The radiator cap is more than a cap for your radiator; it keeps your engine cool by sealing and pressurizing the coolant inside it. It is designed to hold the coolant in the radiator under a ...

We may receive a commission on purchases made from links. Whenever I get my hands on a newly bought used car, my checklist includes inspecting a few underhood items as part of the "getting-to-know-the ...

As engines get very hot, coolant helps distribute heat to help prevent overheating and engine damage. It also adds antifreeze protection and acts as a lubricant for some of the engine’s components. If ...