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CUMMINS

CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)

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SKU:
CUM3944797
MPN:
3944797
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  • CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)
  • CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)
  • CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)
  • CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)
  • CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)
  • CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)
  • CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE – RAM 5.9L (1989–2002)
$208.21

Description

Genuine Cummins

Cummins 3944797 — Crankcase Breather With Integrated Oil Fill

MPN: 3944797  |  Also Known As: breather assembly, CCV breather, oil fill breather  |  Function: Vents crankcase pressure and provides a factory oil-fill point

Why This Part

  • OE ventilation to control crankcase pressure and reduce oil carryover.
  • Integrated oil-fill for fast, clean top-offs—no spills.
  • Direct-fit for 1989–2002 5.9L Cummins Ram (12V & 24V).
  • Genuine Cummins casting and hardware for long service life.
OE Fit Stock Replacement 1 Per Engine

Quick Specs

Type Crankcase breather with integrated oil-fill
OE Part # 3944797
Qty Required 1 per engine (sold individually)
Use Case Restores proper crankcase ventilation and factory oil-fill location

Verified Fitment (Automotive)

Year RangeEngineChassis
1989–1998 5.9L Cummins 12-Valve (6BT) Ram 2500/3500
1998.5–2002 5.9L Cummins 24-Valve (ISB/VP44) Ram 2500/3500

Industrial/Off-Highway: Seen on 4B/6B/ISB applications—verify by ESN for non-automotive equipment.

Often Paired With

  • Breather/CCV hose and clamps (inspect/replace if brittle)
  • Valve cover gasket (if the cover is removed during service)
  • Fresh oil & filter after any major engine service

What’s In The Box

  • (1) Genuine Cummins Crankcase Breather Assembly with Oil-Fill (3944797)
  • Gaskets/hardware sold separately (verify by VIN/ESN)

Install Tips

  • Clean mating surfaces and replace any seals/gaskets disturbed during removal.
  • Verify breather hose routing; check for kinks or blockages.
  • After install, monitor for leaks and confirm proper crankcase ventilation.

FAQ

WILL THIS FIT MY 1989–2002 5.9L CUMMINS RAM?

Yes—this breather with oil-fill is used across 1989–1998 12V and 1998.5–2002 24V 5.9L Ram applications (verify by VIN/ESN).

WHAT DOES THE CRANKCASE BREATHER DO?

It vents excess crankcase pressure to reduce leaks and oil carryover while maintaining proper engine performance.

DOES THIS INCLUDE THE OIL-FILL OPENING?

Yes—3944797 features an integrated oil-fill hole in the breather housing for quick, clean top-offs.

IS THIS A GENUINE CUMMINS PART?

Yes—OE Cummins 3944797 built to factory specifications for fit and durability.

WHAT ABOUT INDUSTRIAL ENGINES?

It appears on several 4B/6B/ISB industrial variants. Always confirm by ESN for non-automotive equipment.

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Additional Information

MAKE:
DODGE
YEAR:
1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002
ENGINE:
5.9L
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