Fleetguard 3957987 CCV Filter | 2003–2005 Dodge Ram 5.9L Cummins Crankcase Vent Filter
Description
The 5.9L Common Rail Cummins is known for its legendary reliability, but one maintenance item that is often forgotten is the Crankcase Ventilation (CCV) filter.
Every diesel engine produces blow-by—combustion gases that escape past the piston rings and enter the crankcase. These gases carry oil vapor that must be filtered before being vented through the crankcase ventilation system. Over time, the filter becomes saturated and restricted, reducing its ability to properly separate oil from the crankcase gases.
The Fleetguard 3957987 CCV Filter is the genuine Cummins replacement filter for 2003–2005 Dodge Ram 5.9L Cummins trucks. Replacing this filter helps maintain proper crankcase ventilation, reduces excess oil vapor entering the engine bay, and helps prevent elevated crankcase pressure that can contribute to oil leaks and premature seal wear. It includes a new O-ring for a complete installation.
Features
- Genuine Fleetguard / Cummins replacement CCV filter
- Direct replacement for the factory crankcase breather
- Includes new sealing O-ring
- Helps separate oil vapor from crankcase gases
- Maintains proper crankcase ventilation
- Direct bolt-in installation
- OEM-quality construction
- No modifications required
What Does the CCV Filter Do?
As your engine runs, a small amount of combustion pressure escapes into the crankcase. This is completely normal and is known as blow-by.
The CCV filter separates much of the suspended oil mist from these gases before they exit the crankcase. This helps:
- Reduce oil residue around the engine
- Maintain proper crankcase pressure
- Protect engine seals and gaskets
- Improve crankcase ventilation
- Keep the engine operating as designed
Without a properly functioning CCV filter, crankcase pressure can increase, forcing oil past seals and gaskets while allowing more oil vapor to escape through the breather system.
Glacier Tech Tip
One of the most common signs of a plugged CCV filter isn't engine performance—it's oil leaks.
As the filter becomes restricted, crankcase pressure rises. Since the crankcase can no longer vent efficiently, pressure begins looking for the path of least resistance.
This can contribute to leaks around:
- Front crankshaft seal
- Rear main seal
- Valve cover gasket
- Dipstick tube
- Other engine seals and gaskets
Replacing the CCV filter on schedule is inexpensive preventative maintenance that may help avoid much more expensive repairs later.
Why Choose Genuine Fleetguard?
Fleetguard products are engineered specifically for Cummins engines and are designed to meet the airflow, filtration, and durability standards established by the OEM.
Benefits include:
- Proper crankcase airflow
- Excellent oil separation
- OEM-quality fit and sealing
- Long service life
- Reliable engine protection
Choosing a genuine Fleetguard filter helps ensure your crankcase ventilation system continues operating exactly as Cummins intended.
Applications
Fits:
- 2003 Dodge Ram 2500 5.9L Cummins
- 2003 Dodge Ram 3500 5.9L Cummins
- 2004 Dodge Ram 2500 5.9L Cummins
- 2004 Dodge Ram 3500 5.9L Cummins
- 2005 Dodge Ram 2500 5.9L Cummins
- 2005 Dodge Ram 3500 5.9L Cummins
Does NOT fit:
- 2006–2007 Dodge Ram 5.9L Cummins
Important: Cummins integrated the CCV filter into the valve cover beginning in 2006. On 2006–2007 trucks, the filter is not serviceable separately and replacement requires a complete valve cover assembly.
Important Notes
- Genuine Fleetguard / Cummins replacement filter.
- Includes new O-ring for installation.
- Fits 2003–2005 5.9L Common Rail Cummins only.
- Not compatible with 2006–2007 5.9L Cummins engines.
- Inspect the breather housing for oil buildup during installation.
Common Failure Point
The CCV filter is frequently overlooked because it doesn't typically trigger a warning light or cause an immediate drivability issue.
Instead, it slowly becomes more restrictive over thousands of miles. As crankcase pressure increases, owners may notice oil seepage around engine seals, increased oil residue around the breather, or excessive oil vapor under the hood.
Replacing the CCV filter at regular service intervals helps maintain proper crankcase ventilation and protects engine seals from unnecessary pressure.
Complete Your 5.9L Cummins Maintenance
Keep your 5.9L Cummins running at its best by pairing your new CCV filter with other genuine Fleetguard maintenance components:
- Fleetguard AF4177 Engine Air Filter
- Fleetguard LF16035 Engine Oil Filter
- Fleetguard Fuel Filters
- Glacier Diesel Power Fuel Pressure Test Kits
- Glacier Diesel Power Fuel System Components
- Glacier Diesel Power Performance Air Intake Components
Routine maintenance with genuine Fleetguard filtration helps protect your engine from contaminants, maintain proper crankcase ventilation, and preserve the legendary reliability of the 5.9L Cummins for years to come.
