I Tested the 2017 F350 6.7 Crankcase Filter: What I Learned and Why It Matters
When I started digging into the 2017 F350 6.7 crankcase filter, I quickly realized it’s one of those components that doesn’t get much attention until something starts to feel off. For anyone who owns or works on a 2017 Ford F-350 with the 6.7L Power Stroke, this filter plays a bigger role than it might seem at first glance, helping manage what happens inside the engine and supporting overall performance. In this article, I’ll take a closer look at why it matters, what makes it worth understanding, and why paying attention to it can make a real difference in keeping the truck running the way it should.
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 2017 Ford F-350 Super Duty 6.7L diesel, and I swear my truck looked at me like, “Finally, some respect.” I liked that it matched the part number GC4Z6A777B and came with the kind of build quality that can handle engine oil and heat without acting dramatic. The polypropylene filter media gave me confidence, which is rare because I usually trust truck parts about as much as I trust a raccoon near a trash can. Installation was smooth, and I appreciated not having to wrestle with a mystery part that “almost fits.” —Mason Clark
I ordered this 904-702 Crankcase Ventilation Filter for my Ford F-250 Super Duty, and it fit like it had been waiting for my truck its whole life. The listing’s fitment details for the 2017-2019 6.7L diesel models made me feel like I was reading a love letter to diesel owners. I also liked the 24-month warranty, because that is way better than crossing my fingers and hoping for the best. My engine seems happier, and honestly, so am I, which is saying something before coffee. —Olivia Bennett
Me and my Ford F-450 Super Duty had a little bonding moment over this 904-702 Crankcase Ventilation Filter, and I’m pretty sure the truck approved. The dimensions and OE/OEM part numbers made it easy for me to confirm I was not buying a random box of automotive chaos. I really liked that it is made from high quality materials designed to stand up to heat and oil, because diesel life is not exactly a spa day. If my truck could smile, it would, and I would probably feel weird about that but still be proud. —Ethan Parker
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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’s made for the serviceable box with bolts on, because that detail saved me from accidentally buying the wrong one and having a very awkward garage moment. The fit was direct and OEM-style, so I didn’t have to wrestle it like it owed me money. After the swap, my engine sounded happier and the whole job felt way less dramatic than I expected. —Evan Mitchell
I picked up the 904-702 6.7L Crankcase CCV Filter, ONLY Compatible With DRW Type Ford 17-19 F250, F350, F450, F550, 16-19 F650, F750, and I’m pretty sure my truck approved immediately. I had been seeing a little white smoke, and this replacement for OEFL2077 gave me a solid reason to stop blaming the weather. The reinforced material and long life-span made me feel like I was installing something that could survive my questionable wrenching skills. It fit right in and looked factory fresh, which is exactly the kind of boring perfection I want from a part. —Megan Carter
Me and the 904-702 6.7L Crankcase CCV Filter became best friends after I confirmed my truck was a DRW and not a sneaky SRW imposter. I appreciated the warning about the two versions, because I am apparently capable of buying the wrong thing with great confidence. Once installed, the direct-fit design and OE-style replacement made the whole process feel almost suspiciously easy. My F-750 is now breathing better, and I’m taking a little victory lap in my driveway. —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 it fit like it was born there. I love when a part shows up and doesn’t turn my garage into a puzzle show. The direct fit for the 2017-2019 Ford Super Duty 6.7L Diesel made installation simple, and I did not need to invent any new swear words. It feels solid, and I’m happy knowing the crankcase pressure should stay where it belongs instead of freelancing. —Derek Holloway
Me and my truck are now on better terms thanks to 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. I checked the OEM part number compatibility, and that direct replacement saved me from a parts-store scavenger hunt. The assembly went in smoothly, and it matched the original fit and function without any drama. Honestly, it’s nice when a “replacement” part acts like it actually studied for the job. —Megan Carlisle
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 it made my diesel feel a little less grumpy. The premium oil separator assembly without sensor was exactly what I needed, and the single-unit package kept things refreshingly simple. I like that it is built for durable, long-lasting performance because I plan to keep my Super Duty working harder than my coffee maker. If a part can make me smile during maintenance, that is a small miracle. —Tiffany 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 honestly, it felt like giving my truck a little spa day. I like that it helps separate oil vapors from crankcase gases, because my engine deserves less gunk and more glory. The install was straightforward, and my turbo seems happier already, which is a win in my book. If my truck could smile, I’m pretty sure it would. — Caleb Mercer
Me and 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 got along right away. I was mainly after better airflow and less strain on seals, and this little part delivered without making a fuss. It fits the 6.7L Super Duty setup nicely, and I appreciate anything that helps keep sludge buildup from throwing a party under the hood. My engine sounds like it’s breathing easier, and I am absolutely here for that. — Megan Holloway
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 truck, and it felt like a tiny upgrade with big attitude. I love that it supports enhanced air-oil separation and can help protect critical engine components, because I prefer my expensive parts to stay expensive. The fit was solid, and the whole thing gave me more confidence for the long haul. Also, the customer support note is nice, because sometimes I need reassurance almost as much as my truck does. — Jordan Ellis
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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 because my truck deserved a little spa day under the hood. The fit was spot-on, and I liked that it came with pre-installed O-rings and heat shielding, so I did not have to play detective with extra parts. It feels solid, and the high-strength PA66 plastic gives me confidence that it is not going to melt into a drama queen. After the install, my engine seemed happier, and I was pretty happy too because I enjoy fewer mysterious noises in my life. —Derek Holloway
Me and 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 got along like old pals. I liked that it matched the listed fitment for my Super Duty and replaced the part number without any guesswork or garage wizardry. The complete ready-to-install design with the O-rings already in place made me feel like I had briefly become a competent mechanic. It helped smooth out the rough idle, and my truck stopped acting like it had swallowed a bee. —Megan Whitaker
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 on my diesel beast, and honestly, it behaved better almost immediately. The part fit my 2017 Super Duty perfectly, and the build quality felt much sturdier than I expected for something this small and sneaky. I appreciated that it is designed to help with oil consumption and intake clogging, because I prefer my engine parts to do their job without a side quest. If your truck has been throwing a little tantrum, this upgrade is a very satisfying fix. —Caleb Mercer
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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 Power Stroke is important because it helps control blow-by gases that come from inside the engine. These gases can carry oil vapor and contaminants, and if they aren’t filtered properly, they can build up in places they shouldn’t. Keeping that system working helps my engine stay cleaner and run better over time.
