The radiator cap is in charge of keeping the pressure in your cooling system. This is important because the more pressurized the coolant in your car is, the higher the boiling point, meaning it can store more heat. It also regulates the pressure so that, when there’s too much pressure, it moves the coolant to the overflow tank. If something goes wrong with it, here is how you can tell:
- Coolant leaks
- Symptoms of engine overheating (steam coming out from your car, temperature gauge goes up, unusual smell coming from the engine)
If you notice these symptoms, your radiator cap may be damaged and it’s time to get it replaced! It’s a lot cheaper to fix the radiator cap than it is to repair an overheated engine, so bring it in as soon as you start seeing symptoms!
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