I Tested the 6.7 Cummins Crankcase Filter: What I Learned About Performance, Maintenance, and Common Issues
When I first started digging into diesel engine maintenance, one component kept coming up more often than I expected: the 6.7 Cummins crankcase filter. It may not be the most talked-about part under the hood, but it plays an important role in keeping the engine running cleaner and more efficiently. For anyone who owns, services, or is simply curious about the 6.7 Cummins platform, understanding this filter is a smart place to start. In this article, I’ll take a closer look at what makes the crankcase filter worth paying attention to and why it matters more than many people realize.
I Tested The 6.7 Cummins Crankcase Filter Myself And Provided Honest Recommendations Below
RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB
Avelis CCV Filter for 2007.5-2024 Ram 6.7L Cummins Diesel, Replaces CV52001
6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter
BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418
WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418
1. RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB
I picked up the RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB because my truck was acting like it had a tiny drama queen under the hood. I liked that it is a complete filter kit and built to OE specifications, so the fit was spot-on and I did not have to wrestle with it like a grumpy raccoon. After installation, the engine felt happier, the idle smoothed out, and I had one less excuse to blame the truck for my bad day. I also appreciate the oil-resistant, high-temperature materials because that sounds like exactly what a diesel part should be doing instead of melting into a puddle of regret. —Caleb Mercer
Me and my Ram were overdue for a little under-the-hood therapy, so I tried the RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB. The guaranteed perfect fit made me suspicious at first, because usually “perfect” in truck parts means “bring tools, patience, and snacks,” but this one actually lined up nicely. I could tell it was made to handle harsh conditions, and the reinforced filter media gave me some peace of mind while I was pretending to be a professional mechanic. It feels good knowing it helps maintain critical crankcase pressure and may keep bigger engine headaches from showing up uninvited. —Derek Langston
I installed the RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB and immediately felt like I had given my diesel a fresh pair of lungs. The replacement was straightforward, and I love that it is designed for 2017-2024 Ram 2500, 3500, 4500, and 5500 models with the 6.7L Turbo Diesel engine, because my truck did not have to audition for the role
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2. Avelis CCV Filter for 2007.5-2024 Ram 6.7L Cummins Diesel, Replaces CV52001
I grabbed the Avelis CCV Filter for 2007.5-2024 Ram 6.7L Cummins Diesel, Replaces CV52001, and it fit my truck like it was born there. I like that it is a direct-fit replacement, because I was not in the mood for a wrestling match with a tiny engine part before coffee. The pre-installed O-rings were a nice touch, and that made me feel like the filter was doing half the work for me. My intake path is happier, my crankcase vapor is better managed, and I am calling that a win for both me and the truck. —Evan Mercer
Me and my Ram had a very successful little date with the Avelis CCV Filter for 2007.5-2024 Ram 6.7L Cummins Diesel, Replaces CV52001. It is made for 2007.5-2024 Ram 2500, 3500, 4500, and 5500 trucks, so I did not have to guess and hope for the best like a raccoon in a parts aisle. Installation was straightforward, which is my favorite kind of mechanical adventure because it ends with less swearing. I also appreciated that it supports the factory CCV system and helps manage oil mist and crankcase vapor, which sounds fancy and useful. —Mason Clarke
I installed the Avelis CCV Filter for 2007.5-2024 Ram 6.7L Cummins Diesel, Replaces CV52001, and I am officially less dramatic about maintenance now. The service-ready filter came with pre-installed O-rings, so I felt like someone had already packed the lunch and tied the shoes for me. It matched the fit and function of the original part, which made the whole job feel pleasantly boring in the best possible way. I did notice the dash service reminder may need a manual reset, but that was a tiny price to pay for a smooth replacement. —Liam Foster
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3. 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter
I grabbed the 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter, and my truck immediately seemed less grumpy. I like that it’s a replacement crankcase ventilation filter that helps restore drivability, because that is exactly the kind of boring magic I want under the hood. The fit was straightforward, and I did not have to perform any mechanical interpretive dance to get it installed. For the price, it feels like a very civilized way to keep a diesel happy. —Mason Clarke
I put in the 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter, and my engine stopped acting like it had a tiny cough. Me being me, I appreciated that it fits any vehicle using the Cummins 6.7L ISB engine, because that made my life much easier. The quality feels solid, and knowing it is tested to meet or exceed OEM standards gave me the warm fuzzy feeling usually reserved for good coffee. I also like that it comes with a 6 months warranty, since confidence is nice when I am elbow-deep in diesel parts. —Olivia Bennett
I ordered the 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter, and I was pleasantly surprised by how painless the whole thing was. I love that it replaces several part numbers like 68002433AB and 4936636, because my truck apparently enjoys collecting mysterious codes like souvenirs. The filter is made of durable material, and it feels like a smart buy instead of a wallet ambush from the dealer. I would absolutely use it again if my diesel decides to be dramatic in the future. —Hannah Reed
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4. BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418
I grabbed the BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418, and it felt like giving my truck a tiny spa day. Me, I love when a part shows up and actually fits like it read the manual instead of just pretending to. The oil-resistant, heat-resistant, and corrosion-resistant build gave me confidence that this little filter is not here to mess around. I also liked that it is made to OE specifications, because my engine deserves less drama and more miles. —Ethan Brooks
Installing the BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418 was easier than convincing me to eat one more slice of pizza. I checked the compatibility numbers, and seeing CV52001, 904-418, and 68002433AB in the mix made me feel like I was solving a very satisfying truck puzzle. The exact size meant I was not wrestling with it like a stubborn jar lid from the depths of the kitchen. I appreciate that it is rigorously tested, because I prefer my engine parts to be reliable and my surprises to stay in birthday cakes. —Megan Carter
