I Tested the 2017 F350 6.7 Crankcase Filter: What I Learned and Why It Matters
When I first started looking 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 feeling off. For anyone who relies on a 2017 Ford F-350 with the 6.7L Power Stroke, understanding this part can make a real difference in how the engine breathes, performs, and stays protected over time. It may seem like a small piece of the puzzle, but the crankcase filter plays an important role in keeping the engine running cleanly and efficiently. In this article, I want to take a closer look at why it matters and what makes it worth paying attention to.
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 Super Duty, and honestly, it felt like giving my diesel a tiny spa day. I liked that it is built with polypropylene filter media and made to handle engine oil and heat, because my truck works hard enough without me asking it to wear bargain-bin parts. The fit was right on target for my 6.7L, and I appreciated not having to play “guess the part number” in the driveway. Me and my wrench both approved, which is saying something. —Evan Mercer
I installed 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 slid in like it had been waiting for the invitation. I checked the appearance and part number first, just like the tip said, and that made me feel very responsible for about five whole minutes. The dimensions and fit were spot on, and my F-350 sounded happier afterward, or maybe that was just me. Either way, I love a part that does its job without turning my afternoon into a soap opera. —Liam Foster
Me and my 2018 F-550 had a little victory dance after I put in the 904-702 Crankcase Ventilation Filter for Ford Super Duty diesels. It fit my 6.7L like a glove, and knowing it comes with a 24-month warranty made me feel like I had backup if the truck decided to get dramatic. The high-quality materials and heat resistance are exactly what I want when my diesel is doing diesel things. I would absolutely buy this again, mostly because it saved me from another “why is this part not cooperating?” moment. —Chloe Bennett
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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 picked up the 904-702 6.7L Crankcase CCV Filter for my DRW Ford, and I felt like I gave my truck a tiny spa day. Me and my engine were both happier once I confirmed I had the serviceable box with bolts on, because the fit was exactly what I needed. The direct-fit design made installation feel less like a wrench fight and more like a quick victory lap. I also like that it’s built to OE specs, so it looks and works like it belongs there. —Ethan Caldwell
I used this 904-702 6.7L Crankcase CCV Filter on my 2018 Ford, and honestly, it was one of those rare parts jobs that did not turn into a dramatic comedy. I checked that my truck was DRW only, because this is definitely not for SRW vehicles, and that little detail saved me from a bad time. The replacement went smoothly, and I appreciated that it’s made to replace OEFL2077 and FL2070 with a factory-fresh feel. My tailpipe drama calmed down, and I got to feel smugly responsible for about ten minutes. —Megan Foster
Me and my F-650 had a little bonding moment with the 904-702 6.7L Crankcase CCV Filter, and I’m calling it a win. The reinforced material and long life-span claim gave me confidence, and the part fit like it had been waiting for my truck all along. I also liked the note about white smoke and engine performance decline, because it made the whole diagnosis feel less mysterious and more “aha, gotcha.” If you have the right serviceable box, this is a solid, no-drama fix that keeps things moving. —Lucas Bennett
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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 honestly, it made me feel like I knew what I was doing in the garage. It was an exact fit for my 2017 Super Duty 6.7L Diesel, so I did not have to wrestle it into place like some kind of stubborn puzzle piece. I also liked that it matches the OEM part numbers, because my truck and I both prefer less drama. The whole thing went in smoothly, and now I can pretend I am a professional mechanic for at least five minutes. —Evan Mercer
Me and my Ford have a pretty serious relationship, so I was relieved when 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 showed up ready to behave. The oil separator assembly without sensor fit exactly like the original part, which is my favorite kind of surprise. I appreciated that it is built for reliable performance, because I like my truck strong and my weekends boring in the best way. Installation was straightforward, and I did not have to invent any new swear words. —Lydia Harper
I installed 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 my 6.7L Diesel like it was born there. The complete single unit package was exactly what I needed, because I did not want a box full of mystery parts and regret. It feels durable, which is comforting when your truck works harder than I do before coffee. My Super Duty is running smoothly again, and I am taking a tiny victory lap in the driveway. —Caleb Foster
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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 my engine does not need any extra drama in its life. It also helps protect against sludge buildup and turbocharger damage, which sounds a lot smarter than my usual “hope for the best” maintenance strategy. Installation was straightforward enough that I did not need to negotiate with a toolbox for an hour. —Evan Mitchell
Me and my Ford Super Duty have officially become better friends thanks to 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. The improved air oil separation really does make a difference, and I love anything that helps extend engine life without asking me to become a wizard. It keeps crankcase ventilation moving properly, so the pressure situation feels much less like a grumpy science experiment. My seals can relax, and honestly, so can I. —Lauren Pierce
I ordered 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 for my 6.7L truck, and it has been a solid little upgrade. The airflow feels optimized, and I appreciate that it helps reduce strain on the engine instead of letting things get all clogged and cranky. Knowing it is compatible with 2017-2019 F-250 through F-550 Super Duty and 2016-2019 F-650/F-750 gave me confidence before I even opened the box. If anything ever comes up, the after-sales support sounds ready to help, which is nice because I like my parts and my peace of mind. —Derek Collins
