Thanks for everyone for the reply!
It was a transmission hose, I damaged it when pushed down the fan shroud.
It was ATF.
The radiator had the metal connection in a good angle to open the drain, but too high for the fan shroud. I adjusted, replace the transmission lines, added ATF and coolant...
Hello everyone. Newbie learning to do mechanical work by myself.
On Saturday I replaced my radiator, hoses, water pump, thermostat, on my 97 LX450. Everything went smooth and simple.
I refilled it, warmed up, took it for a drive, all good.
Sunday morning warmed up two times, everything ok...