Product Description
The CUMMINS 3918999 OEM HARMONIC BALANCER VIBRATION DAMPER is designed for 1998.5–2002 5.9L ISB Cummins diesel engines. This genuine Cummins vibration damper helps control crankshaft harmonics and engine vibration while maintaining proper engine balance, reliability, and long-term durability.
Use this part when replacing a worn, damaged, cracked, or deteriorated harmonic balancer. Proper vibration control helps reduce stress on the crankshaft, front engine components, accessory drive systems, and internal rotating assemblies. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM harmonic balancer vibration damper
- Direct-fit replacement for 1998.5–2002 5.9L ISB Cummins engines
- Helps reduce crankshaft vibration and harmonic resonance
- Supports proper engine balance and smooth operation
- Designed for long service life and OEM performance
- Recommended during front engine service or rebuild work
FITMENT
- 1998.5–2002 Dodge Ram 2500 5.9L ISB Cummins
- 1998.5–2002 Dodge Ram 3500 5.9L ISB Cummins
- Select Cummins ISB commercial and industrial applications
WHAT'S INCLUDED
- 1 Cummins 3918999 OEM Harmonic Balancer Vibration Damper
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3918999
- Cummins Front Crankshaft Seal
- Cummins Serpentine Belt Components
- Cummins Timing Cover Service Parts
- Cummins Crankshaft Pulley Hardware
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3918999
- Part Type: Harmonic Balancer / Vibration Damper
- Engine Compatibility: 5.9L ISB Cummins
- Fitment Years: 1998.5–2002
- Vehicle Application: Dodge Ram 2500 / 3500
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
- Location: Front Crankshaft Assembly
FAQ
Will this harmonic balancer fit my truck?
This vibration damper is designed for 1998.5–2002 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L ISB Cummins engine. Always verify fitment by engine serial number before ordering.
What does a harmonic balancer do?
The harmonic balancer helps absorb crankshaft vibrations and torsional harmonics that occur during engine operation. This helps protect the crankshaft and related engine components.
What are signs of a failing harmonic balancer?
Common symptoms include engine vibration, wobbling at the crank pulley, unusual belt wear, front engine noise, or visible cracking and deterioration of the damper material.
Is this a genuine Cummins part?
Yes. Cummins 3918999 is a genuine OEM harmonic balancer vibration damper designed to meet factory specifications.
Should the front crankshaft seal be replaced during installation?
Many technicians recommend inspecting or replacing the front crankshaft seal while the harmonic balancer is removed to help prevent future oil leaks.
Do I need any related parts?
Inspect the front crankshaft seal, serpentine belt, tensioner, pulleys, and mounting hardware during installation and replace worn components as necessary.
