Just wondering if anyone else has had this issue or knows what it could be.

I have a 89 4.9, the coolant was all of a sudden empty the other day and it seems to be going down, i don't have any leaks on the ground where i park it and i can tell cause there is no green snow, just wondering what this could be already checked the oil and it isn't milky or anything so i'm pretty sure its not leaking into the oil, just curious of what it could be

 

All of the coolant? Or just the overflow resevoir?

Have you flushed and filled the coolant recently? It could have had an air pocket that finally made it's way out. I'd check the radiator itself and see how much it takes to top it off.

 

Since you have no visible leaks, it might be water pump or heater core. Have you checked the floor on passenger side? If it's dry, probably the water pump is the cause.

 

You can pull the spark plugs and check them for glycol deposits to see if the engine is burning it due to a bad head gasket or cracked head.

 

well when i checked it that night the resevior was empty then checked it in morning and had to fill some of the radiator then had to top it off again like 2 days later

 

well all i got to say is that its going SOMEWHERE
unless some kid drinks it out with a straw
look on the ground, put some towels or kitty litter under it, it may be evaporating off the ground and you cant see it
pull your plugs and look for anything out of the ordianry
check your oil for any milky looking fluid

like that ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑ ↑↑↑↑↑↑↑↑
check your exhaust for gray deposit

 

Freeze plugs?

 

some f150 the radiator leaks on the side by the upper radiator hose, my f150 leaks there but there is no fluid on the ground. also check your oil, you may have a "swapping spit" issue.

 

ok not sure exactly whats happening but its stayed pretty much full lately, but when i started the whole issue it was almost empty

 

Found out the problem, it was squirting out of a gap in the hose coming from the top of the radiator then hitting the hood and dripping back down and collecting on the bumper and then i think burning up so there was no puddle at least i figured it out think i'm just gonna replace the hose