02 Ls 3.9 v8 was over heating. So I had a thermostat and flush done. Eventually saw that it leaked coolant, as long as i kept coolant in it, it wouldnt overheat. Leak got too bad to keep coolant in it so i replaced the degas bottle (Which was cracked) and both hoses going to it. i bled the system by the book. Still overheating if not overheating worse. I did a chemical block test on it, no combustion gas in coolant so it's not the head gasket. Im about to put in a new thermostat and housing and coolant flange and hoses. Any ideas? I'm seriously lost. I figured since it been hot since the new thermostat i should go ahead and replace it again. It takes about fifteen minutes exactly of driving to get hot. I will almost pay for help at this point.