Product Description
Genuine Cummins
Cummins 3904483 — Crankshaft Gear Alignment Dowel Pin
MPN: 3904483 | Also Known As: dowel pin, roll pin, crank gear alignment pin | Cross-Refs (ID only): 3901016
Why This Part
- ✓ Locks the crankshaft gear in place for factory-correct timing during assembly/service.
- ✓ OE dimensions & hardness for a precise, interference-fit in the crank gear.
- ✓ Ideal during rebuilds or timing gear service to prevent gear slippage and wear.
- ✓ Genuine Cummins pin—no guesswork on fitment.
OE Fit Critical Timing Part 1 Per Gear Service
Quick Specs
| Type | Crankshaft gear alignment dowel (roll pin) |
|---|---|
| OE Part # | 3904483 (alt. ref: 3901016) |
| Dimensions | ~0.236" dia × 0.312" long (≈6 mm × 8 mm) |
| Quantity | Sold individually |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1993 | 5.9L 12-Valve (VE) | D/W 250–350 / Early Ram |
| 1994–1998 | 5.9L 12-Valve (P7100) | Ram 2500/3500 |
| 1998.5–2002 | 5.9L 24-Valve (VP44) | Ram 2500/3500 |
Notes: Intended for B-Series 5.9L applications through 2002. Some industrial B-Series and later engines also use 3904483—verify by ESN before ordering.
Often Paired With
- Crankshaft Gear (5.9L 1989–2002): Cummins 3929027
- Front cover/timing service parts (seals, gaskets, fasteners)
What’s In The Box
- (1) Genuine Cummins Crankshaft Gear Alignment Dowel Pin (3904483)
Install Tips
- Inspect the crank gear bore; replace the gear if out-of-round or damaged.
- Press/drive the dowel squarely; confirm full seating and alignment before torqueing the crank gear.
- Follow Cummins service procedures; verify by ESN.
FAQ
WILL THIS FIT MY 5.9L 12-VALVE OR 24-VALVE?Yes—fits 1989–1998 12-valve and 1998.5–2002 24-valve 5.9L B-Series applications (verify by VIN/ESN).
IS THIS THE PIN THAT LOCATES THE CRANKSHAFT GEAR?Correct—this dowel/roll pin indexes the crank gear to prevent rotation and preserve timing during operation.
WHAT ARE THE DIMENSIONS?Approx. 6 mm (0.236") diameter × 8 mm (0.312") length—OE spec for an interference fit.
IS 3901016 THE SAME THING?3901016 is a commonly listed related number/cross-reference for this dowel pin.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3904483 for proper fit and durability.
Product Videos
Custom Field
MAKE DODGE RAM
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
ENGINE 5.9L,6.7L
