This ELRING valve stem seal, part number 136.940, is engineered to prevent oil from entering the combustion chamber through the valve guides. Proper sealing is crucial for maintaining engine compression, reducing oil consumption, and ensuring clean emissions. Crafted from durable materials, this seal is built to withstand the high temperatures and pressures within the engine. Its precise design ensures a perfect fit and reliable function, contributing to the overall health and efficiency of your engine. Replacing worn valve stem seals can resolve issues such as blue smoke from the exhaust, increased oil usage, and rough idling. This ELRING component offers a dependable solution for maintaining your vehicle's engine.