Maybe the cap doesnt fit thight enough, mine leaked so I just wrapped some teflon on the neck where the cap sits and problem solved.
Check the passenger side carpet is it wet? Does your windshield fog up? It could be your heater core...
Although it is not likely, you might want to check your engine oil, just to make sure the coolant isn't getting in there.
Is it possible for the upper cooler to leak coolant into the tb? I seem to be loosing coolant but I can't find anywhere that it is leaking out.
My upper cooler nipple T's into my my radiador and overflow tank soooo how's that not connected to the heater core exactly? Unless my Ty is all messed up.
Si señor, understood 100%
Thanks.