Product Description
Cummins 3919687 — HX35 Turbocharger Oil Inlet Fitting (Female Connector, M12×1.5)
MPN: 3919687 | Also Known As: turbo oil feed inlet fitting, female connector | Thread: M12 × 1.5 (turbo center section)
Why This Part
- ✓ OE female connector for the turbo’s oil feed inlet on HX35 applications.
- ✓ Direct-fit for 2nd-Gen Ram Cummins years listed below.
- ✓ Restores leak-free oil supply to the turbo with correct geometry.
- ✓ Durable OE construction built to Cummins specs.
Quick Specs
| Type | Turbocharger oil inlet fitting (female connector) |
|---|---|
| OE Part # | 3919687 |
| Thread (turbo side) | M12 × 1.5 |
| Qty Required | 1 per turbo (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine / Turbo | Chassis |
|---|---|---|
| 1991.5–1998 | 5.9L Cummins 12V with HX35/HX35W | Ram 2500/3500 |
| 1998.5–2002 | 5.9L Cummins 24V (VP44) with HY35/HX35 | Ram 2500/3500 |
Notes: Thread spec is M12×1.5 at the turbo CHRA. Some HE341/HE351 setups can use this inlet with the appropriate feed line/adaptor—verify your turbo and line type before ordering.
Often Paired With
- Turbo Oil Feed Line (’91.5–’98): Cummins 3912747
- Sealing Washer: Cummins 3924389 (copper) · Fitting Seal: Cummins 3037236
What’s In The Box
- (1) Genuine Cummins Turbo Oil Inlet Fitting / Female Connector (3919687)
- (1) O-ring (OE package)
Install Tips
- Inspect and clean the turbo oil inlet; replace the sealing washer/line seals as needed.
- Lightly oil the O-ring, torque to spec, and verify no leaks on warm-up.
- If mixing components (e.g., HE341/HE351 with older feed line), confirm thread compatibility before assembly.
FAQ
WILL THIS FIT MY 1991.5–2002 5.9L CUMMINS?Yes—this is the OE HX35/HY35 oil inlet fitting used on 12V (’91.5–’98) and many 24V (’98.5–’02) applications. Always verify your turbo and feed line type.
WHAT IS THE THREAD SIZE ON THE TURBO SIDE?M12 × 1.5 at the turbo center section (CHRA).
DOES IT INCLUDE THE O-RING?Yes—OE Cummins packaging includes the O-ring. Replace any copper washers or line seals during install.
CAN I USE THIS WITH HE341/HE351 TURBOS?It can be used on some HE341/HE351 setups when pairing with the correct feed line/adaptor. Verify before ordering.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3919687 for proper fit and sealing.
