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SKU:
NLT1Q01644
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Injector Fuel Return Line for 1994–1998 Ram 5.9L 12V Cummins P7100 – 3926103
$76.99
In Stock
$76.99
Sale price
$76.99
Regular price
New aftermarket six-injector overflow/fuel-return line assembly for compatible 1994–1998 Dodge Ram 2500/3500 trucks with the 5.9L 12-valve Cummins and Bosch P7100 pump; replaces 3926103.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- 1994–1998 Dodge Ram 2500 5.9L 12V Cummins with P7100
- 1994–1998 Dodge Ram 3500 5.9L 12V Cummins with P7100
Product Overview
Diesel odor, wetness around the injectors, air entering the fuel system, or fuel collecting along the head can come from a cracked return manifold or failed sealing washers. This line routes injector leak-off fuel back through the return system on the P-pump 12-valve engine.
It is a low-pressure return assembly, not a high-pressure injector line. Clean the area and confirm exactly where the leak begins.
Key Features & Performance
- Six-injector leak-off/overflow manifold
- For Bosch P7100 12-valve Cummins systems
- Restores the low-pressure fuel-return path
- Cross-reference 3926103
Replaces Part Numbers
- 3926103
Common Uses
- Repairing fuel seepage at the injector return circuit
- Replacing a cracked or corroded leak-off line
- Stopping air entry after seals and fittings are confirmed
Technical Specifications
- Product Type: Injector overflow/fuel-return line
- Engine: 5.9L 12-valve Cummins
- Injection Pump: Bosch P7100
- Condition: New
- Replacement Type: Aftermarket
Installation & Fitment
- Clean around all injectors before opening the system
- Use the correct new sealing washers and fittings
- Align the manifold without bending or side load
- Prime the fuel system and inspect for leakage at idle
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
This is for P7100-equipped 12-valve engines, not VP44 24-valve or common-rail systems. Match 3926103 and the return-fitting layout.
Frequently Asked Questions
Q: Is this a high-pressure injector line? A: No. It is the low-pressure injector return/overflow assembly.
Q: Does it fit a 2001 24-valve Cummins? A: No. That engine uses a different fuel system.
Q: Can leaking return seals cause hard starting? A: They can contribute to air entry, but the full fuel system should be tested.
Q: Should old sealing washers be reused? A: No. Use the correct new seals during installation.
Part Summary
keywords: 3926103 Cummins return line, P7100 injector overflow manifold, 1994 1998 Ram diesel leak, 12 valve Cummins fuel return, Ram 2500 injector leak off line
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.