Product Description
The CUMMINS 4938189 OEM EXPANSION PLUG (FREEZE / CORE PLUG) is designed for 2003–2018 5.9L and 6.7L Cummins diesel engines. This genuine Cummins expansion plug is engineered to seal engine block coolant passages while maintaining proper cooling system integrity and long-term reliability.
Use this part when replacing corroded, leaking, or damaged freeze plugs during engine repair, coolant system service, or engine rebuild work. Always verify fitment by year, make, model, engine, and engine serial number before ordering.
FEATURES
- Genuine Cummins OEM expansion plug
- Also known as a freeze plug or core plug
- Designed for 2003–2018 5.9L and 6.7L Cummins applications
- Helps maintain proper engine coolant sealing
- Direct-fit replacement component
- Recommended during engine rebuilds and cooling system repairs
FITMENT
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins
- 2007.5–2018 Ram 2500/3500 6.7L Cummins
- Select Cummins ISB industrial and commercial applications
WHAT'S INCLUDED
- 1 Cummins 4938189 OEM Expansion Plug (Freeze / Core Plug)
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 4938189
- Engine coolant service components
- Engine block repair and rebuild components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 4938189
- Part Type: Expansion Plug / Freeze Plug / Core Plug
- Engine Compatibility: 5.9L Cummins, 6.7L Cummins
- Fitment Years: 2003–2018
- Vehicle Application: Dodge Ram / Ram 2500 and 3500
- Condition: New
- Quantity: Sold Individually
FAQ
Will this part fit my truck?
This part fits the applications listed above. Always verify your year, make, model, engine, and engine serial number before ordering.
Is this a direct replacement?
Yes. Cummins 4938189 is a direct-fit OEM replacement expansion plug for the listed applications.
What is included?
This listing includes one Cummins 4938189 OEM expansion plug.
What is an expansion plug?
An expansion plug, commonly called a freeze plug or core plug, seals coolant passages in the engine block and helps prevent coolant leaks.
When should a freeze plug be replaced?
Freeze plugs should be replaced if corrosion, leakage, rust damage, or physical deterioration is present.
Do I need any related parts?
Inspect nearby expansion plugs, coolant hoses, gaskets, seals, and cooling system components during service and replace worn parts as necessary.
