It is very unsafe to drive with a broken radiator. Your radiator plays an important role in circulating and regulating the temperature of your engine coolant which, as its name implies, helps keep your engine cool. With a busted radiator, you run the risk of overheating your engine.
Driving with a too-hot engine can not only create dangerous driving conditions but also does some costly damage. To name just a few possible scenarios, it can:
Although it’s not fun to cough up money on radiator repair or replacement—usually between $500 and $3,000—it’s much cheaper than replacing your entire engine.