I have a 1994 f150 5.0 4x4 that has a coolant leak. It has a steady drip coming out of what looks like some kind of sensor above the oil filter. Do you guy know what sensor that is and how easy it is to replace? Any helps welcome. Thanks. Pics below.

 

You sure it's coolant? I'm pretty sure that is the oil pressure switch. Coolant shouldn't be that low in the block. Pull the wire off and fire it up, I bet your oil pressure gauge won't work. It's just threaded into the block so try snugging it down to see if the leak stops. It's easy to change.