CUMMINS 3904483 OEM CRANKSHAFT GEAR ALIGNMENT DOWEL PIN – 5.9L (1989–2002)

Product Description

CUMMINS 3904483 OEM CRANKSHAFT GEAR ALIGNMENT DOWEL PIN – 5.9L (1989–2002) is the tiny OEM pin that keeps your crankshaft timing gear locked in the correct position on 5.9L B-Series engines. When you’re rebuilding, resealing, or replacing the crank gear on an 1989–2002 Dodge Ram 2500/3500, this genuine Cummins dowel maintains precise crank-to-gear alignment so your timing stays dead-on and your engine lives a long, quiet life.

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This hardened steel dowel pin uses OE dimensions (approx. 6mm x 8mm) to lock the crankshaft timing/drive gear to the crank nose, preventing gear walk, timing drift, and potential valvetrain damage on performance or work trucks. Use it anytime the crank gear has been removed or disturbed—especially on higher mileage engines where a loose or damaged dowel can turn into a very expensive failure.

FEATURES & BENEFITS

• Genuine Cummins part #3904483 – OEM material, hardness, and dimensions for reliable timing gear location.
• Critical timing alignment – Locates the crankshaft gear so cam timing and injection events stay exactly where the ECM and pump expect them.
• Perfect match for B-Series 5.9L – Designed around 1989–2002 Dodge Ram 5.9L 12V & 24V engines for trouble-free installs.
• Budget insurance during rebuilds – Inexpensive part that protects an expensive rotating assembly, especially on tuned or towing setups.
• Works with OEM crank gear & crankshaft – Direct companion to the factory crank timing gear and crankshaft used on B-Series applications.

FITMENT – CUMMINS 3904483 DOWEL PIN

This crankshaft gear alignment dowel pin is commonly used on:

• 1989–2002 Dodge Ram 2500/3500 with 5.9L Cummins 12-valve & 24-valve (B-Series)
• Typical applications: crankshaft timing/drive gear to crankshaft nose

Always verify fitment by engine serial number (ESN) and parts catalog before ordering, especially on industrial and non-Ram B-Series engines.

CROSS-REFERENCE & RELATED CUMMINS PARTS AT CPP DIESEL

• CUMMINS 3929027 OEM CRANKSHAFT GEAR – RAM 5.9L (1989–2002) – Factory crank timing/drive gear that this dowel pin locates.
• CUMMINS 3908032 OEM ENGINE CRANKSHAFT WITH GEAR – RAM 5.9L 12V/24V (1989–2002) – Complete OE crankshaft assembly including gear.
• CUMMINS 3902343 OEM CYLINDER HEAD ALIGNMENT DOWEL (RING DOWEL) – 5.9L/6.7L (1989–2018) – Genuine head-to-block locating dowel.
• CUMMINS 3900068 OEM RING DOWEL (14MM) – CYLINDER HEAD / MAIN BEARING CAP – 5.9L & 6.7L – OEM ring dowel for head and main caps.
• CUMMINS 3802820 OEM FRONT CRANKSHAFT SEAL W/ WEAR SLEEVE – 5.9L/6.7L (1989–2018) – Ideal to pair with any front-end timing or crank repair.

INSTALLATION NOTES

• Clean crank nose and gear bore thoroughly; remove any burrs or old dowel material.
• Press or tap the dowel into the crankshaft using appropriate support and tools—do not hammer directly on the pin without a driver.
• Align the crank gear with the dowel and press fully home before torqueing the crank gear bolt to factory spec.
• Always consult the Cummins service manual for torque values and procedures.

Specifications for cummins 3904483

FAQ – CUMMINS 3904483 CRANKSHAFT GEAR ALIGNMENT DOWEL PIN

WILL THIS DOWEL FIT MY 1989–2002 5.9L CUMMINS RAM?
It is cataloged for B-Series 5.9L engines commonly found in 1989–2002 Dodge Ram 2500/3500 trucks. Always confirm against your engine serial number (ESN) and Cummins parts lookup before ordering.

DO I HAVE TO REPLACE THE DOWEL PIN WHEN I REPLACE THE CRANK GEAR?
It’s strongly recommended. Any time the crank timing gear is removed or replaced, installing a fresh OEM dowel helps ensure positive alignment and reduces the chance of timing issues or gear movement on high-mileage engines.

CAN I REUSE MY OLD DOWEL PIN?
If the existing dowel shows any wear, deformation, or damage, it should be replaced. Because this part is inexpensive compared to the cost of the rotating assembly, replacing it during service is cheap insurance.

DOES THIS COME WITH THE CRANK GEAR OR CRANKSHAFT?
No. This listing is for the dowel pin only. If you need the mating components, see our genuine CUMMINS 3929027 OEM CRANKSHAFT GEAR or CUMMINS 3908032 OEM CRANKSHAFT WITH GEAR.

IS THIS A GENUINE CUMMINS PART OR AFTERMARKET?
This SKU is a genuine Cummins OEM dowel pin sourced for long service life and proper fit. For aftermarket alignment dowels, see our Interstate-McBee and other options in the alignment dowels category.

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