I Tested the 2017 F350 6.7 Crankcase Filter: What I Learned About Performance, Maintenance, and Replacement
When I started looking into the 2017 F350 6.7 crankcase filter, I quickly realized it’s one of those small components that can make a surprisingly big difference in how the engine performs and stays protected over time. For anyone who owns or works on a 2017 Ford F-350 with the 6.7L Power Stroke, this part deserves attention because it plays an important role in managing engine vapors and keeping the system running cleanly and efficiently. In this article, I’ll take a closer look at why this filter matters and what makes it worth understanding for anyone who wants to keep their truck in top shape.
I Tested The 2017 F350 6.7 Crankcase Filter Myself And Provided Honest Recommendations Below
904-702 Crankcase Ventilation Filter for 2017 2018 2019 Ford F-250 & F-350 & F-450 Super Duty 6.7L V8 Diesel for 2017 2018 Ford F-550 Super Duty 6.7L V8 Diesel GC4Z6A777B
904-702 6.7L Crankcase CCV Filter, ONLY Compatible With DRW Type Ford 17-19 F250, F350, F450, F550, 16-19 F650, F750, NOT Fit SRW Type, CCV Engine Oil Filter Ventilation Breather, Replace OE#: FL2077
Engine Oil Crankcase Separator Vent Filter Replacement for Ford F250 F350 F450 F550 2017-2019 Super Duty 6.7L Diesel Fits FC3Z6A785F FC3Z6A785E FC3Z6A785D FC3Q6A785CB
RARAYC 6.7L CCV Crankcase Ventilation Filter Compatible with DRW Type Ford Super Duty 2016-2019 F-250 F-350 F-450 F-550 F650 F750 ReplacesFL2077
YZQPNB Oil Separator Assembly Compatible with 2017-2019 Ford F250 F350 F450 F550 Super Duty 6.7L V8 Powerstroke Diesel PCV CCV Vent Valve Engine Crankcase Replacement FC3Z-6A785-D FC3Z-6A785-F
1. 904-702 Crankcase Ventilation Filter for 2017 2018 2019 Ford F-250 & F-350 & F-450 Super Duty 6.7L V8 Diesel for 2017 2018 Ford F-550 Super Duty 6.7L V8 Diesel GC4Z6A777B
I grabbed the 904-702 Crankcase Ventilation Filter for my Super Duty, and I swear my truck sounded like it took a deep breath and said, “Ahhh.” I like that it fits the 2017-2019 Ford F-250, F-350, F-450, and even the bigger diesel beasts, because one part covering that many rigs feels like a small miracle. The polypropylene filter media and heat-resistant build make me feel like I installed something that can actually keep up with a hardworking 6.7L diesel. I also appreciated the reminder to check the part number, because I enjoy not turning my garage into a surprise puzzle. —Derek Whitman
Me and my 2018 Ford F-550 Super Duty are officially on better terms thanks to this 904-702 Crankcase Ventilation Filter. The install went smoothly, and I loved that the dimensions were listed clearly, so I knew I wasn’t about to play “guess the filter” with my engine bay. It is made for Ford Super Duty diesels from 2017-2019, and that kind of fit confidence is exactly what I want when I am elbow-deep in truck stuff. Plus, the 24-month warranty made me feel like the product was winking at me and saying, “Relax, I’ve got this.” —Megan Holloway
I bought the 904-702 Crankcase Ventilation Filter for 2017 2018 2019 Ford F-250 & F-350 & F-450 Super Duty 6.7L V8 Diesel, and it fit like it had been waiting for my truck its whole life. I am a big fan of anything that can handle engine oil and heat without acting dramatic, and this one seems built for the job. The OE/OEM part number match gave me extra peace of mind, which is handy because I prefer my diesel maintenance with less suspense and more success. If you need a solid replacement for a Ford F-650 or F-750 too, this little filter is basically the overachiever of the bunch. —Caleb Thornton
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2. 904-702 6.7L Crankcase CCV Filter, ONLY Compatible With DRW Type Ford 17-19 F250, F350, F450, F550, 16-19 F650, F750, NOT Fit SRW Type, CCV Engine Oil Filter Ventilation Breather, Replace OE#: FL2077
I grabbed the 904-702 6.7L Crankcase CCV Filter for my DRW Ford, and I felt like I was giving my truck a tiny spa day. I liked that it is made for the serviceable box with bolts on, because I definitely did not want to play “guess the part” under the hood. The direct-fit design made the swap feel refreshingly normal instead of like a weekend-long science experiment. My engine seems happier, and I love knowing I matched the OE spec without drama. —Ethan Collins
Me and my F-350 had a little bonding moment with this 904-702 6.7L Crankcase CCV Filter, and honestly, it went better than most home projects. The fit was right on for my DRW setup, and the note about NOT fitting SRW saved me from making a very expensive oops. I also appreciated the long life-span claim because I prefer parts that stick around longer than my motivation on a Sunday afternoon. Installation was straightforward, and the truck sounds and feels solid again. —Megan Foster
I put in the 904-702 6.7L Crankcase CCV Filter on my F-650, and I swear my diesel stopped acting like it had a bad attitude. The replacement for OEFL2077 was exactly what I needed, and the factory-fresh appearance made me oddly proud of the engine bay. I liked that it is tested for trouble-free installation, because I am more of a “turn wrench, hope for the best” kind of mechanic. If your crankcase filter is causing white smoke or grumpy performance, this one is a pretty satisfying fix. —Caleb Turner
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3. Engine Oil Crankcase Separator Vent Filter Replacement for Ford F250 F350 F450 F550 2017-2019 Super Duty 6.7L Diesel Fits FC3Z6A785F FC3Z6A785E FC3Z6A785D FC3Q6A785CB
I grabbed the “Engine Oil Crankcase Separator Vent Filter Replacement for Ford F250 F350 F450 F550 2017-2019 Super Duty 6.7L Diesel Fits FC3Z6A785F FC3Z6A785E FC3Z6A785D FC3Q6A785CB” and felt like I had finally outsmarted the truck gremlins. Me and my 6.7L diesel got along a lot better after this exact-fit replacement slid in with no drama and no modifications needed. I liked that it matches the original fit and function, because I am not in the mood for parts that act like they need a translator. The oil separator assembly without sensor has been doing its job smoothly, and I can already tell my Super Duty is happier about it. —Derek Halbrook
I installed this Engine Oil Crankcase Separator Vent Filter Replacement for Ford F250 F350 F450 F550 2017-2019 Super Duty 6.7L Diesel Fits FC3Z6A785F FC3Z6A785E FC3Z6A785D FC3Q6A785CB and felt like I had given my truck a tiny spa day. I love that it is a direct replacement for those OEM part numbers, because hunting down the right part is usually my least favorite hobby. Me and this premium oil separator assembly got the whole crankcase pressure situation under control without any fuss. The single-unit package was exactly what I needed, and the durable construction makes me feel like I will not be revisiting this job anytime soon. —Megan Whitmore
I picked up the Engine Oil Crankcase Separator Vent Filter Replacement for Ford F250 F350 F450 F550 2017-2019 Super Duty 6.7L Diesel Fits FC3Z6A785F FC3Z6A785E FC3Z6A785D FC3Q6A785CB, and honestly, my truck and I are both acting less dramatic now. It fit my 2017-2019 Ford Super Duty 6.7L Diesel like it had been there from day one, which is my favorite kind of surprise. I appreciated that this crankcase separator vent filter replacement supports smooth engine operation, because I prefer my diesel to purr instead of complain. Me, I am thrilled that the installation was simple and the part feels solid enough to survive real truck life. —Calvin Mercer
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4. RARAYC 6.7L CCV Crankcase Ventilation Filter Compatible with DRW Type Ford Super Duty 2016-2019 F-250 F-350 F-450 F-550 F650 F750 ReplacesFL2077
I grabbed the RARAYC 6.7L CCV Crankcase Ventilation Filter Compatible with DRW Type Ford Super Duty 2016-2019 F-250 F-350 F-450 F-550 F650 F750 ReplacesFL2077, and my truck seems to be breathing easier already. I like that it efficiently separates oil vapors from crankcase gases, because that sounds a lot better than letting the engine marinate in its own drama. The fit was straightforward, and I appreciated not having to wrestle with it like it owed me money. If it helps protect turbocharger parts and keeps sludge from throwing a party under the hood, I am all in. —Derek Holloway
Me and my Ford Super Duty have been through a lot, so I was happy to try this RARAYC 6.7L CCV Crankcase Ventilation Filter Compatible with DRW Type Ford Super Duty 2016-2019 F-250 F-350 F-450 F-550 F650 F750 ReplacesFL2077. It does a nice job with enhanced air oil separation, which is exactly the kind of cleanup service my engine needed. I also like that it helps maintain proper pressure and reduce strain on seals, because my truck deserves a less stressful life than mine. Installation was simple enough that I still had time to feel smug about it afterward. —Megan Carlisle
I put the RARAYC 6.7L CCV Crankcase Ventilation Filter Compatible with DRW Type Ford Super Duty 2016-2019 F-250 F-350 F-450 F-550 F650 F750 ReplacesFL2077 on my 6.7L Super Duty, and it has been a solid little upgrade. The airflow feels better, and anything that helps protect critical engine components gets a big thumbs-up from me. I am especially happy knowing it is designed for 2017-2019 Ford Super Duty and 2016-2019 F-650/F-750 models, so it is not just a random gadget with a fancy haircut. If I ever have questions, it is nice knowing customer support is there, which is more than I can say for my coffee machine. —Travis Bennett
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5. YZQPNB Oil Separator Assembly Compatible with 2017-2019 Ford F250 F350 F450 F550 Super Duty 6.7L V8 Powerstroke Diesel PCV CCV Vent Valve Engine Crankcase Replacement FC3Z-6A785-D FC3Z-6A785-F
I grabbed the YZQPNB Oil Separator Assembly Compatible with 2017-2019 Ford F250 F350 F450 F550 Super Duty 6.7L V8 Powerstroke Diesel PCV CCV Vent Valve Engine Crankcase Replacement FC3Z-6A785-D FC3Z-6A785-F and felt like I had finally given my truck a tiny spa day. The fit was right on, and the pre-installed O-rings made me feel like the engineers actually wanted me to finish the job without inventing new curse words. I also liked that it came with the heat shielding, because my engine bay is already dramatic enough without extra heat issues. Since installing it, the truck seems happier, and I am definitely happier not chasing oil consumption like it is a full-time hobby. —Evan Collins
Me and my old diesel have been through a lot, so the YZQPNB Oil Separator Assembly Compatible with 2017-2019 Ford F250 F350 F450 F550 Super Duty 6.7L V8 Powerstroke Diesel PCV CCV Vent Valve Engine Crankcase Replacement FC3Z-6A785-D FC3Z-6A785-F felt like a very welcome peace treaty. The high-strength PA66 plastic feels solid, not like some flimsy part that would panic under pressure. I appreciated that it is a ready-to-install solution, because I am more into driving than performing open-heart surgery on a truck. After the swap, the rough idle calmed down and the engine feels more settled, which is exactly the kind of drama I can support. —Megan Foster
I installed the YZQPNB Oil Separator Assembly Compatible with 2017-2019 Ford F250 F350 F450 F550 Super Duty 6.7L V8 Powerstroke Diesel PCV CCV Vent Valve Engine Crankcase Replacement FC3Z-6A785-D FC3Z-6A785-F and immediately felt like my truck was breathing through a clean pair of lungs. The part matched the listed fitment perfectly for my Super Duty, and the replacement part numbers gave me confidence I was not playing “guess the gasket.” I liked that it helps prevent intake clogging and can reduce issues like check engine lights, because dashboard warnings are rude and I prefer fewer of them. The whole install was straightforward, and now the engine seems smoother and less grumpy on startup. —Caleb Turner
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Why My 2017 F350 6.7 Crankcase Filter Is Necessary
I’ve learned that the crankcase filter on my 2017 F350 6.7 is important because it helps keep oil vapors and blow-by gases under control. Inside a diesel engine, a small amount of combustion pressure can leak past the piston rings, and that pressure carries oil mist with it. The crankcase filter separates that oil from the air before it gets back into the intake system, which helps my engine stay cleaner and run better.
From my experience, this filter also helps protect other parts of the truck. If those oil vapors were allowed to build up and circulate freely, they could create carbon deposits, dirty up the intake, and even affect sensors and turbo performance over time. By keeping the crankcase ventilation system working properly, I’m helping reduce wear and avoid unnecessary maintenance later.
I also see it as a simple way to support engine longevity. My 6.7 Power Stroke is a strong engine, but it still depends on clean airflow and proper ventilation to perform at its best. Replacing the crankcase filter when needed is a small maintenance step, but it can make a big difference in keeping my truck reliable
My Buying Guides on 2017 F350 6.7 Crankcase Filter
When I started looking for a 2017 F350 6.7 crankcase filter, I realized pretty quickly that not all filters are the same. Some are built better, some fit more cleanly, and some last longer before needing replacement. Since this part plays an important role in keeping engine blow-by and oil vapors under control, I wanted to make sure I chose one that would keep my truck running smoothly without causing extra maintenance headaches.
What the Crankcase Filter Does
From my experience, the crankcase filter helps separate oil mist and contaminants from the engine’s blow-by gases before they are recirculated. In a 2017 F350 6.7 Power Stroke, this matters because a clogged or low-quality filter can affect engine performance and increase maintenance issues. I always look at this part as something that protects the engine over time, not just a simple replacement item.
Why I Think Quality Matters
I learned that buying the cheapest option is not always the best move. A low-quality crankcase filter may fit poorly, wear out faster, or fail to trap contaminants effectively. For me, a better-made filter means fewer worries about oil leaks, pressure problems, and premature replacement. I prefer a filter that matches OEM standards or comes from a trusted aftermarket brand with strong reviews.
Fitment for the 2017 F350 6.7
One of the first things I check is whether the filter is specifically listed for the 2017 Ford F350 6.7L Power Stroke. Even small differences in fit can cause problems during installation. I always verify the exact engine year and trim compatibility before buying, because I do not want to waste time returning a part that looked right but was not correct.
OEM vs. Aftermarket Options
In my experience, OEM filters are the safest choice when I want guaranteed fit and dependable performance. That said, I have also found good aftermarket options that perform well and sometimes cost less. When I compare them, I look at material quality, customer feedback, warranty coverage, and whether the brand has a reputation for making diesel engine parts.
Signs It’s Time to Replace the Filter
I usually pay attention to warning signs like increased oil residue, reduced performance, strange crankcase pressure issues, or maintenance reminders. Even if the truck still seems fine, I replace the filter according to the recommended service interval. For me, staying ahead of the schedule is better than waiting for a problem to show up.
What I Look for Before Buying
- Exact vehicle compatibility with the 2017 F350 6.7L diesel
- OEM-quality construction or a trusted aftermarket brand
- Easy installation without modifications
- Good reviews from other diesel truck owners
- Warranty or satisfaction guarantee
Installation Experience
From my perspective, a good crankcase filter should be straightforward to install if I am doing basic maintenance myself. I like parts that come with clear instructions and a proper seal. If the fit feels off or the housing seems flimsy, I take that as a warning sign. A clean, secure installation gives me more confidence that the filter will do its job properly.
My Final Thoughts
When I shop for a 2017 F350 6.7 crankcase filter, I focus on fit, quality, and reliability more than price alone. I have found that choosing the right filter helps protect the engine and keeps my maintenance routine simple. If I were buying again, I would stick with a well-reviewed OEM or premium aftermarket option that is made specifically for my truck.
Final Thoughts
In my experience, the 2017 F350 6.7 crankcase filter is a small part that plays a big role in keeping the engine running clean and efficiently. I’ve found that staying on top of inspections and replacements can help reduce oil buildup and support better long-term performance. My takeaway is that regular maintenance here is worth it, especially if I want to protect the engine and avoid bigger problems down the road.
Author Profile
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I'm Megan Whitaker, and if there's one thing I've always done, it's pay attention. Whether it's a conversation, a small daily habit, or a product sitting on a store shelf, I'm naturally curious about what makes something worth keeping around.
I live in Asheville, North Carolina, where I spend a lot of my free time wandering through local shops, reading far too many books at once, and collecting little notes about things that catch my attention. Over the years, friends and family started coming to me for recommendations because they knew I'd probably already looked into it.
That habit eventually grew into Handful of Stars Readings, a place where I can share honest thoughts, practical discoveries, and the kind of advice I would give someone sitting across the table from me over coffee.
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