Supertech Nissan 6mm Viton Exhaust Valve Stem Seal - Single (Drop Ship Only)

When you're rebuilding the top end of your Nissan engine, especially if you're dealing with worn valve guides or just want to ensure a clean burn, replacing the valve stem seals is a critical step. These Supertech seals are made from Viton, a material known for its excellent resistance to heat and oil, which is exactly what you need where the exhaust valve meets the valve guide. A good seal here is key to preventing oil from getting past the valve stem and into your combustion chamber, which can cause blue smoke on startup or excessive oil consumption.

This particular seal is designed for a 6mm valve stem, a common size in many Nissan engines. Viton is a smart choice for exhaust side seals because the exhaust valve operates at higher temperatures than the intake valve. The material holds up well under these conditions, maintaining its sealing properties over time. While these are sold individually, it's a good idea to replace them on all the valves you're working on to ensure consistent performance across the board.