The CORTECO 49472874 valve stem seal plays a critical role in maintaining the health of your engine. Its primary function is to seal the valve stem, preventing lubricating oil from the valve train from seeping into the intake and exhaust ports, and ultimately the combustion chamber. When valve stem seals degrade or fail, oil consumption can increase significantly. This can lead to blue smoke from the exhaust, fouled spark plugs, and reduced engine efficiency. Replacing worn seals with a high-quality part like this CORTECO unit is crucial for restoring proper engine operation and preventing further damage. Crafted with durable materials, the 49472874 seal is built to withstand the demanding conditions within the engine, including high temperatures and constant exposure to oil and fuel. Proper installation is key to its effectiveness and longevity, ensuring a reliable seal for thousands of miles.