Product Description
CUMMINS 3973071 OEM ENGINE OIL PAN DRAIN PLUG – RAM 5.9L/6.7L (2003–2024)
Keep your Ram Cummins leak-free with the genuine CUMMINS 3973071 OEM engine oil pan drain plug, the M18 x 1.5 threaded plug designed by Cummins to seal the oil pan on late-model 5.9L and 6.7L ISB engines. This OE plug includes the proper sealing surface and length to maintain oil level, prevent drips, and withstand repeated oil changes on hard-working tow rigs and daily drivers alike.
Why Choose Genuine Cummins 3973071?
- Genuine Cummins OEM threaded plug – engineered specifically for B-series oil pan drain locations, not a generic hardware-store bolt.
- M18 x 1.5 thread with correct length and seat profile for proper clamping force and seal engagement.
- Integrated sealing surface designed to work with OEM-style washer/seal to stop annoying driveway drips.
- Durable steel construction built to handle repeated service intervals and harsh temperature cycles.
- OE-quality fitment for Ram 5.9L/6.7L ISB applications and other B-series Cummins engines where 3973071 is the specified drain plug.
Fitment
This Cummins 3973071 oil pan drain plug is commonly used as the OEM drain plug on B-series Cummins engines with an M18 x 1.5 oil pan drain port. It is a direct replacement for the factory plug on many Ram truck applications, including:
- 2003–2007 Dodge Ram 2500/3500 5.9L ISB Cummins (oil pan using M18 x 1.5 drain plug)
- 2007.5–2024 Ram 2500/3500 6.7L Cummins (select applications using the M18 x 1.5 threaded drain)
- Various Cummins B-series industrial/medium-duty engines (4B3.9, B6.7, ISB5.9, ISC8.3, ISL/ISL9, QSB/QSC/QSL) where 3973071 is listed as the oil pan drain plug – verify by ESN.
Always confirm fitment by engine serial number (ESN) or existing part number stamped on the original plug before ordering.
Installation & Torque
- Clean the oil pan sealing surface and inspect for damage or burrs.
- Install the plug with a clean, undamaged seal or washer as required.
- Tighten to approximately 44 ft-lb (60 N·m) unless otherwise specified by your Cummins service manual.
- Check for leaks after your first heat cycle and retorque if necessary.
Cross-Reference Cummins Components (CPP Diesel Internal Links)
Pair this drain plug with other genuine Cummins parts from CPP Diesel for a complete oil system refresh:
- CUMMINS 3949769 OEM ENGINE OIL PAN – 5.9L CUMMINS (2003–2007)
- CUMMINS 3920706 OEM EXPANSION PLUG – TURBO DRAIN (5.9L/6.7L)
- CUMMINS 3923096 OEM SEALING WASHER – OIL PAN DRAIN PLUG (5.9L) for earlier 5.9L applications.
Specifications for cummins 3973071
| Specification | Detail |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 3973071 |
| UPC | 0832313050676 |
| GTIN | 0832313050676 |
| Engine Compatibility | B-series Cummins applications using an M18 x 1.5 oil pan drain, including many 2003–2024 Ram 5.9L/6.7L ISB engines (verify by ESN). |
| Thread Size | M18 x 1.5 |
| Material | Steel with sealing surface for washer/seal |
| Includes | One threaded drain plug (seal style may vary; use with appropriate Cummins washer/seal as required). |
| Recommended Torque | Approx. 44 ft-lb (60 N·m) |
| Shipping Weight | Approx. 0.1 lb (0.05 kg) |
| Package Dimensions | Approx. 1 in x 1 in x 1 in |
| Shipping Method | Standard ground parcel |
| Cross Reference (ID Only) | Cummins 3946645; various OE truck references where applicable (verify ESN before ordering). |
| E-Codes / Emissions | Not applicable |
| Prop 65 Warning | This product can expose you to chemicals including metal compounds known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov. |
FAQ
WILL THIS CUMMINS 3973071 DRAIN PLUG FIT MY 2003–2024 RAM 5.9L OR 6.7L?
In most cases, yes—if your oil pan uses an M18 x 1.5 threaded drain port and calls out Cummins 3973071 as the drain plug, this is the correct OEM part. We always recommend confirming by engine serial number (ESN) or checking the part number on your existing plug.
WHAT SIZE IS THE THREAD ON THE 3973071 OIL PAN DRAIN PLUG?
The Cummins 3973071 drain plug uses an M18 x 1.5 thread with an OE-correct length and seat profile to seal properly in the factory oil pan.
DOES THIS PLUG COME WITH A SEAL OR GASKET?
The plug is designed to be used with the proper Cummins sealing washer or integrated seal. Depending on packaging, the plug may arrive with an attached seal. If you are unsure of the condition or style of your current washer, we recommend replacing it with a new Cummins sealing washer such as part number 3923096 where applicable.
WHAT TORQUE SHOULD I USE WHEN INSTALLING THIS DRAIN PLUG?
Typical torque for this style plug is around 44 ft-lb (60 N·m). Always follow the torque specification listed in your Cummins or Ram service manual for your exact engine and oil pan combination to avoid stripping threads or under-tightening the plug.
WHAT OTHER PARTS SHOULD I REPLACE WHILE SERVICING THE OIL PAN?
When servicing the oil pan, many owners also inspect or replace the oil pan itself (such as the CUMMINS 3949769 OEM oil pan on 2003–2007 5.9L trucks), the sealing washer, and related plugs like the CUMMINS 3920706 turbo drain expansion plug. Replacing these components together helps eliminate leaks and keeps your Cummins oil system in top shape.
