This ELRING valve stem seal, part number 170.020, is engineered to prevent oil from entering the combustion chamber through the valve guides. Properly functioning valve stem seals are crucial for maintaining engine oil levels, reducing oil consumption, and ensuring clean emissions. This component plays a vital role in the overall health and efficiency of your engine. Crafted from durable materials, the 170.020 seal offers excellent resistance to heat and oil, providing reliable performance under demanding engine conditions. Its precise fit ensures effective sealing, contributing to consistent engine operation.