FIG. 1 is a top perspective view of a radiator tank showing my new design, the broken lines are shown for illustrative purposes only and form no part of the claimed design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a right side elevational view thereof; and,
FIG. 8 is a left side elevational view thereof.