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CCV Filter 6.7 Cummins Problems: Symptoms and Replacement Guide
If you own a 2010-2018 6.7L Cummins-powered Ram, that small but critical component under your hood—the CCV filter 6.7 Cummins—could be the source of some big headaches. Officially called the Crankcase Ventilation Filter, this often-overlooked part is central to your engine’s health. A clogged or failing crankcase ventilation filter 6.7 Cummins can lead to a cascade of issues, from annoying oil leaks to serious performance problems.
This comprehensive guide will walk you through everything you need to know: how to spot the CCV filter Cummins 6.7 problems, the step-by-step process to replace it, and why the smartest long-term solution might be to upgrade your entire crankcase ventilation system. Plus, as we roll into the new year, we’re making it easier than ever to give your truck the upgrade it deserves. Let’s dive in and get your Cummins breathing easy again for 2026.
What is the CCV Filter and Why Does It Matter?
The Engine’s Built-in Air Purifier
Think of the CCV filter 6.7 Cummins as a specialized air filter for your crankcase. Its job is critical:
- Vent Blow-by Gases: It allows harmful combustion gases (blow-by) that slip past the piston rings to escape the crankcase.
- Trap Oil Mist: It separates and captures oil vapors from these gases before they are recirculated.
- Protect the Turbo and Intake: By filtering out oil, it prevents coking and carbon buildup in your turbocharger and intake system.
When this filter gets clogged—a common issue known as CCV filter Cummins 6.7 problems—it can’t perform these jobs. The result is excessive crankcase pressure, which seeks the path of least resistance, often forcing oil out of engine seals and gaskets.
Top Symptoms of a Failing CCV Filter
Don’t ignore these warning signs. Catching crankcase ventilation filter 6.7 Cummins issues early can prevent more expensive damage.
1. Excessive Oil Consumption and Leaks
This is the most classic sign. If your Ram is suddenly needing a quart of oil between changes or you see fresh leaks around the:
- Valve covers
- Front crankshaft seal
- Rear main seal
- Oil pan gasket
A clogged CCV filter creating high crankcase pressure is the prime suspect.
2. Oil in the Intake or Intercooler Pipes
When the filter fails, oil vapor is forced directly into the intake stream. Check the intake piping and intercooler boots for a film of oil. This oil can coat sensors, reduce intercooler efficiency, and contribute to carbon deposits.
3. Whistling or Hissing from the Oil Fill Cap
With the engine running, carefully remove the oil fill cap. If you hear a strong suction (a vacuum) or a loud hissing/whistling sound (positive pressure), it indicates the CCV system is not venting properly, pointing directly to a filter or system restriction.
4. Reduced Engine Performance and Rough Idle
Excessive crankcase pressure can upset the engine’s internal balance and, if severe enough, can even affect piston ring sealing. You might notice a slight loss of power, poorer fuel economy, or a rougher-than-usual idle.
5. The “Oil-Filled” CCV Filter Housing
During inspection, if you find the CCV filter housing itself is full of liquid oil instead of just a moist filter, it’s a definitive sign the filter is completely saturated and blocked, unable to separate the oil from the gases.
Step-by-Step: Replacing Your 6.7 Cummins CCV Filter
Replacing the filter is a straightforward DIY job. Here’s how to tackle these common CCV filter Cummins 6.7 problems yourself.
Tools You’ll Need:
- Replacement CCV filter (OEM or high-quality aftermarket)
- Flat-head screwdriver or trim tool
- Socket set (typically 8mm for housing bolts)
- Shop towels
- New housing gasket (recommended)
- Safety glasses
The Replacement Process:
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Locate and Access: The CCV filter housing is on the driver’s side of the engine, towards the front, near the valve cover. You may need to remove the engine cover for clear access.
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Disconnect the Hoses: Carefully loosen the clamps and disconnect the two large hoses from the filter housing.
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Remove the Housing: Unbolt the housing from the cylinder head (usually two 8mm bolts). Gently pry it loose.
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Inspect and Clean: Remove the old filter. This is the perfect time to inspect the condition—is it soaked, caked with debris? Thoroughly clean the housing interior with a shop towel and brake cleaner.
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Install the New Filter: Place the new filter into the housing. It should fit snugly. Replace the housing gasket.
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Reassemble: Bolt the housing back onto the cylinder head. Reconnect the hoses and tighten the clamps securely.
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Check Oil Level: It’s a good practice to check your engine oil level after the job, as some oil may have been lost during the process.
Pro Tip: Consider this a routine maintenance item. For trucks driven in severe conditions (lots of idling, short trips, towing), check the filter every 15,000-20,000 miles.
The Permanent Solution: Upgrade with an EGR & CCV Delete Kit
While replacing the paper filter fixes the immediate symptom, it doesn’t address the root cause of the design’s limitations. The factory Closed Crankcase Ventilation (CCV) system is a closed loop—it reroutes oily vapors back into your intake to be burned. This is the core reason for CCV filter 6.7 Cummins problems.
A far superior approach is converting to an open or rerouted system with a complete EGR & CCV Delete Kit. This isn’t just a filter change; it’s a system overhaul that delivers multiple benefits and is our recommended fix for persistent crankcase ventilation filter 6.7 Cummins headaches.
Why an Upgrade Kit is the Smart Choice:
- Eliminates the Filter Entirely: No more clogs, no more replacements, no more oil leaks from pressure.
- Stops Intake Oil Contamination: Vapors are vented to the atmosphere (via a filter) or rerouted, keeping your turbo, intercooler, and intake manifold clean.
- Reduces Carbon Buildup: Works hand-in-hand with EGR deletion to dramatically reduce soot and carbon deposits in your intake system, improving longevity.
- Improves Engine “Breathe-ability”: Maintains optimal crankcase pressure for better piston ring sealing and overall engine efficiency.
Featured Solutions: Your Path to a Healthier Cummins
Forget band-aid fixes. These complete kits solve the CCV filter Cummins 6.7 problems at their source and unlock better performance. And what better time to invest in your truck’s health than at the start of a new year?
1. 2010-2018 6.7L Dodge Ram Cummins EGR Delete & CCV Crankcase Ventilation Kit
This comprehensive kit is the ultimate solution for first-generation 6.7L owners. It addresses the two biggest sources of intake contamination and performance loss in one package.
- Completely deletes the problematic EGR system, preventing soot recirculation.
- Replaces the restrictive factory CCV system with a high-flow, rerouted ventilation setup.
- Includes all necessary block-off plates, billet fittings, and heavy-duty hosing for a professional, leak-free installation.
- Result: A cleaner engine, reduced maintenance, and restored power and throttle response.
2. 2013-2018 6.7L Ram Cummins EGR Delete & CCV Crankcase Ventilation Kit
Tailored for the updated 2013+ models, this kit offers the same comprehensive benefits with precise fitment for the later engine architecture.
- Precision-engineered components ensure perfect alignment and an OEM-quality fit.
- Promotes optimal crankcase vacuum, improving engine efficiency and reducing the chance of any future oil seepage.
- Simplifies your engine bay by removing complex factory piping, making future work easier.
- Result: A permanent end to oil consumption issues and a foundation for enhanced reliability.
Ring in 2026 with Power & Savings!
Tired of chasing oil leaks and replacing filters? Make 2026 the year your Cummins runs its best. For a limited time, kick off the new year right by giving your truck the upgrade it needs.
From December 29, 2025, to January 4, 2026, take advantage of our New Year’s Power-Up Sale! Get 15% OFF your entire order of performance parts, including the EGR & CCV kits featured above, with discount code:TTK2026
This is a special, one-time-use code per customer for the promotion period. It’s our way of helping you start the new year with more power, less maintenance, and more money in your pocket. Don’t miss out—this offer disappears when the clock strikes midnight on January 4th!
Conclusion: Stop Filtering Problems, Start Solving Them
Dealing with CCV filter 6.7 Cummins problems is a common rite of passage for Ram owners, but it doesn’t have to be a recurring nightmare. While swapping the filter provides temporary relief, upgrading to a complete EGR & CCV delete system is the definitive cure. It transforms a maintenance headache into a performance and reliability benefit.
As we close out the year and look ahead to 2026, there’s no better resolution than committing to your truck’s peak performance. Visit www.trucktok.com now to explore our full range of Cummins performance solutions. Use your exclusive code TTK2026 at checkout to unlock 15% off and drive into the new year with confidence, power, and a cleaner, happier engine.
FAQs About Cummins CCV Filters & Upgrades
Q1: How often should I replace my 6.7 Cummins CCV filter?
A1: Dodge’s official maintenance schedule often doesn’t list a specific interval, but based on common CCV filter Cummins 6.7 problems, most experts and owners recommend inspecting it every 15,000-20,000 miles and replacing it as soon as it shows signs of saturation or clogging.
Q2: Can a bad CCV filter cause white smoke?
A2: Yes, but indirectly. A severely clogged crankcase ventilation filter 6.7 Cummins can cause such high pressure that it forces oil past turbocharger seals into the intake or exhaust. This burning oil can manifest as blueish-white smoke from the exhaust, especially under acceleration.
Q3: Is it legal to install an EGR & CCV delete kit?
A3: It is crucial to check your local and state laws. In the United States, tampering with or removing emissions control equipment (including the EGR system) is prohibited for vehicles driven on public roads under federal law. These kits are intended for off-road or competition use only where permitted.
Q4: Will an EGR/CCV delete kit improve my fuel mileage?
A4: Many users report modest fuel economy improvements (1-3 MPG) after installation. This is due to reduced engine pumping losses from a free-breathing crankcase, cleaner intake air (without EGR soot), and more efficient combustion. Results can vary based on driving style and tuning.
Q5: Do I need a custom tune after installing one of these kits?
A5: For the EGR delete portion, yes, a custom tune is highly recommended and often required to properly turn off the EGR system in the engine computer, prevent check engine lights, and optimize performance. The CCV reroute portion is a purely mechanical modification and does not require tuning.