Product Description
Genuine Cummins
Cummins 3902332 — Camshaft Key (Plain Woodruff)
MPN: 3902332 | Also Known As: woodruff key, cam key, camshaft woodruff | Use Case: Locates/locks cam gear to camshaft to prevent slip
Why This Part
- ✓ Genuine Cummins woodruff key for precise cam timing retention.
- ✓ Direct-fit for Ram 5.9L & 6.7L Cummins applications (see fitment).
- ✓ Hardened OE material for long service life.
- ✓ Ideal during camshaft/gear service or timing repairs.
OE Fit Timing Component 1 Per Engine
Quick Specs
| Type | Plain Woodruff Key (Camshaft) |
|---|---|
| OE Part # | 3902332 |
| Function | Prevents cam gear rotation on camshaft; maintains timing index |
| Qty Required | 1 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–2021 | Ram 5.9L & 6.7L Cummins (B-Series/ISB) | Ram 2500/3500 |
Industrial/Off-Highway: Also used on 4B/6B and some C-Series (8.3L) engines; always confirm by ESN.
Often Paired With
- Camshaft gear & retaining bolt/washer (OE)
- Front cover/timing cover gasket set
- Assembly lube and fresh engine oil after service
What’s In The Box
- (1) Genuine Cummins Camshaft Woodruff Key (3902332)
Install Tips
- Clean the keyway and key; remove burrs. Seat key fully before installing gear.
- Align timing marks; torque cam gear fastener to factory spec.
- Rotate engine by hand to verify smooth operation before startup.
FAQ
WILL THIS FIT MY 5.9L OR 6.7L CUMMINS RAM?Yes—commonly listed for 1989–2021 Ram 2500/3500 5.9L & 6.7L Cummins. Always verify by VIN/ESN if components have been changed.
WHAT DOES A CAMSHAFT WOODRUFF KEY DO?It locks the cam gear to the camshaft so the gear cannot slip, keeping valve timing indexed correctly.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3902332.
DOES THIS ALSO FIT INDUSTRIAL B/C-SERIES?Yes—commonly used on 4B/6B (3.9L/5.9L) and many C-Series 8.3L applications. Verify by engine serial number.
HOW MANY DO I NEED?One per engine for the cam gear interface.
Product Videos
Custom Field
Vehicle Year 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018
Vehicle Make DODGE
ENGINE 5.9L,6.7L