Fleetguard 3957987 CCV Filter | 2003–2005 Dodge Ram 5.9L Cummins Crankcase Vent Filter
Description
The 5.9L Common Rail Cummins is known for its legendary reliability, but one maintenance item that is often forgotten is the Crankcase Ventilation (CCV) filter.
Every diesel engine produces blow-by—combustion gases that escape past the piston rings and enter the crankcase. These gases carry oil vapor that must be filtered before being vented through the crankcase ventilation system. Over time, the filter becomes saturated and restricted, reducing its ability to properly separate oil from the crankcase gases.
The Fleetguard 3957987 CCV Filter is the genuine Cummins replacement filter for 2003–2005 Dodge Ram 5.9L Cummins trucks. Replacing this filter helps maintain proper crankcase ventilation, reduces excess oil vapor entering the engine bay, and helps prevent elevated crankcase pressure that can contribute to oil leaks and premature seal wear. It includes a new O-ring for a complete installation.
Features
- Genuine Fleetguard / Cummins replacement CCV filter
- Direct replacement for the factory crankcase breather
- Includes new sealing O-ring
- Helps separate oil vapor from crankcase gases
- Maintains proper crankcase ventilation
- Direct bolt-in installation
- OEM-quality construction
- No modifications required
What Does the CCV Filter Do?
As your engine runs, a small amount of combustion pressure escapes into the crankcase. This is completely normal and is known as blow-by.
The CCV filter separates much of the suspended oil mist from these gases before they exit the crankcase. This helps:
- Reduce oil residue around the engine
- Maintain proper crankcase pressure
- Protect engine seals and gaskets
- Improve crankcase ventilation
- Keep the engine operating as designed
Without a properly functioning CCV filter, crankcase pressure can increase, forcing oil past seals and gaskets while allowing more oil vapor to escape through the breather system.
Glacier Tech Tip
One of the most common signs of a plugged CCV filter isn't engine performance—it's oil leaks.
As the filter becomes restricted, crankcase pressure rises. Since the crankcase can no longer vent efficiently, pressure begins looking for the path of least resistance.
This can contribute to leaks around:
- Front crankshaft seal
- Rear main seal
- Valve cover gasket
- Dipstick tube
- Other engine seals and gaskets
Replacing the CCV filter on schedule is inexpensive preventative maintenance that may help avoid much more expensive repairs later.
Why Choose Genuine Fleetguard?
Fleetguard products are engineered specifically for Cummins engines and are designed to meet the airflow, filtration, and durability standards established by the OEM.
Benefits include:
- Proper crankcase airflow
- Excellent oil separation
- OEM-quality fit and sealing
- Long service life
- Reliable engine protection
Choosing a genuine Fleetguard filter helps ensure your crankcase ventilation system continues operating exactly as Cummins intended.
Applications
Fits:
- 2003 Dodge Ram 2500 5.9L Cummins
- 2003 Dodge Ram 3500 5.9L Cummins
- 2004 Dodge Ram 2500 5.9L Cummins
- 2004 Dodge Ram 3500 5.9L Cummins
- 2005 Dodge Ram 2500 5.9L Cummins
- 2005 Dodge Ram 3500 5.9L Cummins
Does NOT fit:
- 2006–2007 Dodge Ram 5.9L Cummins
Important: Cummins integrated the CCV filter into the valve cover beginning in 2006. On 2006–2007 trucks, the filter is not serviceable separately and replacement requires a complete valve cover assembly.
Important Notes
- Genuine Fleetguard / Cummins replacement filter.
- Includes new O-ring for installation.
- Fits 2003–2005 5.9L Common Rail Cummins only.
- Not compatible with 2006–2007 5.9L Cummins engines.
- Inspect the breather housing for oil buildup during installation.
Common Failure Point
The CCV filter is frequently overlooked because it doesn't typically trigger a warning light or cause an immediate drivability issue.
Instead, it slowly becomes more restrictive over thousands of miles. As crankcase pressure increases, owners may notice oil seepage around engine seals, increased oil residue around the breather, or excessive oil vapor under the hood.
Replacing the CCV filter at regular service intervals helps maintain proper crankcase ventilation and protects engine seals from unnecessary pressure.
Complete Your 5.9L Cummins Maintenance
Keep your 5.9L Cummins running at its best by pairing your new CCV filter with other genuine Fleetguard maintenance components:
- Fleetguard AF4177 Engine Air Filter
- Fleetguard LF16035 Engine Oil Filter
- Fleetguard Fuel Filters
- Glacier Diesel Power Fuel Pressure Test Kits
- Glacier Diesel Power Fuel System Components
- Glacier Diesel Power Performance Air Intake Components
Routine maintenance with genuine Fleetguard filtration helps protect your engine from contaminants, maintain proper crankcase ventilation, and preserve the legendary reliability of the 5.9L Cummins for years to come.