Product Description
Cummins 3940059 OEM Camshaft Bushing (Thick) – 5.9L/6.7L ISB (1997.5–2018)
The Cummins 3940059 OEM Camshaft Bushing (Thick) is a genuine Cummins replacement component engineered to provide proper camshaft support, oil control, and long-term durability in 5.9L and 6.7L ISB Cummins engines. Designed for applications requiring the thick-wall camshaft bushing configuration, the 3940059 helps maintain correct camshaft alignment while reducing wear on critical valvetrain components.
Whether you're performing a complete engine rebuild, correcting cam bore wear, or restoring factory oiling and camshaft stability, the Cummins 3940059 delivers the precision machining and OEM reliability expected from genuine Cummins components. This thick-wall design is commonly used in specific ISB engine configurations and should always be verified by engine serial number (ESN) prior to installation.
Features
- Genuine Cummins OEM component
- Heavy-duty thick-wall camshaft bushing design
- Maintains proper camshaft alignment and support
- Helps ensure consistent camshaft oiling
- Designed for long-term durability and wear resistance
- Precision-machined to Cummins specifications
- Ideal for engine rebuilds and camshaft repairs
- Direct replacement for applicable ISB engine applications
- Suitable for stock and mild performance engine builds
- OEM quality and fitment
Fitment
- 1997.5–2002 5.9L 24-Valve ISB Cummins
- 2003–2007 5.9L Common Rail ISB Cummins
- 2007.5–2018 6.7L ISB Cummins
- Dodge Ram 2500 and 3500 applications
- Industrial ISB and B-Series Cummins engines
- Agricultural and construction equipment utilizing ISB engines
- ESN-specific applications requiring thick camshaft bushings
Important: Camshaft bushings vary by engine serial number and machining requirements. Always verify fitment using your Cummins ESN before ordering or installation.
What's Included
- One Genuine Cummins 3940059 Thick Camshaft Bushing
Specifications
- Manufacturer: Cummins
- Part Number: 3940059
- Component Type: Thick Camshaft Bushing
- Material: OEM Precision-Machined Bearing Material
- Application: Camshaft Support and Alignment
- Installation Type: Press-In Camshaft Bushing
- Cooling System Compatibility: Oil-Lubricated Engine Component
- Engine Family: ISB / B-Series Cummins
- Fitment Range: 1997.5–2018 5.9L and 6.7L ISB Engines
- Primary Use: Engine Rebuild and Camshaft Service
- Replacement Part Number: 4983253
- Shipping Weight: Approximately 0.20 lbs
Cross Reference Numbers
3940059, 4983253, K3940059, HE3940059, M3940059, M-3940059, FP3940059, FP-3940059, 151528, 151528HP, WA902-17-6612
FAQ
What is the purpose of the Cummins 3940059 thick camshaft bushing?
The 3940059 supports the camshaft within the engine block while maintaining proper lubrication and alignment. The thick-wall design provides additional support and durability in specific ISB engine applications.
How do I know if my engine requires the thick bushing?
Fitment depends on engine serial number, block machining specifications, and application requirements. Always verify using your Cummins ESN before ordering.
Can this bushing be used with aftermarket performance camshafts?
Yes. The OEM thick camshaft bushing is commonly used in stock and mild performance applications, provided proper clearances are verified during installation.
Does installation require machining?
Yes. Camshaft bushings should be professionally installed and line-bored or sized according to Cummins specifications to ensure proper oiling and camshaft alignment.
Is this a genuine Cummins part?
Yes. The 3940059 is a genuine OEM Cummins camshaft bushing designed to meet original equipment specifications for fit, performance, and durability.
