INTERSTATE MCBEE
INTERSTATE-MCBEE M-3900257 GEAR HOUSING DOWEL PIN (KILLER DOWEL) 89–02 5.9L CUMMINS (AFTERMARKET)
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- SKU:
- MCBM-3900257
- MPN:
- M-3900257
- Shipping:
- Calculated at Checkout
Description
Interstate-McBee M-3900257 Gear Housing Dowel Pin (Killer Dowel Pin) – 89–02 5.9L Cummins
Heavy-duty gear housing dowel pin, also known as the “killer dowel,” designed to OEM dimensions for 1989–2002 Dodge Ram 5.9L Cummins engines (12- and 24-valve). An aftermarket replacement built for precision alignment and long-term reliability in the timing gear assembly.
- Exact OEM fit: Replaces Cummins original dowel pin—precise alignment for gear housing.
- High-strength steel construction: Durable, long-lasting, designed to resist shear forces.
- Aftermarket value: Cost-effective alternative to OEM pin, with guaranteed fitment quality.
- Essential maintenance item: Replace whenever front gear housing is disturbed or removed.
Specifications
| Part Number | M-3900257 (Interstate-McBee) |
|---|---|
| OEM Reference | N/A (gear housing dowel pin manufacturer spec) |
| Engine Fitment | 5.9L Cummins B-Series |
| Applicable Years | 1989–2002 (12-valve and 24-valve) |
| Material | High-strength steel |
| Position | Gear housing alignment (killer dowel) |
Vehicle Fitment
Always verify with engine serial number (ESN) if available.
- Dodge Ram 2500/3500 5.9L Cummins
- 1989–1998 12-Valve 6BT
- 1998.5–2002 24-Valve ISB
- General Use: Fits all B-series 5.9L Cummins engine builds in the above years.
Installation Notes
- Always replace the dowel pin when disassembling the gear housing to ensure correct alignment.
- Press-fit installation; make sure the housing is clean and aligned prior to seating the new pin.
- Check fitment against the housing; pin should seat flush but not protrude.
Warranty
Interstate-McBee replacement parts include manufacturer warranty—terms vary by product category. Contact us for detailed warranty information regarding this dowel pin.
Cross-Reference
Designed as a direct replacement for the Cummins gear housing dowel pin used in 5.9L B-series engines. No Cummins part number typically assigned.
Why Choose CPP Diesel
- Expert-backed fitment support for Cummins parts.
- Fast, reliable shipping and hassle-free returns.
- Verified inventory for timely rebuild turnaround.
FAQ
When should this dowel pin be replaced?Always replace the dowel pin when disassembling the front gear housing or timing cover to ensure precise alignment and prevent future timing errors.
Is this the same as a Cummins OEM dowel pin?
Yes—Interstate-McBee M-3900257 matches OEM dimensions and fitment quality as a high-strength aftermarket alternative.
Will this work on both 12-valve and 24-valve 5.9L engines?
Yes—it fits both the 12-valve (1989–1998) and 24-valve ISB (1998.5–2002) B-series Cummins engines.
Do I need special tools to install?
Typically, a press or drift setup sufficient for a secure fit. Ensure the housing is clean and supportive to avoid misalignment.
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