Product Description
CUMMINS 3903857 OEM VIBRATION DAMPER AND FLYWHEEL MOUNTING BOLT FOR 1989-2002 5.9L CUMMINS
The genuine Cummins 3903857 OEM mounting bolt is designed for vibration damper and flywheel mounting applications on 1989-2002 5.9L Cummins 6BT and ISB diesel engines.
This factory-correct fastener helps maintain proper clamp load, torque retention, and rotating assembly reliability in high-vibration diesel applications.
Replacing worn, stretched, or damaged mounting hardware during engine service helps reduce vibration-related failures and supports long-term engine durability.
Manufactured to OEM Cummins specifications, this bolt is engineered specifically for diesel engine vibration loads, heat cycles, and high-torque operation.
FEATURES
- Genuine OEM Cummins mounting bolt
- Designed for vibration damper and flywheel applications
- Fits 1989-2002 5.9L Cummins 6BT and ISB engines
- Helps maintain proper clamp load and torque retention
- Direct OEM replacement design
- Designed for diesel vibration and high-load operation
- Ideal for rebuilds, repairs, and preventative maintenance
FITMENT
- 1989-1993 Dodge Ram D/W250 5.9L Cummins 6BT
- 1989-1993 Dodge Ram D/W350 5.9L Cummins 6BT
- 1994-1998 Dodge Ram 2500 5.9L Cummins 6BT
- 1994-1998 Dodge Ram 3500 5.9L Cummins 6BT
- 1998.5-2002 Dodge Ram 2500 5.9L Cummins ISB
- 1998.5-2002 Dodge Ram 3500 5.9L Cummins ISB
Fitment Note: Verify application and mounting location before ordering.
WHAT'S INCLUDED
- 1 Cummins 3903857 OEM mounting bolt
RELATED PARTS
- Cummins vibration dampers
- Fluidampr performance dampers
- ARP harmonic damper hardware kits
- Cummins engine fasteners and hardware
- Flywheel mounting hardware
WHY REPLACE DAMPER AND FLYWHEEL HARDWARE?
Critical rotating assembly hardware experiences constant stress from engine vibration, torque transfer, and heat cycling. Replacing mounting bolts during service helps maintain proper component retention and long-term engine reliability.
SPECIFICATIONS
- Brand: Cummins
- Part Number: 3903857
- Product Type: Vibration damper and flywheel mounting bolt
- Engine Compatibility: 5.9L Cummins 6BT and ISB
- Fitment Years: 1989-2002
- Application: Vibration damper and flywheel mounting
- Configuration: OEM mounting fastener
- Application Type: Engine rebuild and vibration damper service
- Condition: New genuine Cummins OEM part
INSTALLATION NOTES
- Follow Cummins torque specifications during installation
- Inspect mounting surfaces before installation
- Replace damaged or stretched hardware
- Use the proper tightening sequence where applicable
- Verify proper vibration damper and flywheel alignment
FAQ
What is Cummins 3903857 used for?
This OEM mounting bolt is used in vibration damper and flywheel mounting applications on 5.9L Cummins engines.
Will this fit both 12-valve and 24-valve 5.9L Cummins engines?
Yes. Cummins 3903857 fits many 1989-2002 5.9L Cummins 6BT and ISB engines including both 12-valve and early 24-valve applications.
Should mounting bolts be replaced during flywheel or damper service?
Yes. Replacing critical rotating assembly hardware during service helps maintain proper torque retention and long-term reliability.
Is this a genuine Cummins OEM fastener?
Yes. Cummins 3903857 is a genuine OEM Cummins mounting bolt engineered to factory specifications.
Can worn mounting bolts cause vibration issues?
Yes. Damaged or stretched mounting hardware may contribute to improper component retention and vibration-related failures.
