Product Description
Cummins 3973071 — Engine Oil Pan Drain Plug (M18 x 1.5)
MPN: 3973071 | Also Known As: threaded plug, oil drain plug | Cross-Ref: 3946645
Why This Part
- ✓ OE threaded plug that seals the oil pan drain opening.
- ✓ Direct-fit for Ram 5.9L (’03–’07) and 6.7L (’07.5–’24) ISB applications.
- ✓ Integrated seal interface to help prevent leaks.
- ✓ Built to Cummins specifications for durability.
Quick Specs
| Type | Engine oil pan drain plug (threaded) |
|---|---|
| Thread | M18 x 1.5 |
| Drive | ~10 mm internal square |
| Torque | ~60 Nm (44 ft-lb) |
| OE Part # | 3973071 (cross-ref 3946645) |
| Qty Required | 1 per engine (sold individually) |
Specs based on common OE data for 3973071; always follow your service manual for final torque/procedures.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2007.5–2024 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Notes: 3973071 is an OE Cummins threaded plug used across many ISB/QSB engines. Always confirm by VIN/ESN and thread spec (M18 x 1.5) before ordering.
Often Paired With
- Fresh oil & filter after service
- Replacement sealing washer or plug with integrated seal as applicable
- Shop towels/brake clean to clean mating surface
What’s In The Box
- (1) Genuine Cummins Engine Oil Pan Drain Plug (3973071)
Install Tips
- Verify thread (M18 x 1.5) and sealing surface style before install.
- Lightly oil seal; tighten to factory torque; check for weeping after warm-up.
- Replace any separate crush washer/seal if your setup uses one.
FAQ
WILL THIS FIT MY 2003–2007 5.9L CUMMINS RAM?Yes—3973071 is commonly used on 2003–2007 5.9L ISB oil pans (verify by VIN/ESN and thread spec).
WILL THIS FIT MY 2007.5–2024 6.7L CUMMINS RAM?Yes—this plug is widely used on 2007.5–2024 6.7L ISB applications (confirm by VIN/ESN).
WHAT SIZE IS THE THREAD?M18 x 1.5 is the typical OE thread for 3973071.
WHAT IS THE TORQUE SPEC?Approx. 60 Nm (44 ft-lb) is commonly referenced. Always defer to your service manual for final torque.
IS THERE A SEAL INCLUDED?Some versions use an integrated rubber seal; others use a separate crush washer. Inspect your OE configuration and replace the seal if needed.
