CUMMINS
CUMMINS 3923171 OEM FUEL INJECTION PUMP RETURN LINE (FUEL DRAIN TUBE) – RAM 5.9L 12-VALVE (1994–1998)
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- SKU:
- CUM3923171
- MPN:
- 3923171
- Shipping:
- Calculated at Checkout
Description
Genuine Cummins
Cummins 3923171 — Fuel Injection Pump Return Line / Fuel Drain Tube
MPN: 3923171 | Also Known As: fuel drain tube, injection pump return line | Location: P7100 pump return to rubber return hose
Why This Part
- ✓ OE-formed steel line for a leak-free return path from the P7100 injection pump.
- ✓ Direct-fit for 1994–1998 5.9L 12-valve Cummins (Ram 2500/3500).
- ✓ Restores proper fuel return & idle quality after line damage or corrosion.
- ✓ Genuine Cummins quality and geometry.
OE Fit Stock Replacement P7100 12V
Quick Specs
| Type | Fuel injection pump return line (fuel drain tube) |
|---|---|
| OE Part # | 3923171 |
| Qty Required | 1 per engine (sold individually) |
| Pump | P7100 (12-valve, 1994–1998) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1994–1998 | 5.9L Cummins 12-Valve (P7100) | Ram 2500/3500 |
Industrial/Off-Highway: Used on B-Series 5.9L applications (Tier 1 era). Always verify by ESN.
Often Paired With
- Rubber fuel return hose & clamps: replace if aged or swollen
- Banjo sealing washers: renew if fittings are disturbed
- P7100 related lines: oil feed line (if servicing pump), overflow valve, & return manifold checks
What’s In The Box
- (1) Genuine Cummins Fuel Injection Pump Return Line / Fuel Drain Tube (3923171)
- Hose, clamps, and washers sold separately.
Install Tips
- Route per factory path; avoid kinks and chafe points.
- Use fresh clamps and verify leak-free connections after warm-up.
- If rust/debris is present, inspect return hose and tank pickup for contamination.
FAQ
WILL THIS FIT MY 1994–1998 12-VALVE CUMMINS?Yes—this OE line fits P7100-equipped 5.9L 12-valve Ram 2500/3500 models (verify by VIN/ESN).
WHAT DOES THIS LINE CONNECT?It carries return fuel from the P7100 injection pump to the rubber return hose/manifold.
IS THIS A GENUINE CUMMINS PART?Yes—original Cummins 3923171 with factory bends and fittings.
DO I NEED NEW HOSE OR WASHERS?Recommended. Replace the short rubber return hose, clamps, and any sealing washers to prevent leaks.
DOES THIS FIT 1998.5–2002 24-VALVE TRUCKS?No—those VP44 engines use different return plumbing. This part targets 1994–1998 12-valve P7100 trucks.
Additional Information
Vehicle Year: |
1994,1995,1996,1997,1998 |
Vehicle Make: |
Dodge |
ENGINE: |
5.9L |
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