Product Description
Interstate-McBee M-3902332 Camshaft Woodruff Key – 1989–2018 Cummins 5.9L/6.7L
The Interstate-McBee M-3902332 woodruff (camshaft) key restores precise gear indexing on Cummins 5.9L & 6.7L B-Series/ISB engines. Built to OEM-style dimensions for reliable timing alignment and long-term durability—ideal for cam swaps, timing service, or rebuilds.
- Direct replacement: OEM-style fit for Cummins 3902332.
- Accurate timing: Locks the cam gear to prevent slip and maintain proper valve timing.
- Aftermarket value: Interstate-McBee quality at a budget-friendly price point.
- Drop-in install: No modifications required when used with the correct cam/gear.
Specifications
| Interstate-McBee P/N | M-3902332 |
|---|---|
| OEM Reference | Cummins 3902332 |
| Key Type | Plain woodruff key (camshaft) |
| Nominal Size | 4.0 mm woodruff (per application listings) |
| Engine Families | Cummins B / ISB / 5.9L & 6.7L |
| Vehicle Years | 1989–2018 Dodge Ram 2500/3500 (5.9L/6.7L) |
Vehicle Fitment
Always confirm by ESN (engine serial number) for exact compatibility.
- Dodge Ram 2500/3500 – Cummins 5.9L (12V & 24V) – 1989–2007
- Dodge/Ram 2500/3500 – Cummins 6.7L – 2007–2018
- Additional applications: Common on Cummins industrial B-series (e.g., 4BT/6BT) where specified by ESN.
Installation Notes
- Inspect camshaft slot and gear for wear; replace any damaged components.
- Seat the key fully; align timing marks and torque fasteners per the Cummins service manual.
- Use new seals/gaskets as required when servicing the front cover and gear train.
Cross-Reference
OEM Cummins 3902332. Also referenced in distributor catalogs alongside 4928969.
Why Buy From CPP Diesel
- Real diesel techs for ESN-verified fitment support.
- Fast shipping and easy returns.
- Deep Cummins B-series catalog for one-cart timing service: cam gears, seals, front covers, hardware.
FAQ
Will this key fit both 5.9L (12V/24V) and 6.7L Cummins?Yes—M-3902332 matches OEM 3902332 commonly used across 1989–2018 5.9L and 6.7L applications. Confirm via ESN for edge cases or mixed-year builds.
Is this the correct thickness?
Retail listings identify this part as a 4.0 mm woodruff key for B-series/ISB camshaft fitment. Always verify dimensions during assembly.
When should I replace the cam key?
Replace any time the key shows rounding/peening, when swapping cams/gears, or if timing slip is suspected.
Does this also fit 4BT/industrial engines?
Frequently used on 3.9L/5.9L industrial B-series; verify by ESN and build spec before ordering.
Product Videos
Custom Field
YEAR 1989-2018
MAKE DODGE
ENGINE 5.9L,6.7L
