ALIGNMENT DOWELS

1989–1993 Dodge Cummins Alignment Dowels

Proper engine alignment is critical when working on your 5.9L Cummins. Our selection of alignment dowels for 1989–1993 Dodge Ram Cummins trucks ensures precision fitment between the engine block, transmission, and other critical components. Whether you’re doing a rebuild or routine maintenance, CPP Diesel has the parts you can trust.

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Helpful Notes

Always check dowel fitment with your specific year (1989–1993 5.9L Cummins).
Use new dowels during major rebuilds to avoid alignment issues.
Pair with new gaskets and hardware for the best results.

Frequently Asked Questions

Do I need to replace alignment dowels during an engine rebuild?

Yes. Replacing alignment dowels ensures precise fitment and prevents issues with block and transmission alignment.

Will these dowels fit all 1989–1993 Cummins engines?

They are designed for the 5.9L 12-valve Cummins found in Dodge Ram trucks from 1989 through 1993.

Are OEM and aftermarket dowels available?

Yes. CPP Diesel offers both OEM replacement dowels and performance-grade options.

Can worn dowels cause engine problems?

Improper alignment can lead to leaks, premature wear, and even transmission issues. Always replace worn or missing dowels.

Do you ship Cummins alignment dowels quickly?

Yes. Most orders ship within 1 business day from our U.S. warehouse.

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INTERSTATE-MCBEE M-3902343 CYLINDER HEAD ALIGNMENT DOWEL 89–18 5.9L / 6.7L CUMMINS (AFTERMARKET REPLACEMENT)

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INTERSTATE-MCBEE M-3900068 14MM MAIN BEARING CAP DOWEL 89-18 5.9L/6.7L CUMMINS (AFTERMARKET REPLACEMENT)

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CUMMINS 3900068 OEM RING DOWEL (14MM) – CYLINDER HEAD / MAIN BEARING CAP – 5.9L & 6.7L CUMMINS

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INTERSTATE-MCBEE M-3900257 GEAR HOUSING DOWEL PIN (KILLER DOWEL) 89–02 5.9L CUMMINS (AFTERMARKET)

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

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CUMMINS 3902343 OEM CYLINDER HEAD ALIGNMENT DOWEL (RING DOWEL) – 5.9L/6.7L CUMMINS (1989–2018)

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INTERSTATE-MCBEE M-3902343 CYLINDER HEAD ALIGNMENT DOWEL 89–18 5.9L / 6.7L CUMMINS (AFTERMARKET REPLACEMENT)
Interstate-McBee M-3902343 Cylinder Head Alignment Dowel – 1989–2018 5.9L / 6.7L Cummins Premium cylinder head alignment dowel (also known as a ring dowel) built to OEM-equivalent specs for Cummins B / ISB / QSB 5.9L and 6.7L engines. This...

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INTERSTATE-MCBEE M-3900068 14MM MAIN BEARING CAP DOWEL 89-18 5.9L/6.7L CUMMINS (AFTERMARKET REPLACEMENT)
Interstate-McBee M-3900068 – 14mm Main Bearing Cap Dowel (1989–2018 5.9L/6.7L Cummins) The Interstate-McBee M-3900068 is an OEM-style 14mm main bearing cap ring dowel used on Cummins B-Series engines to precisely align the main cap during...

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CUMMINS 3900068 OEM RING DOWEL (14MM) – CYLINDER HEAD / MAIN BEARING CAP – 5.9L & 6.7L CUMMINS
Genuine Cummins Cummins 3900068 — Ring Dowel, 14 mm (Cylinder Head / Main Bearing Cap Alignment) MPN: 3900068 | Also Known As: dowel ring, locating sleeve, ring dowel | Size: 14 mm | Cross-Refs:...

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INTERSTATE-MCBEE M-3900257 GEAR HOUSING DOWEL PIN (KILLER DOWEL) 89–02 5.9L CUMMINS (AFTERMARKET)
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...

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

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CUMMINS 3902343 OEM CYLINDER HEAD ALIGNMENT DOWEL (RING DOWEL) – 5.9L/6.7L CUMMINS (1989–2018)
Cummins 3902343 — Genuine Cylinder Head Alignment Dowel (Ring Dowel) MPN: 3902343 | Also Known As: ring dowel, head alignment dowel | Position: Inserts in the engine block to locate the cylinder head The genuine Cummins...

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