CUMMINS 3939355 OEM VE PUMP TO GEAR HOUSING GASKET – 5.9L 12-VALVE (1989–1993)

Product Description

The CUMMINS 3939355 OEM VE PUMP TO GEAR HOUSING GASKET is the genuine seal that sits between the Bosch VE rotary injection pump and the front gear housing on first-gen 5.9L 12-valve Cummins engines. When the VE pump is removed for reseal, timing adjustment, or replacement, this gasket should always be renewed to prevent engine oil leaks, fuel seepage, and aerated fuel that can cause hard starting and poor performance. Built to Cummins OEM specifications, this composite gasket maintains proper clamp load, alignment, and sealing on high-mileage 5.9L B-series engines.

Designed for 1989–1993 Dodge Ram 2500/3500 with the 5.9L 12-valve Cummins VE pump, the 3939355 gasket is also used on select B-series and 4BT/6BT industrial applications. Always verify by engine serial number (ESN) on non-automotive engines. If you’re refreshing a tired first-gen fuel system or swapping to a fresh VE pump, this is the correct OEM gasket to install between the pump flange and timing gear case.

Cummins 3939355 VE pump to gear housing gasket, genuine Cummins fuel pump gasket, first gen 5.9L 12-valve VE rotary pump seal, 1989 1990 1991 1992 1993 Dodge Ram D250 D350 5.9 Cummins B-series BS3 4BT 6BT fuel system gasket OEM

Fitment

• Automotive:
  • 1989–1993 Dodge/Ram D250 & D350 / 2500 & 3500 with 5.9L 12-valve Cummins (VE rotary injection pump)
  • Location: Between VE injection pump mounting flange and front timing gear housing
• Industrial / Off-Highway (B-Series):
  • Used on select 5.9L B / 6BT / BS3 engines with VE rotary pumps
  • Used on select 3.9L 4BT engines with VE rotary pumps
  • Always confirm by engine serial number (ESN) and parts book before ordering for non-automotive equipment.

What This Gasket Does

• Seals the interface between the VE rotary injection pump and the gear housing
• Prevents engine oil leaks at the pump mounting location
• Helps prevent air intrusion and fuel seepage that can cause hard starting or low power
• Maintains correct pump alignment and clamp load on the gear case

Cross-Reference / Related Cummins Parts (CPP DIESEL)

Pair this Cummins 3939355 gasket with other genuine Cummins fuel-system seals and hardware for a complete first-gen refresh:

• CUMMINS 3918188 OEM 8MM FUEL SYSTEM SEALING WASHER – RAM 5.9L (1989–1998)
• CUMMINS 3900808 OEM 9MM FUEL INJECTOR SEALING WASHER – 5.9L CUMMINS (1989–1991)
• CUMMINS 3282437 AFC BOOST REFERENCE HOSE (AIR FUEL CONTROL TUBE) – 5.9L 12V (1989–1993)
• CUMMINS 3969988 OEM INTAKE HEATER GRID GASKET – 5.9L CUMMINS (1989–2007)

Install Tips

• Thoroughly clean both the VE pump flange and gear housing surface; remove all old gasket material.
• Install the new gasket dry or per Cummins service manual instructions—avoid excess RTV or sealant.
• Support the weight of the pump during installation so the gasket isn’t dragged or torn on the dowels.
• Tighten mounting fasteners evenly in a criss-cross pattern and torque to factory specification.
• After the first heat cycle, inspect for any oil weeping around the pump/housing joint.

FAQ

WILL THIS FIT MY 1989–1993 FIRST-GEN 5.9L CUMMINS?

Yes. If your truck is a 1989–1993 Dodge/Ram with the 5.9L 12-valve Cummins and Bosch VE rotary injection pump, this is the correct OEM pump-to-gear-housing gasket. It is the gasket sandwiched between the pump flange and the front gear case.

DO I NEED SEALANT WITH THIS GASKET?

In most cases, Cummins specifies a clean, dry installation on flat, oil-free surfaces. Follow the Cummins service manual for your engine. If a light dressing is recommended, use only a thin film and avoid excess RTV that can squeeze out and affect pump alignment or oil passages.

HOW MANY GASKETS ARE REQUIRED PER ENGINE?

One (1) gasket is used per engine at the VE pump mounting location. Any time the VE injection pump is removed from the gear housing, you should replace this gasket instead of reusing the old one.

IS THIS A GENUINE CUMMINS PART OR AFTERMARKET?

This listing is for an OEM Cummins 3939355 gasket. Using the genuine Cummins gasket ensures proper thickness, material, and long-term sealing performance compared to generic copies.

DOES THIS FIT P7100 (’94–’98) OR VP44 (’98.5–’02) PUMPED TRUCKS?

No. Those later trucks use different injection pumps and different mounting gaskets. The 3939355 gasket is specifically for VE-pump B-series engines and should not be used on P7100 or VP44 applications.

CAN THIS GASKET BE USED ON 4BT OR INDUSTRIAL B-SERIES ENGINES?

Yes, many 4BT and industrial 5.9L B-series engines using a VE rotary pump also use the 3939355 gasket. However, you should always confirm by engine serial number (ESN) and parts book for non-automotive applications.

Specifications for cummins 3939355