What Does a Radiator Cap Do?

As mentioned above, the radiator cap is a key component of your Kia car’s cooling system. The radiator cap applies the correct amount of pressure to ensure the engine cooling system is working properly. By using pressurized coolant fluid or antifreeze, the cooling system keeps excess heat from collecting around the engine, which leads to overheating and possible failure.

If you plan to examine your radiator cap, be sure your engine has completely cooled before opening the hood or touching the radiator cap to avoid burning your skin. Obvious damage to your radiator cap could indicate it’s time for a replacement, especially when in conjunction with other symptoms.

Bad Radiator Cap Warning Signs

Since the radiator cap serves as a vital component of the cooling system, a variety of signs may indicate it’s time for a replacement. A few of the most common bad radiator cap warning signs include the following:

• Engine overheating or steaming
• Low coolant levels or leaking
• Head gasket failure
• Damaged radiator hose

If you notice any of these issues, bring your Kia in for an inspection as quickly as possible. We’ll complete any necessary repairs or replacements to mitigate further damage and keep you safe out on the road. Whether it’s a bad radiator cap or another part, our expert technicians can help determine the cause of the issues and talk through your options with you.