Metal, and some higher quality hard-plastic valve stem caps, often have a rubber washer or seal inside to help make an airtight seal. This type of cap protects from dirt and moisture and also helps prevent air from escaping from a slightly leaking Schrader valve. In addition, the rubber washer or seal prevents the cap from loosening and falling off due to vibrations by acting as a cushion between the cap and the valve stem. Most caps, however, are a softer plastic designed for protection only and are not equipped with a separate seal.
Now where might that little valve stem cap have gone? What probably happened was the last time you took your vehicle in for service your tire pressure may have been checked, but the valve stem cap may not have been put back on.
It is also possible that the vibrations created by the spinning of your tires over thousands of miles caused the cap s to become loose and fall off. If your vehicle has a tire pressure monitoring system TPMS it is even more important to have a valve stem cap to keep the moisture and dirt out. If you take your vehicle in for a routine service that includes checking the tire air pressure, the valve stem caps should be properly tightened, and should be replaced if missing.
Here at Desert Superstore , we know that life can get a little crazy and there may come a day when you lose the cap to one of your air valves. Oh no! With that air valve cap gone, you are probably wondering if you are okay to drive your vehicle until you can find a replacement. We have good news for you! Your browser's JavaScript functionality is turned off.
Please turn it on so that you experience this site's full capabilities. Mobile Fitting Services We'll come to you. Free 5 Point Car Check. Price Drops prices cut on motoring essentials. Car Accessories. Exterior Styling. Top Rated. Product Type : Valve Cap Size : 13mm x 9mm.
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