Overheating Altima Help!

[Del Monte]

I have a 99 Altima. Was driving one day and the belt broke. when the belt broke it also broke the alternator pulley and idler pulley. I replace both belts, the alternator and the idler pullet. I took it for a test drive and the car overheated, and the Radiator busted. I also notice the sensor near the alternator on on the upper radiator hose was broken. so i replaced it. then i put everything back and started the car and noticed smoke coming from the top of the engine and near the header. the fans also came on after 15 mins. So I replaced the thermostat. still the same. I tried flushing the coolant from the radiator and try to bleed it. still the same. I am not sure what to do next. what else could be wrong? please help!.

[wade001]

if the coolent is low after running the car check the radiator cap, might be bad(lets coolant out but not back in)

[Del Monte]

Its not low. I did replace the cap when I replaced the radiator

[lino]

head gasket?