Product Description
The CUMMINS 3944797 OEM CRANKCASE BREATHER WITH OIL FILL HOLE is designed for 1989–2002 Dodge Ram trucks equipped with the 5.9L Cummins diesel engine. This genuine Cummins breather assembly helps regulate crankcase pressure while providing a factory-style oil fill location for routine engine maintenance.
Use this part when replacing a damaged, leaking, clogged, or missing crankcase breather assembly. Proper crankcase ventilation helps reduce oil leaks, maintain engine cleanliness, and support long-term engine reliability. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM crankcase breather assembly
- Integrated oil fill hole for convenient servicing
- Direct-fit replacement for applicable 5.9L Cummins engines
- Helps regulate crankcase pressure and ventilation
- Designed to meet original Cummins specifications
- Ideal for maintenance, repair, or engine restoration projects
FITMENT
- 1989–1993 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- 1994–1998 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- 1998.5–2002 Dodge Ram 2500/3500 5.9L Cummins 24-Valve
- Select Cummins B-Series industrial and commercial applications
WHAT'S INCLUDED
- 1 Cummins 3944797 OEM Crankcase Breather With Oil Fill Hole
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3944797
- Cummins Crankcase Ventilation Components
- Cummins Valve Cover Components
- Cummins Breather Gaskets and Seals
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3944797
- Part Type: Crankcase Breather Assembly
- Engine Compatibility: 5.9L Cummins
- Fitment Years: 1989–2002
- Vehicle Application: Dodge Ram 2500 and 3500
- Oil Fill Provision: Yes
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
FAQ
Will this crankcase breather fit my truck?
This breather fits many 1989–2002 Dodge Ram trucks equipped with the 5.9L Cummins diesel engine. Always verify fitment by engine serial number before ordering.
What does a crankcase breather do?
The crankcase breather allows excess crankcase pressure and vapors to escape while helping prevent pressure buildup that can contribute to oil leaks and seal failures.
Does this breather include an oil fill opening?
Yes. Cummins 3944797 features an integrated oil fill hole that allows convenient engine oil servicing.
When should a crankcase breather be replaced?
Replacement is recommended when the breather becomes damaged, clogged, cracked, excessively contaminated, or is no longer sealing properly.
Is this a genuine Cummins part?
Yes. Cummins 3944797 is a genuine OEM Cummins crankcase breather assembly manufactured to factory specifications.
Do I need any related parts?
Inspect the breather gasket, valve cover components, ventilation hoses, and related seals during installation and replace worn parts as necessary.
