CHECK HOSES FROM RAD TO SEE IF THERE BOTH HOT.... U MAY HAVE A DEFECTIVE THER.MOSTAT.. IF NEED TO REPLACE, USE A FAIL SAFE TYPE...WHEN THEY FAIL .THEY STAY OPEN SO U DON.T OVER HEAT UR ENGINE &DO ALOT OF DAMAGE CAUSE THERE,S SOME MUCH ALUM IN ENGINES THESE DAYS... ALSO CHECK FOR AIR LOCK IN THE SYSTEM...LEAVE RAD CAP &RUN THE ENGINE TILL IT,S HOT.. WHILE THE FLUID IS CIRCULATING, IT SHOULD EXPELL ANY AIR IF ANY IN THE SYSTEM, GD LK, CHARLIE