Product Description
The CUMMINS 3914035 OEM EXPANSION PLUG is a genuine Cummins replacement core plug designed for the side of the engine block on 1989-2002 Dodge Ram 5.9L Cummins diesel engines. This OEM expansion plug helps seal the engine block coolant passages and restore proper cooling system integrity during maintenance, rebuilds, or freeze plug replacement service.
Over time, factory expansion plugs can corrode, leak, or weaken due to coolant exposure, heat cycles, and age. Replacing worn or damaged freeze plugs with genuine Cummins OEM components helps maintain proper coolant sealing and long-term engine reliability.
The Cummins 3914035 expansion plug is manufactured to OEM specifications for precise fitment and dependable sealing performance in both 12-valve and 24-valve 5.9L Cummins applications.
FEATURES
- Genuine Cummins OEM expansion plug
- Fits side of engine block coolant passage locations
- Designed for 1989-2002 5.9L Cummins diesel engines
- Helps restore proper cooling system sealing
- OEM-quality fitment and corrosion resistance
- Ideal for rebuilds, maintenance, and freeze plug repair
- Direct replacement design
FITMENT
- 1989-1993 Dodge Ram D250/D350/W250/W350 5.9L Cummins 12V
- 1994-1998 Dodge Ram 2500/3500 5.9L Cummins 12V
- 1998.5-2002 Dodge Ram 2500/3500 5.9L Cummins 24V
Fitment Note: Fits side-of-block expansion plug locations on 5.9L Cummins engines. Verify size and location before ordering.
WHAT'S INCLUDED
- 1 Cummins 3914035 OEM expansion plug
CROSS-REFERENCE & RELATED PRODUCTS
- CUMMINS 3900955 OEM EXPANSION PLUG
- CUMMINS 3284623 OEM EXPANSION PLUG
- CUMMINS 5298285 OEM THERMOSTAT
- FLEETGUARD CC36071 OAT ANTIFREEZE COOLANT
- CUMMINS OEM ENGINE PARTS
WHY REPLACE EXPANSION PLUGS?
Expansion plugs, commonly called freeze plugs or core plugs, can corrode internally over time from coolant exposure and heat cycling. Replacing aging or leaking plugs helps prevent coolant leaks, overheating, and potential engine damage while restoring cooling system reliability.
SPECIFICATIONS
| Specification | Details |
|---|---|
| Manufacturer | Cummins |
| Part Number | 3914035 |
| Product Type | Expansion Plug / Freeze Plug |
| Location | Side of engine block |
| Engine Compatibility | 5.9L Cummins 12V / 24V |
| Fitment Years | 1989-2002 |
| Configuration | OEM press-fit expansion plug |
| Condition | New Genuine Cummins OEM Part |
| Prop 65 | Warning: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. |
FAQ
What does the Cummins 3914035 expansion plug do?
This expansion plug seals coolant passages in the side of the engine block to help maintain proper cooling system pressure and prevent coolant leaks.
Will this fit both 12-valve and 24-valve 5.9L Cummins engines?
Yes. Cummins 3914035 fits 1989-2002 5.9L Cummins 12V and 24V diesel engine applications.
Is this a genuine Cummins OEM freeze plug?
Yes. This is a genuine Cummins OEM expansion plug manufactured to factory specifications for fitment and sealing performance.
When should freeze plugs be replaced?
Freeze plugs should be replaced if corrosion, coolant leakage, pitting, or visible damage is present, especially during engine rebuilds or cooling system service.
