Product Description
Cummins 3920868 OEM Exhaust Valve – 5.9L 12-Valve (1989–1998) / 4BT & 6BT
The Cummins 3920868 OEM Exhaust Valve is a genuine Cummins replacement exhaust valve engineered for 5.9L 12-Valve 6BT Cummins engines, 3.9L 4BT applications, and other Cummins B-Series diesel engines. Manufactured from high-temperature, heat-resistant materials, this valve is designed to maintain proper sealing, valve train geometry, and long-term durability under the extreme exhaust temperatures generated by turbocharged diesel engines.
Whether you're performing a complete cylinder head rebuild, replacing worn valvetrain components, or restoring a high-mileage 12-valve Cummins, the genuine Cummins 3920868 exhaust valve provides OEM fitment, reliability, and performance. Designed to meet original Cummins specifications, this valve helps ensure proper exhaust flow, combustion efficiency, and long service life.
Features
- Genuine Cummins OEM exhaust valve
- Direct replacement for factory-installed exhaust valve
- Designed for high-temperature diesel engine operation
- Manufactured from heat-resistant alloy materials
- Maintains proper valve sealing and exhaust flow
- Ideal for cylinder head rebuilds and engine overhauls
- OEM-quality fit, finish, and durability
- Compatible with 4BT and 6BT B-Series engines
- Designed for long service life in turbocharged applications
- Trusted Cummins Genuine Parts reliability
Fitment
- 1989–1998 Dodge Ram 2500 5.9L 12-Valve Cummins
- 1989–1998 Dodge Ram 3500 5.9L 12-Valve Cummins
- Cummins 6BT 5.9L B-Series engines
- Cummins 4BT 3.9L B-Series engines
- Industrial B-Series Cummins applications
- Agricultural and commercial equipment using Cummins B-Series engines
- Direct replacement for OEM exhaust valve applications
Note: For industrial, agricultural, and off-highway applications, always verify compatibility using the engine serial number (ESN) before ordering.
What's Included
- One (1) Genuine Cummins 3920868 Exhaust Valve
Specifications
- Manufacturer: Cummins Genuine Parts
- Part Number: 3920868
- Component Type: Exhaust Valve
- Engine Compatibility: 5.9L 12-Valve 6BT, 3.9L 4BT, B-Series Cummins
- Valve Head Diameter: 41.88mm
- Valve Stem Diameter: 7.95mm
- Overall Length: 128.90mm
- Material: High-Temperature Heat-Resistant Alloy
- Application: Cylinder Head Rebuilds and Engine Overhauls
- Primary Use: OEM Exhaust Valve Replacement
- Engine Family: Cummins B-Series
Cross Reference Numbers
3920868, 3802356, 3901607, 3901608, 4895188, 4994143, 191968, M-3920868, M-3802356, 6732-41-4210
FAQ
Does Cummins 3920868 fit all 12-valve Cummins engines?
Yes. The Cummins 3920868 exhaust valve is commonly used in 1989–1998 5.9L 12-Valve 6BT Cummins engines. Always verify by ESN for industrial and specialty applications.
Does this exhaust valve fit 4BT engines?
Yes. This exhaust valve is used in many Cummins 4BT and B-Series applications. Compatibility should be confirmed by engine serial number for industrial engines.
Should exhaust valves be replaced during a cylinder head rebuild?
Yes. Exhaust valves are exposed to extreme heat and wear over time. Replacing worn valves during a rebuild helps ensure proper sealing, compression, and long-term engine reliability.
Do valve seats need to be machined when installing new exhaust valves?
In most cases, a proper valve job is recommended to ensure correct seating, valve height, and sealing performance when installing new valves.
Are OEM Cummins exhaust valves suitable for towing and performance applications?
Yes. Genuine Cummins exhaust valves are designed to handle normal towing, work, and mild performance applications while maintaining OEM durability and reliability.
Why choose a genuine Cummins exhaust valve?
Genuine Cummins components are manufactured to original specifications, ensuring proper fitment, material quality, durability, and long-term engine performance.
