Product Description
Interstate-McBee M-3920691 Piston Wrist Pin Retaining Ring – 94–07 5.9L Cummins (Sold Individually)
OEM-style wrist pin retaining ring (circlip) engineered by Interstate-McBee for 1994–2007 5.9L Cummins B-Series applications. Direct-fit aftermarket replacement for Cummins 3920691. Built for reliable pin retention and long service life during high-load diesel use.
- Direct replacement: Matches OEM form/fit/function for fast, hassle-free installs.
- Durable spring steel: Maintains tension to keep the wrist pin securely in place.
- Sold individually: 2 clips per piston; 12 clips required for a complete 6-cyl engine.
- Aftermarket value: Interstate-McBee quality at a fraction of OEM pricing.
Specifications
| Interstate-McBee P/N | M-3920691 |
|---|---|
| OEM Cross-Reference | Cummins 3920691 (also referenced: 3901706) |
| Component | Piston wrist pin retaining ring (circlip) |
| Material | Heat-treated spring steel |
| Qty Needed | 2 per piston (order 12 for full engine) |
| Package Contents | (1) retaining ring |
Vehicle Fitment
Always verify by Engine Serial Number (ESN) for exact configuration.
- Dodge Ram 2500/3500 – 5.9L Cummins
- 1994–1998 12-Valve 6BT (P7100)
- 1998.5–2002 24-Valve ISB (VP44)
- 2003–2007 24-Valve ISB (Common Rail)
- Note: Also commonly used on earlier 1989–1993 5.9L 12V applications; verify by ESN.
Installation Tips
- Use new clips during piston/wrist pin service; do not reuse old clips.
- Confirm the clip is fully seated in the groove—audible “snap” and visual inspection.
- Protective eyewear recommended; clips are spring-loaded.
- Follow the Cummins service manual for piston/pin orientation and clearances.
Warranty
Interstate-McBee new engine parts include manufacturer warranty coverage. Contact us for coverage details for this category.
Cross-References & Related Parts
- OEM: Cummins 3920691 (alt ref 3901706)
- Related: Wrist Pin Cummins 3934048 (1994–2002), 3934047 (2004.5–2007); Interstate-McBee Wrist Pin Bushing M-4891178.
Why Buy From CPP Diesel
- Expert ESN-verified fitment for B-Series Cummins.
- Fast shipping & easy returns.
- Diesel pros on call for build planning and parts bundling.
FAQ
How many clips do I need for a full engine?Two per piston—12 total for a 6-cylinder 5.9L Cummins.
Is this clip interchangeable with Cummins 3920691?
Yes. M-3920691 is the Interstate-McBee aftermarket equivalent to OEM Cummins 3920691.
Will it fit all 1994–2007 5.9L engines?
Yes—fits 12V (’94–’98) and 24V ISB (’98.5–’07). For edge cases or mixed builds, confirm by ESN.
Can I reuse old retaining rings?
No. Always install new clips to ensure proper retention and avoid engine damage.
Product Videos
Custom Field
YEAR 1994-2007
MAKE DODGE
ENGINE 5.9L
