A Valve Stem Seal is a component that helps to prevent oil from entering the combustion chamber. It is located at the top of the valve guide and is designed to fit tightly around the valve stem. The Valve Stem Seal also helps to maintain engine compression and proper engine performance.

Attributes:
• Withstand high temperatures and pressures.
• Maintain a tight seal around the valve stem.

Applications:
A Valve Stem Seal acts as a barrier between the valve guide and the valve stem in an engine's cylinder head.