Vehicle radiator assembly and cooling system having the same

A vehicle radiator assembly, comprising:

• a common inlet tank including:
• a high temperature inlet chamber and a low temperature inlet chamber;
• a common outlet tank including:
• a high temperature outlet chamber and a low temperature outlet chamber, the common outlet tank configured to be spaced apart from the common inlet tank;
• a high temperature radiator core including:
• a plurality of high temperature tubes connecting the high temperature inlet chamber and the high temperature outlet chamber, and a plurality of high temperature cooling fins arranged with the plurality of high temperature tubes;
• a low temperature radiator core including:
• a plurality of low temperature tubes connecting the low temperature inlet chamber and the low temperature outlet chamber, and a plurality of low temperature cooling fins arranged with the plurality of low temperature tubes;
• and
• a bimetal interposed between the high temperature radiator core and the low temperature radiator core,
• wherein when a temperature of a high temperature coolant flowing into the high temperature radiator core is equal to or higher than a reference temperature, the bimetal is deformed and configured to thermally connect the high temperature radiator core to the low temperature radiator core.