Here’s an easy test you can conduct to quickly check your fan and radiator’s condition—no tools required. (Image/Flex-A-Lite’s YouTube Channel)

Did your engine temperature start unexpectedly pegging the needle? Do underhood temps creep up while you’re idling? Or do they spike at highway speeds?

Obviously, these symptoms all point to some sort of cooling system issue, but where do you start looking?

The fan folks over at Flex-A-Lite have a very simple test to diagnose the basics: Are your fan and radiator up to snuff?

It’s quick and easy—and a no-brainer before you go pulling hoses, swapping water pumps, and tearing apart your engine’s cooling system.

Check it out below: