Product Description
Genuine Cummins
Cummins 3949326 — Ring Dowel (Alignment Pin) for Front Gear Housing / Cylinder Block
MPN: 3949326 | Also Known As: ring dowel, dowel pin, alignment dowel | Use Case: Aligns front gear housing or block-mounted components
Why This Part
- ✓ OE alignment accuracy to keep housings and covers perfectly located.
- ✓ Direct-fit on ISB 5.9L/6.7L applications; commonly used in front gear housing and block alignment.
- ✓ Prevents leaks & gear wear caused by misalignment.
- ✓ Durable OE material for repeated service cycles.
OE Fit Precise Alignment Sold Individually
Quick Specs
| Type | Ring dowel / alignment pin |
|---|---|
| OE Part # | 3949326 |
| Typical Qty | Commonly 2 used per assembly; sold individually |
| Primary Location | Front gear housing or cylinder block alignment |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2018 | Ram 5.9L / 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Used primarily on EPA13 ISB/QSB 6.7 variants—always confirm by ESN.
Often Paired With
- Front gear housing gasket & seals (year-specific)
- Front crank seal when servicing timing/cover components
- New fasteners where factory TTY bolts are specified
What’s In The Box
- (1) Genuine Cummins Ring Dowel (3949326)
Install Tips
- Clean bores; lightly oil for corrosion protection before install.
- Press or tap squarely to seated depth—avoid deforming the dowel.
- Align mating component carefully to prevent scoring or misalignment.
FAQ
WILL THIS FIT MY 2003–2018 5.9L/6.7L RAM?Yes—this OE dowel is commonly used on 2003–2018 ISB 5.9L/6.7L front gear housing/cylinder block alignment (verify by VIN/ESN and component location).
HOW MANY DOWELS DO I NEED?They’re sold individually. Many assemblies use two alignment dowels; replace any damaged or missing units.
WHAT DOES A “RING DOWEL” DO?It precisely locates housings/covers relative to the block, reducing leaks, gear wear, and vibration due to misalignment.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3949326 built to factory tolerances.
DOES THIS ALSO APPLY TO INDUSTRIAL ISB/QSB 6.7?Yes—Cummins catalogs this dowel primarily on EPA13 ISB/QSB 6.7 applications; confirm by ESN.
