Cummins Expansion Plug 3900965, DCEC – Secure Seal for Engine Blocks
The Cummins Expansion Plug 3900965, produced by DCEC, gives engines a tight and lasting seal in core holes and water jackets. It prevents coolant leaks, protects the block from pressure loss, and helps the cooling system work at full strength. Because it comes as a Cummins genuine part, you can expect exact fit, steady performance, and longer service life. This plug is small in size but critical for keeping your engine in good health.
🔩 Specifications
- Part number: 3900965
- Genuine Cummins expansion plug
- Manufactured by DCEC
- Built from high-strength, corrosion-resistant steel
- Designed to handle pressure and heat cycles in engine blocks
⭐ Key Features
- Seals coolant passages tightly to stop leaks
- Resists rust, heat, and repeated stress
- Easy fit with OEM accuracy
- Long service life in harsh conditions
⚙️ Technical Insights
The expansion plug 3900965 plays a quiet yet vital role in the Cummins cooling system. Since it seals the casting holes in the block, it ensures coolant flows only through the planned passages. As a result, the engine avoids hot spots and keeps steady temperatures. In addition, the steel body holds its shape through pressure changes, while its simple disc design makes service quick and reliable. Furthermore, using Cummins genuine parts like this DCEC plug reduces the risk of failure that cheaper copies often cause.
🛠 Application Scenarios
This DCEC expansion plug works in a wide range of Cummins diesel engines used in trucks, buses, construction machinery, and marine gear. Moreover, it suits both preventive maintenance and full rebuilds. Whether your equipment runs on highways, job sites, or waterways, the 3900965 plug gives the seal you need for dependable performance.
📦 Availability
The Cummins Expansion Plug 3900965 is in stock and ready for global shipping. To make sure this plug matches your Cummins parts setup, please provide your engine serial number (ESN). Our support team will confirm fit and help arrange fast delivery of your Cummins genuine parts, including DCEC parts, to any location.
