NOK 49442388 Valve Stem Seal

The NOK 49442388 Valve Stem Seal is a precision-engineered sealing component designed to control oil metering to the valve stem interface in internal combustion engines. This critical engine component prevents oil from entering the combustion chamber while providing proper lubrication to valve guides, helping to maintain optimal engine performance and reduce emissions.

Key Features:

• Manufactured by NOK, a globally recognized leader in seal technology and OEM supplier
• Controls oil leak rate for proper valve stem and guide lubrication
• Prevents engine oil from entering exhaust and intake systems
• Designed to withstand high temperatures and pressures in modern engines
• Helps reduce oil consumption and minimize harmful emissions
• Compatible with both gasoline and diesel engines

Construction:

• Typically manufactured using fluoroelastomer (FKM/Viton) or other high-performance synthetic rubber materials for superior heat and oil resistance
• Features integrated self-tightening spring or steel wire for consistent sealing pressure
• Low-friction design reduces valve train wear and improves engine efficiency
• Engineered to handle valve operation rates up to 100,000 cycles per hour

NOK valve stem seals are manufactured to exacting OEM specifications and quality standards, ensuring proper fitment and long-lasting performance. Proper valve stem seals are essential for maintaining engine compression, preventing excessive oil consumption, and extending engine life.