Radiator Caps

If you're looking for in-depth information and advice on everything having to do with radiator caps, take some time to read through the insightful articles listed below.

Radiator caps perform a simple yet vital purpose in keeping your vehicle running. Designed to allow expansion and contraction of the radiator fluid while keeping it pressurized, the cap helps keep the coolant at the proper temperature and the engine performing optimally.

The radiator cap helps to increase pressure in the cooling system. As pressure of a liquid increases, its ability to receive greater amounts of heat without boiling also increases, thereby improving the system's cooling capacity. The cap includes a spring valve that moves upward as pressure increases, eventually allowing coolant to escape if the pressure rises too high. It also includes a valve to release a vacuum that builds up inside the radiator as its temperature changes.

The cap can be opened and removed by turning counterclockwise. Never open the cap on a hot engine, as you might scald yourself with the fluid. Manufacturers design most cars to enable adding coolant without removing the radiator cap. A clear spillover tank with a twist-off cap fits this purpose.

Taking the cap off is necessary for inspection. Overflowing coolant or leaks from the cap warrant an examination. Look for warping or corrosion of metal that allows coolant to leak past seams. Look for tearing in the rubber seals. Test the spring valve to ensure it moves. Replace the cap if it fails these tests.

Auto parts stores sell caps at prices ranging from under $10 and up. Shoppers can even bid on radiator caps with an eBay account. With a part guide, you can find your vehicle make, model and year and determine the correct part number to order. For the enthusiast wanting to add fashion to his engine compartment, companies offer custom radiator caps.

Before a breakdown occurs, consider checking the radiator cap using the techniques described above. Be sure to wait until the engine cools completely before opening. By keeping the radiator cap and other components in good condition, you'll keep the car running and gain an appreciation of the modern cooling system?s ability to mitigate extreme combustion heat.