Product Description
Cummins 3903744 — Turbocharger Oil Drain Elbow (Lower, Press-Fit Into Block)
MPN: 3903744 | Also Known As: turbo oil drain elbow, lower drain tube | Position: Lower elbow that presses into engine block
Why This Part
- ✓ OE replacement elbow that returns turbo oil to the crankcase.
- ✓ Direct-fit for 1994–2002 5.9L Cummins B-series (12V & 24V).
- ✓ Press-fit block interface for leak-free operation.
- ✓ Prevents oil seepage and smoke caused by damaged/corroded elbows.
Quick Specs
| Type | Turbocharger oil drain elbow (lower, block press-fit) |
|---|---|
| OE Part # | 3903744 |
| Qty Required | 1 per engine (sold individually) |
| Pairs With | Upper drain tube 3918585, drain hose 3286499, hose clamp 3937613, gasket 5264569 |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1994–2002 | 5.9L Cummins B-Series (12V 1994–1998; 24V 1998.5–2002) | Ram 2500/3500 |
Notes: Some catalogs list 1989–2002 coverage; most automotive listings specify 1994–2002. Always verify by VIN/ESN.
Often Paired With
- Upper Turbo Drain Tube: Cummins 3918585 (’94–’02)
- Drain Hose: Cummins 3286499 (’94–’04)
- Hose Clamp: Cummins 3937613 (’94–’02)
- Gasket: Cummins 5264569 (’89–’02)
What’s In The Box
- (1) Genuine Cummins Turbo Oil Drain Elbow (3903744)
- Related hose/tube/clamp/gasket sold separately (see “Often Paired With”).
Install Tips
- Withdraw old elbow; clean/inspect block bore. Lightly oil the new elbow and press straight into the bore—orient nipple toward drain hose.
- Replace hose/clamp; route without kinks. Verify turbo oil return path is clear.
- Warm engine and check for leaks after installation.
FAQ
WILL THIS FIT MY 1994–2002 5.9L CUMMINS RAM?Yes—this is the lower press-fit elbow used on 1994–2002 5.9L Cummins applications (both 12V and 24V). Confirm by VIN/ESN.
IS THIS THE ELBOW THAT PRESSES INTO THE BLOCK?Correct—3903744 is the lower elbow that presses into the block above the oil pan to return oil from the turbo.
DO I ALSO NEED THE UPPER TUBE OR HOSE?Often yes. The common complements are upper tube 3918585, drain hose 3286499, clamp 3937613, and gasket 5264569.
WILL THIS FIT 1989–1993 TRUCKS?Some catalogs show 1989–2002 coverage, but most automotive listings specify 1994–2002. Verify by ESN if you have an early truck.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3903744, built to factory specs for proper sealing and durability.
