Product Description
The CUMMINS 3942966 OEM FUEL RETURN LINE (CYLINDER HEAD TO TEE) is designed for 1998.5–2002 Dodge Ram trucks equipped with the 5.9L 24-valve Cummins diesel engine. This genuine Cummins fuel return line transfers excess fuel from the cylinder head return circuit to the fuel return tee while maintaining proper fuel system operation and OEM fitment.
Use this part when repairing damaged, corroded, leaking, or worn fuel return plumbing on VP44-equipped Cummins engines. Always verify fitment by part number and application before ordering.
FEATURES
- Genuine Cummins OEM fuel return line
- Direct-fit replacement for factory fuel return plumbing
- Connects cylinder head fuel return circuit to return tee fitting
- Helps maintain proper fuel return flow and system operation
- Built to Cummins OEM specifications for fit and durability
- Ideal for fuel system repairs and restoration projects
FITMENT
- 1998.5–2002 Dodge Ram 2500 5.9L Cummins 24-Valve
- 1998.5–2002 Dodge Ram 3500 5.9L Cummins 24-Valve
- VP44 injection pump-equipped applications
WHAT'S INCLUDED
- 1 Cummins 3942966 OEM Fuel Return Line (Cylinder Head to Tee)
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3942966
- VP44 Fuel System Components
- Cummins Fuel Return Fittings and Banjo Bolts
- Cummins Fuel Supply and Return Line Assemblies
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3942966
- Part Type: Fuel Return Line
- Line Location: Cylinder Head to Return Tee
- Engine Compatibility: 5.9L Cummins 24-Valve
- Fuel System Type: VP44
- Fitment Years: 1998.5–2002
- Vehicle Application: Dodge Ram 2500 / 3500
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
FAQ
Will this part fit my truck?
This fuel return line fits many 1998.5–2002 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L 24-valve Cummins engine. Always verify fitment using your part number and application before ordering.
Is this a genuine Cummins fuel line?
Yes. Cummins 3942966 is a genuine OEM Cummins fuel return line manufactured to factory specifications.
What does this fuel return line do?
This line routes excess fuel from the cylinder head return circuit to the fuel return tee, helping maintain proper fuel circulation and return flow.
What are the signs of a failed fuel return line?
Common symptoms include fuel leaks, fuel odor, corrosion, damaged tubing, or visible wear around fittings and connection points.
Does this fit VP44-equipped trucks?
Yes. This line is used on many 1998.5–2002 5.9L Cummins applications equipped with the Bosch VP44 injection pump.
Do I need any related parts?
Inspect banjo bolts, sealing washers, return fittings, fuel hoses, and related fuel system components during installation and replace worn parts as necessary.
