Mopar CCV Filters for RAM 6.7 Cummins – Why They Matter
Modern diesel engines like the RAM 6.7L Cummins are engineered for durability, torque, and long service life - but only when key filtration components are properly maintained. One of the most overlooked yet critical parts is the Mopar CCV filter, an essential element of the engine’s crankcase ventilation system.
Ignoring CCV maintenance can lead to oil contamination, excessive crankcase pressure, turbocharger issues, and premature engine wear. This guide explains what Mopar CCV filters do, why they matter, how often they should be replaced, and what happens if they’re neglected.
What Is a CCV Filter on a 6.7 Cummins?
The CCV (Crankcase Ventilation) filter - also known as a crankcase breather filter or engine breather filter—is designed to capture oil mist and combustion blow-by gases produced during normal engine operation.
In the 6.7 Cummins crankcase ventilation system, gases that escape past piston rings are routed out of the crankcase. The CCV filter:
- Separates oil vapors from gases
- Prevents oil mist from entering the intake system
- Maintains proper crankcase pressure
Without a properly functioning crankcase ventilation filter, contaminants can circulate back into the engine, accelerating wear on seals, turbo components, and intake parts.
Why Mopar CCV Filters Are Different
Mopar CCV filters are engineered specifically for Cummins diesel tolerances. Unlike generic aftermarket alternatives, OEM Mopar filters are designed to match factory airflow, pressure requirements, and oil separation efficiency.
Key advantages include:
- Correct filtration density for oil mist separation
- Balanced airflow to prevent crankcase pressure buildup
- Exact fitment for RAM 2500 and RAM 3500 trucks
- Compatibility with factory service intervals
Aftermarket CCV filters may restrict airflow or fail to capture oil vapors effectively, which can lead to higher oil consumption and turbo contamination.
How Often Should You Change a CCV Filter on a 6.7 Cummins?
Mopar recommends replacing the CCV filter 6.7 Cummins around 67,500 miles under normal driving conditions. However, real-world usage often demands more frequent replacement.
You should consider changing your CCV filter RAM 2500 / RAM 3500 sooner if you:
- Tow heavy loads regularly
- Drive in hot or dusty environments
- Idle for long periods
- Notice oil residue near the CCV housing
Many diesel owners proactively replace the CCV filter every 40,000–50,000 miles for added engine protection.
What Happens If You Don’t Change Your CCV Filter?
A clogged or oil-saturated CCV filter can cause:
- Excess crankcase pressure
- Oil leaks from seals and gaskets
- Turbocharger oil contamination
- Reduced engine efficiency
- Accelerated soot buildup
Over time, these issues can result in costly repairs—far more expensive than routine CCV filter replacement.
Can You Run a 6.7 Cummins Without a CCV Filter?
While the engine may technically run, operating without a CCV filter is strongly discouraged. The CCV system is designed to regulate crankcase pressure and prevent oil vapor contamination.
Without a crankcase breather filter, you risk:
- Oil mist coating intake components
- Increased emissions-related issues
- Shortened turbocharger lifespan
- Crankcase pressure imbalance
Symptoms of a Bad CCV Filter
What are the symptoms of a bad CCV filter?
Common warning signs include:
- Oil residue around the CCV housing
- Increased oil consumption
- Whistling or hissing sounds
- Rough idle or reduced performance
- Oil found in intake piping
If you notice these symptoms on a 2019 RAM 2500 CCV filter or 2020 RAM 2500 CCV filter, replacement should be done promptly.
Does a CCV Filter Affect Fuel Economy?
While a CCV filter won’t dramatically increase fuel economy, a clean CCV system supports optimal airflow and combustion efficiency. A clogged filter can negatively affect performance and contribute to reduced efficiency.
How Much Does It Cost to Replace a CCV Filter?
Replacing a Mopar CCV filter is relatively inexpensive compared to major engine repairs. Costs typically include:
- OEM Mopar CCV filter
- Minimal labor (often DIY-friendly)
Considering the protection it provides, CCV filter replacement is one of the most cost-effective maintenance tasks for a 6.7 Cummins engine.
CCV Filters and Complete Engine Filtration
The CCV filter works best when maintained alongside other essential filters, including:
- Mopar oil filters
- 2013 RAM 2500 fuel filter and 2013 RAM 3500 fuel filter systems
- 2021 RAM 2500 Cummins fuel filter setups
Together, these components form a complete engine protection strategy that minimizes wear and extends engine life.
Final Thoughts
The Mopar CCV filter is a critical but often overlooked component of the RAM 6.7 Cummins engine. Proper maintenance helps prevent oil contamination, pressure imbalance, and premature engine wear.
If you want long-term reliability from your RAM 2500 or 3500, CCV filter maintenance is not optional—it’s essential.
