Product Description
Interstate-McBee M-3934047 Piston Pin – 2004.5–2007 5.9L Cummins (Aftermarket Replacement)
Precision wrist pin (gudgeon pin) for the 2004.5–2007 5.9L Cummins ISB 24-valve (common-rail). Manufactured to OE-equivalent tolerances for reliable piston/rod articulation and long service life. Sold individually.
- Direct replacement: Matches OE form, fit, and function for ISB 5.9 common-rail engines.
- Durable construction: Hardened steel pin designed to handle stock and work-truck duty cycles.
- Service ready: Ideal for in-chassis refreshes and full engine overhauls.
- Value: Interstate-McBee quality at a cost-effective price point.
What’s Included
- (1) Piston pin, P/N M-3934047
Vehicle/Engine Fitment
Always verify by Engine Serial Number (ESN) when possible.
- Dodge Ram 2500/3500 with 5.9L Cummins ISB (24-valve, common-rail)
- Model Years: 2004.5–2007 (commonly referred to as 2004.5, 2005, 2006, 2007 5.9L CR)
Recommended/Related Parts
- Pistons & ring sets (match to compression ratio and oversize if applicable)
- Piston pin bushings (connecting rod small-end)
- Full gasket set or upper set for in-chassis service
- Engine assembly lube
Install Notes
- Confirm pin fit with the piston and rod; check interference/clearance per the Cummins service manual.
- Use clean engine oil or assembly lube during installation.
- Service one cylinder at a time; keep components matched to their original bores unless performing a full overhaul.
- Observe orientation marks on pistons/rods; verify circlip/retainer seating where applicable.
Why Buy From CPP Diesel
- Diesel specialists with ESN-verified fitment support
- Fast shipping and easy returns
- Wide inventory of Cummins ISB components to finish the job
FAQ
Is this pin for common-rail 5.9L engines only?
Yes. This listing targets the 2004.5–2007 common-rail 5.9L Cummins. Verify by ESN to be sure.
How many do I need?
Six pins per engine—one per piston. Pins are sold individually.
Does this include pistons or clips?
No. This is the piston pin only. Order pistons, clips/retainers, and bushings separately.
Specifications for Interstate-McBee M-3931623
| Brand | Interstate-McBee |
| Part Number | M-3931623 |
| UPC | Not specified by manufacturer/seller |
| GTIN | Not specified by manufacturer/seller |
| Shipping Info | Package weight: ~0.21 lb (0.10 kg). Typical shipping dimensions: approx. 2.35" x 1.10" x 1.10". Storefront dimensions may also be listed as 2.00" x 2.00" x 3.00"; shipping method is calculated at checkout. |
| Cross Reference | OEM reference: Cummins 3931623. Supersedes / also replaces: 3281508, 3925031, 3907240, 3901787. Used across select Cummins B-Series/ISB and related applications (verify by ESN). |
| E-Codes | Not specified |
| Prop 65 | WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information: https://www.P65Warnings.ca.gov |
