Product Description
The CUMMINS 3957203 OEM VALVE COVER BOLT WITH GROMMET is the genuine factory captive isolator cap screw used on 2004.5-2005 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L Cummins Common Rail diesel engine. This OEM fastener assembly includes the bonded rubber isolator and sealing grommet required to properly secure the valve cover while maintaining correct sealing pressure and vibration isolation.
Over time, factory valve cover isolators can harden, compress, or crack from heat cycles and oil exposure, leading to oil seepage and uneven valve cover clamping pressure. Replacing worn hardware with genuine Cummins fasteners helps restore factory sealing performance and prevent future leaks.
This direct-fit OEM Cummins assembly includes the correct bolt, washer, and bonded rubber isolator used from the factory for proper fitment and long-term durability.
FEATURES
- Genuine Cummins OEM valve cover bolt assembly
- Includes captive rubber isolator and sealing grommet
- Fits 2004.5-2005 5.9L Cummins Common Rail engines
- Helps prevent valve cover oil leaks
- Maintains proper valve cover clamping pressure
- Reduces vibration and valve cover movement
- Direct-fit OEM replacement design
- Ideal for maintenance, resealing, and engine rebuilds
FITMENT
- 2004.5 Dodge Ram 2500 5.9L Cummins Common Rail
- 2004.5 Dodge Ram 3500 5.9L Cummins Common Rail
- 2005 Dodge Ram 2500 5.9L Cummins Common Rail
- 2005 Dodge Ram 3500 5.9L Cummins Common Rail
Fitment Note: Designed specifically for mid-year 2004.5 through 2005 Common Rail 5.9L Cummins engines. Multiple bolts are required per valve cover.
WHAT'S INCLUDED
- 1 Cummins 3957203 valve cover bolt assembly
- Integrated bonded rubber isolator / grommet
- Factory-style washer assembly
CROSS-REFERENCE & RELATED PRODUCTS
- CUMMINS 3957912 OEM VALVE COVER GASKET
- CUMMINS 5264950 OEM CRANKCASE BREATHER FILTER
- CUMMINS 3969988 OEM INTAKE HEATER GRID GASKET
- ARP 247-7201 ROCKER PEDESTAL STUD KIT
- CUMMINS OEM ENGINE PARTS
WHY REPLACE VALVE COVER BOLT GROMMETS?
Valve cover leaks on high-mileage Cummins engines are often caused by hardened or flattened bolt isolators rather than the gasket itself. Replacing worn valve cover bolt assemblies helps maintain proper sealing pressure, reduce vibration, and restore factory leak protection.
SPECIFICATIONS
| Specification | Details |
|---|---|
| Manufacturer | Cummins |
| Part Number | 3957203 |
| Component Type | Valve cover bolt with bonded rubber isolator |
| Engine Compatibility | 5.9L Cummins Common Rail |
| Fitment Years | 2004.5-2005 |
| Application | Valve cover sealing and vibration isolation |
| UPC / GTIN-12 | 190910246050 |
| Quantity Required | Multiple per valve cover |
| Condition | New Genuine Cummins OEM Part |
| Prop 65 | Warning: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. |
FAQ
What does the Cummins 3957203 bolt assembly include?
The assembly includes the OEM valve cover bolt, bonded rubber isolator, sealing grommet, and washer assembly used to properly secure the valve cover.
Will this fit all 5.9L Cummins engines?
No. This bolt is specifically designed for 2004.5-2005 5.9L Common Rail Cummins applications.
Can worn bolt isolators cause oil leaks?
Yes. Hardened or compressed isolators can reduce sealing pressure and allow oil seepage around the valve cover.
Is this a genuine Cummins OEM part?
Yes. Cummins 3957203 is a genuine OEM captive isolator cap screw assembly designed to factory specifications.
