Product Description
Cummins 3918428 OEM Engine Oil Pressure Regulator Plunger – Ram 5.9L 12-Valve (1994–1998)
The Cummins 3918428 OEM Engine Oil Pressure Regulator Plunger is a genuine Cummins replacement component designed to help maintain proper engine oil pressure in 5.9L 12-valve Cummins diesel engines. Located within the oil pressure regulator assembly, this plunger works with the regulator spring to control oil pressure throughout the lubrication system, helping protect critical engine components from excessive wear.
Over time, worn, damaged, or sticking oil pressure regulator components can contribute to inconsistent oil pressure readings, pressure fluctuations, or reduced lubrication performance. Replacing the regulator plunger with a genuine Cummins OEM component helps restore proper oil pressure regulation and maintain long-term engine reliability.
Features
- Genuine Cummins OEM replacement part
- Direct replacement for the factory oil pressure regulator plunger
- Helps maintain proper engine oil pressure
- Manufactured to original Cummins specifications
- Supports proper lubrication system operation
- Precision-machined for accurate fit and performance
- Designed for long service life and durability
- Ideal for maintenance, repair, or engine rebuild projects
Fitment
- 1994 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1995 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1996 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1997 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1998 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1994 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1995 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1996 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1997 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1998 Dodge Ram 3500 5.9L Cummins 12-Valve
- Additional Cummins 5.9L B-Series applications requiring part number 3918428
Note: Always verify your engine serial number and existing component part number before ordering. Inspect the oil pressure regulator spring and housing for wear during installation.
What's Included
- Cummins 3918428 OEM Oil Pressure Regulator Plunger
Specifications
- Manufacturer: Cummins
- Part Number: 3918428
- Product Type: Engine Oil Pressure Regulator Plunger
- Material: OEM Hardened Steel Construction
- Application: Engine Oil Pressure Regulation System
- Engine Platform: Cummins 5.9L 12-Valve
- Fuel Type: Diesel
- Installation Location: Oil Pressure Regulator Assembly
- Replacement Type: Direct OEM Replacement
- Condition: New Genuine Cummins Part
Cross Reference Numbers
3918428
FAQ
What does the oil pressure regulator plunger do?
The oil pressure regulator plunger works with the regulator spring to control and stabilize engine oil pressure throughout the lubrication system.
What are the symptoms of a faulty oil pressure regulator plunger?
Common symptoms may include fluctuating oil pressure readings, abnormal oil pressure levels, inconsistent lubrication performance, or pressure-related engine concerns.
Is this a genuine Cummins part?
Yes. The 3918428 is a genuine Cummins OEM replacement component manufactured to original equipment specifications.
Should I replace the regulator spring at the same time?
During maintenance or engine rebuilds, it is often recommended to inspect the regulator spring and related components for wear and replace them if necessary.
Will this fit all 5.9L Cummins engines?
Not necessarily. Always verify fitment by engine serial number and part number before ordering.
Is this part commonly replaced during an engine rebuild?
Yes. Many engine builders replace oil pressure regulator components during overhauls to help ensure proper lubrication system performance and reliability.