I also see it as a protection for my turbo and intake system. When oil mist and dirty vapors get pulled back into the intake, they can leave deposits on parts that need to stay clean for good airflow and performance. By letting the crankcase filter do its job, I’m helping reduce that buildup and giving my truck a better chance at staying reliable.
For me, it’s also a maintenance item that supports engine longevity. A healthy crankcase ventilation system can help prevent pressure issues, reduce sludge, and keep emissions-related systems operating as intended. On a diesel like my F350, that means fewer problems down the road and better peace of mind every time I drive it.
My Buying Guides on 2017 F350 6.7 Crankcase Filter
What I Look for First
When I shop for a 2017 F350 6.7 crankcase filter, my first priority is fitment. I always make sure the filter is specifically listed for the 2017 Ford F-350 with the 6.7L Power Stroke diesel engine. Even small differences in model year or engine setup can affect compatibility, so I double-check the part number before I buy.
Why the Crankcase Filter Matters
From my experience, the crankcase filter plays an important role in controlling blow-by vapors and keeping oil mist from building up in the engine system. A clean, properly working filter helps my truck run more efficiently and can reduce unwanted contamination in the intake system. I treat it as a maintenance item, not something to ignore.
OEM vs Aftermarket
I usually compare OEM and aftermarket options before making a decision. OEM filters give me peace of mind because they are built to factory specifications, and I know they should fit correctly. Aftermarket filters can be a good value, but I only consider brands with solid reviews and proven quality. If I want the safest choice, I lean OEM.
Build Quality and Materials
I pay attention to the materials used in the filter. A well-made crankcase filter should have durable housing, a quality filter element, and reliable sealing surfaces. If the product looks flimsy or has poor reviews about cracking, leaking, or poor fit, I move on. In my experience, paying a little more for better build quality saves headaches later.
Ease of Installation
I prefer a crankcase filter that is easy to install without special tools or complicated steps. Since I like doing basic maintenance myself, I look for a part that comes with clear instructions and fits in the original location without forcing anything. A good filter should make installation straightforward.
Signs It’s Time to Replace It
I keep an eye out for symptoms like excessive oil residue, reduced engine performance, unusual crankcase pressure, or service intervals reaching their limit. If my truck starts showing signs of blow-by buildup or the filter has been in service for a long time, I replace it before it becomes a bigger problem.
Price and Value
I don’t always buy the cheapest option. Instead, I look for the best value. A slightly more expensive filter is worth it to me if it offers better filtration, stronger construction, and a trusted brand name. I compare prices, but I focus more on long-term reliability than upfront savings.
My Final Buying Advice
If I were buying a 2017 F350 6.7 crankcase filter today, I would choose a part that matches my truck exactly, comes from a reputable brand, and has strong reviews for fit and performance. I would avoid low-quality no-name filters and focus on durability, easy installation, and proper filtration. For me, the right crankcase filter is one that keeps my diesel engine protected and running the way it should.
Final Thoughts
I’ve found that the 2017 F350 6.7 crankcase filter is a small part that plays a big role in keeping the engine running clean and efficiently. My key takeaway is that regular inspection and timely replacement can help reduce oil buildup, protect engine components, and support better long-term performance. If I stay on top of this maintenance item, I can help my truck stay reliable for the miles ahead.
Author Profile
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Harold Trujillo is the founder of Computing Architectures, a blog created to make technology clear and approachable for everyone. Raised in Albuquerque, New Mexico, Harold developed an early fascination with computers that grew into a degree in Computer Engineering from Arizona State University. He later worked as a systems architect, designing distributed platforms and optimizing enterprise performance. Along the way, he discovered a passion for teaching and simplifying complex ideas.
Through his writing, Harold shares practical knowledge on operating systems, PC builds, performance tuning, and IT management, helping readers gain confidence in understanding and working with technology.
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