My truck is losing coolant and it seems like its settling in the engine valley cause theres never any coolant found on the floor.

 

rangers are infamous for a wierd dissapearing act with radiator fluid

 

rent or find a buddy that has a coolant system pressure tester and use it. you will chase youre taill trying to find a coolant leak without one unless its obvious. a coolant system pressure tester will give you an answer in a matter of minutes.

 

^^^ yep i have the same problem. in my truck but i dont worry about it.

 

Idk what motor you have but this could help

How To Replace the Upper and Lower Thermostat Housing on a Ford 4.0L V6 SOHC Engine

 

there is a dye that u can use a uv light for to find it or if ur running stght water and ur motors running hot it will evap esap if ur running a cheap aftermarket thermastat

 

x2 about that

add the dye to the coolant , then drive the vehicle to allow the dye to circulate all through the coolant.

you will need a pruple ultraviolet light to show where the coolant is leaking from