Product Description
The CUMMINS 3914868 OEM VACUUM PUMP BLOCK-OFF / COVER PLATE is the genuine Cummins solution for sealing the vacuum-pump opening in the gear housing on 5.9L B-series engines. When you delete the factory belt-driven vacuum pump on a 1994–2002 Ram 2500/3500, this cover plate restores a clean, leak-free OE-style seal so you can run a power-steering–only accessory drive or custom front-drive setup without compromising durability.
Features & Benefits
- Genuine Cummins 3914868 cover plate for B-series 5.9L applications.
- Blocks off the factory vacuum-pump mounting pad on the gear housing/front cover.
- Ideal for custom builds, race trucks, and conversions using hydroboost or electric vacuum.
- OE-grade sealing surface for use with the proper Cummins gasket (sold separately).
- Direct bolt-on fit to the OEM gear case – no grinding, welding, or modification required.
- Maintains factory alignment and integrity of the timing gear housing.
Fitment
- Automotive (Dodge/Ram):
- 1994–1998 Ram 2500 / 3500 – 5.9L Cummins 12-valve (P7100)
- 1998.5–2002 Ram 2500 / 3500 – 5.9L Cummins 24-valve (VP44)
- Engine Family: Cummins B-series 5.9L (BS3 B engines) and other B-series applications where 3914868 is specified (verify by engine serial number for industrial/off-highway use).
Note: For pre-1994 or non-Ram applications, always confirm by Cummins ESN or OEM parts catalog before ordering.
Cross-Reference & Related Cummins Parts
Use this plate with genuine Cummins vacuum-pump and oil-supply components when servicing or deleting the OEM pump:
- Gasket / mounting seal (various Cummins references – verify by ESN).
- CUMMINS 3923084 OEM VACUUM PUMP OIL SUPPLY LINE – 5.9L 12V (1994–1998)
- CUMMINS 3934396 OEM VACUUM PUMP OIL SUPPLY LINE – 5.9L (1998.5–2002)
- CUMMINS 4089742 OEM VACUUM PUMP RESEAL KIT – 5.9L CUMMINS (1994–2002)
- CUMMINS 3932321 OEM OIL FITTING – MALE CONNECTOR (ENGINE BLOCK TO TEE) – 5.9L 12V (1994–1998)
Installation Notes
- Remove the factory vacuum pump and related hardware per service manual procedures.
- Clean the gear-housing sealing surface thoroughly; remove old gasket material and sealant.
- Install the correct Cummins gasket and position the 3914868 plate with the machined face toward the gasket.
- Apply thread locker or fresh engine oil to fasteners as specified by Cummins.
- Torque bolts evenly in a criss-cross pattern to factory spec and recheck for leaks after initial run-in.
Specifications for cummins 3914868
| Attribute | Value |
|---|---|
| Manufacturer | Cummins Genuine Parts |
| Cummins Part Number | 3914868 |
| UPC | Not specified by manufacturer |
| GTIN | Not specified by manufacturer |
| Application | Vacuum pump / accessory drive block-off cover for Cummins B-series 5.9L engines |
| Engine Compatibility | 5.9L Cummins B-series (BS3), including 1994–2002 Ram 2500/3500 5.9L 12V & 24V (verify by ESN for non-Ram) |
| Cross Reference | 3200782, 4942479, 208482, 211168, 205159 (verify in OE catalog before substitution) |
| E-Codes / Emissions Family | Used primarily on BS3 5.9L B engines; additional E-code details not specified – confirm by ESN |
| Shipping Weight | Approx. 1.3 lb packaged (varies by box and packing materials) |
| Package Dimensions | Approx. 8.25 in x 7.65 in x 1.55 in |
| Shipping Method | Standard ground, small parcel |
| Prop 65 | No specific California Prop 65 warning identified for this part |
FAQ
WILL THIS FIT MY 1994–2002 DODGE RAM 5.9L CUMMINS?Yes, this genuine Cummins 3914868 cover plate is used to block off the factory vacuum-pump opening on 1994–2002 Ram 2500/3500 trucks with the 5.9L B-series diesel. Always verify by VIN or engine serial number if your truck has been swapped or modified.
DO I NEED A NEW GASKET WHEN INSTALLING THIS PLATE?
Yes. You should always install a fresh Cummins gasket when replacing or deleting the vacuum pump. Reusing old gaskets can lead to seepage or leaks. Pair this plate with the correct Cummins gasket for your gear housing and follow the factory torque specs.
CAN I RUN THIS PLATE WITH NO VACUUM PUMP ON A STREET TRUCK?
This plate simply seals the opening; it does not provide vacuum. If your truck still uses vacuum for HVAC controls, 4x4 hubs, or other systems, you must provide an alternate vacuum source (electric pump, etc.) before deleting the factory pump. Race-only or off-road applications that do not require vacuum can typically run this plate without additional changes.
WHAT OTHER CUMMINS PARTS SHOULD I REPLACE WHILE I AM HERE?
Many owners pair this cover plate with a new vacuum pump oil supply line and fittings, or reseal the pump before deleting it. Consider genuine Cummins parts like the 3923084 or 3934396 oil supply lines, the 4089742 reseal kit, and the 3932321 oil fitting to keep the front-of-engine oil circuit reliable.
IS THIS A GENUINE CUMMINS PART OR AFTERMARKET?
This is a genuine Cummins 3914868 cover plate – not an offshore knockoff. Using OEM hardware ensures correct bolt-hole alignment, sealing surface quality, and long-term durability on your B-series engine.