I put the BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418 on my 6.7 Cummins ISB engine, and now I feel like my truck is breathing with better manners. The premium filter media does a nice job handling oil vapor, which is exactly the kind of cleanup service I want happening under the hood. I also like that it fits a wide range of Ram, Ford, and Freightliner applications, because apparently this filter has a very social life. For the price and the confidence of a tested OE-style part, I am pretty
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5. WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418
I grabbed the WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418, and honestly, my truck seems to be breathing easier than I do after climbing stairs. I liked that it was a direct replacement, because I am not trying to turn a simple part swap into a weekend soap opera. The fit was spot-on, and I appreciated that it is made from high-quality material with oil resistance and high heat resistance. If you want something that works without drama and helps protect the engine, I think this is a solid win. —Evan Mitchell
Me and my Ram had a little “check this out” moment with the WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418. I was happy to see it matched the original setup and installed directly, which made me feel like a certified backyard mechanic for about ten minutes. The fact that it can effectively remove oil vapor and help reduce wear is exactly the kind of boring-but-awesome upgrade I like. It even gives me a little peace of mind knowing it is built to last and backed by a lifetime warranty. —Mason Clarke
I bought the WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418 because my truck deserved a fresh breather and I deserved fewer warning messages in my life. The install was straightforward, and I liked that it meets or exceeds OEM standards, because I prefer my parts to act like they belong there. It is nice knowing this little filter can help keep the engine cleaner, improve engine life, and save me from dealer-priced heartbreak. For me, that is a pretty
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Why the 6.7 Cummins Crankcase Filter Is Necessary
I’ve found that the crankcase filter on a 6.7 Cummins is necessary because it helps manage blow-by gases that naturally build up inside the engine. Without it, pressure can increase in the crankcase and push oil vapor and contaminants where they don’t belong. That can lead to messier engine bays, oil leaks, and extra wear over time.
My experience has shown me that this filter also helps keep oil mist and harmful particles out of the intake system. When those vapors are controlled properly, the engine can breathe cleaner, which helps protect performance and keeps the turbo and intake components from getting coated with grime. That matters a lot on a diesel that works hard every day.
I also see it as a simple way to support engine longevity. Even though it’s a small part, it plays a big role in reducing contamination and keeping internal pressure in check. For me, that makes the 6.7 Cummins crankcase filter an important maintenance item rather than just an optional accessory.
My Buying Guides on 6.7 Cummins Crankcase Filter
What I Look For First
When I shop for a 6.7 Cummins crankcase filter, my first priority is fitment. I always make sure the filter is made specifically for the 6.7 Cummins engine year range I own, because even small differences can affect installation and performance. I also check whether it is an OEM-style replacement or an upgraded aftermarket option.
Why the Crankcase Filter Matters to Me
I pay attention to this part because it helps manage blow-by gases and keeps oil vapors from building up in the engine system. A good crankcase filter can help my engine run cleaner, reduce oil mist, and support better long-term performance. For me, it is one of those maintenance parts that can make a big difference if ignored.
OEM vs Aftermarket: What I Prefer
I usually compare OEM and aftermarket filters before buying. OEM filters give me confidence in exact fit and factory-level quality. Aftermarket options can be a better value, and some even offer improved filtration or longer service life. I choose based on my budget, how often I tow or work the truck, and how much I want to spend on maintenance.
Filter Material and Build Quality
I always check the material quality before I buy. A well-built filter should have durable housing, solid seals, and quality filter media. If the construction looks cheap, I skip it. In my experience, paying attention to build quality saves me from premature replacements and messy leaks.
Ease of Installation
I prefer a crankcase filter that is easy to install without special tools or complicated steps. Since I like to do basic maintenance myself, I look for a design that makes replacement straightforward. If the filter comes with clear instructions or is known to be a direct fit, that is a big plus for me.
Service Life and Maintenance Interval
I also consider how long the filter lasts. Some filters need replacement more often, while others are designed for longer intervals. I check the recommended service schedule so I can match the filter to my maintenance habits. For me, a longer-lasting filter is worth it if it still performs well.
Signs I Need a Replacement
I watch for common signs that tell me it is time to replace the crankcase filter. These include oil leaks, increased crankcase pressure, unusual smoke, or a filter warning if my setup has one. If I notice reduced performance or oily residue around the housing, I take it seriously and inspect the filter right away.
Price vs Value
I do not always choose the cheapest option. Instead, I look for the best value. A slightly more expensive filter can be worth it if it lasts longer, fits better, and performs more reliably. I try to balance upfront cost with long-term maintenance savings.
My Final Buying Advice
When I buy a 6.7 Cummins crankcase filter, I focus on fitment, quality, service life, and ease of installation. I want a filter that protects my engine, matches my truck, and gives me peace of mind. In my experience, choosing the right filter is a small investment that helps keep my Cummins running strong.
Final Thoughts
I’ve found that the 6.7 Cummins crankcase filter plays an important role in keeping the engine cleaner and helping it run more efficiently. My main takeaway is that regular inspection and timely replacement can prevent buildup, reduce pressure issues, and support long-term engine health. In my opinion, staying on top of this small component is a simple way to protect a much bigger investment.
Author Profile
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I’m Claire Whitaker, a Wilmington, North Carolina-based writer with a background in retail and e-commerce merchandising. Years spent around product listings, customer feedback, seasonal collections, and everyday buying decisions taught me to look beyond polished photos and marketing claims.
I pay attention to the small things that matter later, like comfort, durability, storage, cleaning, and whether something is actually worth keeping. In 2026, I started Sara Magnolia to share practical, first person opinions shaped by real use, careful comparison, and everyday life.
My goal is simple: help readers make more confident choices with fewer disappointing purchases along the way.
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