CUMMINS 3923898 OEM FRONT TIMING GEAR COVER – 5.9L (1994–2002)

Product Description

Cummins 3923898, OEM front timing gear cover, genuine Cummins 5.9L B-series timing cover, Ram 2500 3500 5.9 Cummins 12-valve 24-valve front cover, gear case cover, tin timing cover, KDP repair parts, Cummins genuine parts, 1994 1995 1996 1997 1998 1999 2000 2001 2002 Dodge Cummins engine parts Keep your 5.9L Cummins sealed and leak-free with the Cummins 3923898 OEM Front Timing Gear Cover. This is a genuine stamped-steel front timing cover that bolts to the timing gear housing and protects the cam, crank, and accessory drive gears on 1994–2002 Dodge Ram 2500/3500 trucks with the 5.9L B-series diesel. If you’re chasing oil leaks, repairing a KDP (killer dowel pin) failure, or bringing a high-mileage workhorse back to factory condition, starting with an authentic Cummins gear cover ensures OE fit, finish, and durability.

Why Choose Genuine Cummins 3923898?

• True OEM quality: Manufactured by Cummins to match the original front timing cover used on 5.9L B-series engines.
• Exact fit for 1994–2002 Ram 5.9L: Designed around the 2nd-gen 12-valve and 24-valve timing gear housings—no slotting, trimming, or guessing.
• Stamped-steel construction: Resists distortion and maintains proper sealing surface at the timing gear case.
• Ideal for KDP repairs: A perfect companion when addressing killer dowel pin issues or repairing front gear damage.
• Built for long service life: Genuine Cummins coatings and material spec help prevent premature rust and seepage.

Fitment

Always verify fitment by engine serial number (ESN) when possible—especially for industrial, agricultural, or generator applications.

• 1994–1998 Dodge Ram 2500/3500 with 5.9L Cummins 12-valve (P7100)
• 1998.5–2002 Dodge Ram 2500/3500 with 5.9L Cummins 24-valve ISB (VP44)
• Engine family: 5.9L Cummins B-series (6BT / ISB) front timing gear cover
• Primary application: On-road Dodge Ram 2nd-gen trucks (1994–2002)

Cross-Reference & Related Cummins Parts

Cummins 3923898 supersedes or cross-references several earlier front cover IDs. CPP Diesel also stocks the matching genuine Cummins gaskets and front crank seals to complete your front-engine service.

• Front cover gasket (Cummins OEM): CUMMINS 3918673 OEM TIMING GEAR CASE FRONT COVER GASKET – RAM 5.9L (1994–2002)
• Front crankshaft seal (Cummins OEM): CUMMINS 3804899 OEM FRONT CRANKSHAFT SEAL – RAM 5.9L/6.7L (2003–2018) (select by ESN/fitment when servicing later ISB engines).
• Front crankshaft seal service kit (Cummins OEM): CUMMINS 3937111 FRONT CRANKSHAFT SEAL SERVICE KIT – 5.9L (1989–2007) – includes installer hardware for correct seal depth.
• Timing gear housing (later ISB reference): CUMMINS 3970305 OEM TIMING GEAR HOUSING – ISB 5.9L (2003–2007) – not a direct swap for 1994–2002 trucks but useful for understanding later ISB front-gear architecture.
• ID-only cross-reference numbers (not all sold individually on CPP Diesel): 3917800, 3917801, 3918675, 4991279

Installation Notes

• Inspect the timing gear housing sealing surface for nicks or corrosion before installing the new cover.
• Use the correct Cummins gasket (3918673) and follow factory torque specs and tightening sequence.
• Whenever the cover is off, closely inspect or address the killer dowel pin (KDP) on 12-valve engines.
• Replace the front crankshaft seal at the same time to minimize repeat labor.

FAQ

Will this cover fit both 12-valve (1994–1998) and 24-valve (1998.5–2002) 5.9L engines?

Yes. Cummins 3923898 is designed as the front timing gear cover for 1994–2002 Dodge Ram 2500/3500 trucks with the 5.9L B-series diesel, including 12-valve (P7100) and 24-valve (VP44) applications. Always confirm with your engine serial number for non-truck or swapped applications.

Do I need to replace the front cover gasket when installing this part?

Absolutely. You should always install a new front cover gasket when replacing the timing gear cover. CPP Diesel recommends the genuine Cummins 3918673 gear cover gasket for the best seal and leak prevention.

Should I replace the front crankshaft seal at the same time?

It’s highly recommended. With the front of the engine open, replacing the front crank seal is inexpensive insurance against future oil leaks. Pair this cover with the Cummins 3937111 front crankshaft seal kit or the Cummins 3804899 front crankshaft seal as appropriate for your engine.

Is this an aftermarket replacement or genuine Cummins?

This part is a genuine Cummins OEM front timing gear cover (PN 3923898), sourced through CPP Diesel. It is not an aftermarket reproduction and is built to Cummins’ material and dimensional specs.

Does this cover include bolts, gasket, or a front crankshaft seal?

No. This listing is for the bare front timing gear cover only. Hardware, gasket, and front crankshaft seal are sold separately. See the Cross-Reference & Related Cummins Parts section for compatible OEM part numbers sold by CPP Diesel.

Specifications for cummins 3923898