Cummins Valve Stem Seal 4003966 – Durable DCEC Sealing for Engine Valve Systems
The Cummins Valve Stem Seal 4003966 is a vital component in many Cummins parts systems, specifically designed for DCEC engines. It provides a tight seal around the valve stem, preventing engine oil from leaking into the combustion chamber. This small but essential Cummins genuine part helps maintain optimal engine performance and clean combustion.
🔩 Specifications
- Part Name: Valve Stem Seal
- Part Number: 4003966
- Engine Brand: Cummins
- Engine Series: DCEC
- Category: Cummins genuine parts
- Primary Function: Oil sealing for valve stems
⭐ Key Features
- Designed for use in DCEC parts systems
- Excellent oil control at the valve stem interface
- Made with high-temperature, wear-resistant materials
- Reduces oil consumption and harmful emissions
- Maintains long-term seal integrity under engine heat and pressure
⚙️ Technical Insights
This Cummins genuine part plays a critical role in the engine’s valve mechanism. As part of a larger Cummins parts assembly, it ensures just the right amount of oil reaches the valve stems—no more, no less. Too much oil leads to carbon buildup and emissions, while too little causes wear. The 4003966 valve stem seal strikes the perfect balance, which is why it’s a trusted component in many DCEC parts configurations.
🛠 Application Scenarios
- Used in valve systems across a wide range of DCEC engines
- Ideal for buses, generators, construction equipment, and heavy-duty trucks using Cummins parts
- Recommended for engine overhauls or routine valve seal replacements
- Helps reduce oil-related smoke and meet emissions standards
- Compatible with other Cummins genuine parts in DCEC maintenance kits
📦 Availability
This Cummins Valve Stem Seal 4003966 is in stock and available for global shipping.
To ensure correct fitment with your Cummins parts configuration, please provide your engine serial number (ESN). Our support team is ready to assist with verification.
