or intake gaskets. Thanks for your help.