Coolant and fans won't turn on Options

[chris32880]

Car overheated other day and it was leaking, it is leaking out of the plastic white looking coolant low to full tank it has a whole right at the top, not sure if the hole is plugged on other celicas but it's leaking from there, the fans are not kicking on either everything else is fine, please show me pic of where the fan sensors are so I can get them from the junk yard

[chris32880]

So news new thermo, new timing belt/water pump kit being installed tomorrow I already have everything off and then, no leaks in the top or lower radiator hose, the fans work, if I still overheat tomorrow like I think will happen, what's next? No coolant is leaking internally my motor oil I changed while over heating period to make sure, so I know it's not going to be a head gasket, my next guesses would be, one of the sensors, radiator itself, or one of the metal pipes runs from heater core and 2 where the thermo is, could have busted one, but I don't wanna buy parts and not have it fixed