DA300ES

HI EVERY ONE

I AM NEW IN HERE AND I GOT A QUESTION. I WANNA KNOW ANYONE GOT THIS HAPPEN LIKE MINE 92 ES . MY CAR OVERHEAT IF I KEEP DRIVING IT FOR AN HOUR AT 60MPH. SOMETIMES LIKE 30 MINS. EVERYTHINGS FINE OTHER THEN THAT . I REPLACED ALMOST EVERY THING UNDER THE HOOD EXCEPT THE RADIATOR AND THE ENGINE . THE THERMOSTAT ALSO BEEN CHANGED .SHOULD I CHANGE THE RADIATOR OR FLUSH IT FIRST ??? . NEED HELP !!!!!! ALSO BEST LEXUS FOURM EVER !!!!!!!!!!

Pheonix

1) quit yelling
2) you blew a head gasket, or two
3) click the picture in my signature & search for blown headgasket