The CORTECO 49472017 valve stem seal is a critical component for maintaining engine health. Its primary function is to seal the valve stem where it passes through the cylinder head, preventing lubricant from leaking into the intake or exhaust ports and subsequently the combustion chamber. A worn or damaged valve stem seal can lead to increased oil consumption, blue smoke from the exhaust, fouled spark plugs, and reduced engine power. Replacing these seals can restore proper engine operation and help pass emissions tests. Crafted with durable materials, this CORTECO seal is built to withstand the high temperatures and pressures found within the engine. Proper installation is key to ensuring its effectiveness and longevity, contributing to the overall reliability of your vehicle's engine.