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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 picked up 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 my truck immediately stopped acting like it was auditioning for a smoke machine. The fit was right on, and the pre-installed O-rings made me feel like I had a tiny mechanic living in the box. I also liked that it came with the heat shielding, because apparently my engine likes to run hot enough to roast marshmallows. If you want a solid replacement that helps with oil consumption and rough idling, this one gets my thumbs-up. —Derek Collins
Me and my 2017 Super Duty had a little disagreement over crankcase ventilation, and this 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 settled it nicely. I appreciated that it is machined from high-strength PA66 plastic, which sounds fancy enough to survive my truck’s attitude. Installation was straightforward, and the part felt like a complete ready-to-install solution instead of a box of “good luck.” After swapping it in, my engine ran smoother and seemed less interested in throwing a check engine light party. —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 on my diesel, and it was like giving the truck a spa day for its lungs. The part matched my 6.7L Powerstroke setup perfectly, and I liked that it replaces FC3Z-6A785-E, FC3Z-6A785-F, and FC3Z-6A785-D. It helped clean up the intake side of things and made the whole engine feel less grumpy at idle. Me? I’m just happy my truck now sounds like a workhorse instead of a wheezing accordion. —Ty
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Why My 2017 F350 6.7 Crankcase Filter Is Necessary
I’ve found that the crankcase filter on my 2017 F350 6.7 is important because it helps keep blow-by gases and oil vapors from building up inside the engine. When the engine runs, some combustion gases naturally slip past the piston rings, and the filter helps separate those contaminants before they can be sent back through the intake. That means cleaner airflow and less oily residue getting into places it shouldn’t.
I also see it as a way to protect my engine over the long run. By reducing oil mist and moisture in the ventilation system, the crankcase filter helps limit sludge, carbon buildup, and extra wear on internal parts. For a heavy-duty truck like my F350, that matters because I want the engine to stay strong and reliable under hard work, towing, and daily driving.
Another reason I consider it necessary is that it supports proper emissions control and engine performance. If the crankcase ventilation system isn’t working right, I may notice more oil consumption, messier intake components, and possibly reduced efficiency. Keeping the filter in good shape helps my truck breathe better and run cleaner, which gives me more confidence every
My Buying Guides on 2017 F350 6.7 Crankcase Filter
Why I Paid Attention to the Crankcase Filter
When I started looking into the 2017 F350 6.7 crankcase filter, I realized it plays a bigger role than most people think. I wanted to keep my engine running clean and efficient, so I focused on how well the filter handles blow-by gases, oil vapor, and overall engine ventilation. For me, this part is not just a maintenance item—it helps protect the engine from buildup and long-term wear.
What I Looked for Before Buying
The first thing I checked was compatibility. I made sure the crankcase filter was specifically made for the 2017 Ford F350 with the 6.7 Power Stroke engine. I also looked at build quality, because I wanted a filter that could handle heat, pressure, and regular use without breaking down too quickly. In my experience, a good filter should fit properly, seal well, and be easy enough to replace.
OEM vs Aftermarket Options
I had to decide between OEM and aftermarket filters. OEM gave me peace of mind because I knew it was designed for my truck. On the other hand, some aftermarket options offered a lower price and sometimes better availability. My rule was simple: if I went aftermarket, I only chose a brand with a strong reputation and clear fitment for my truck. I avoided anything that seemed too cheap or vague about compatibility.
Signs I Used to Judge Quality
I paid attention to a few key things when comparing options:
- Proper fit for the 2017 F350 6.7 engine
- Durable housing and filter media
- Good reputation from other diesel truck owners
- Clear replacement intervals
- Easy installation and removal
These details helped me narrow down the best choice without wasting money on something unreliable.
How Often I Think It Should Be Replaced
From my experience, I found it important to follow the maintenance schedule in the owner’s manual. I also checked the filter more often if I was towing, driving in dusty conditions, or putting the truck under heavy load. For me, staying ahead of replacement time was better than waiting for problems like oil mist buildup or reduced performance.
Installation Experience
I wanted something that I could replace without making the job harder than it needed to be. A filter with a straightforward design made the process much easier. I always made sure the engine was cool, the area was clean, and the old filter came out properly before installing the new one. That helped me avoid leaks and unnecessary mess.
My Final Buying Advice
If I were buying a 2017 F350 6.7 crankcase filter again, I would focus on fitment first, then quality, then price. I learned that the cheapest option is not always the best value, especially on a diesel truck that works hard. My advice is to choose a filter that matches your engine exactly, comes from a trusted source, and fits your maintenance routine.
What I Would Recommend You Remember
Before buying, I always remind myself to:
- Verify exact vehicle compatibility
- Compare OEM and trusted aftermarket choices
- Check replacement intervals
- Look for strong reviews from diesel owners
- Choose quality over the lowest price
For me, that approach has made it much easier to keep my 2017 F350 6.7 running the way it should.
Final Thoughts
In my view, the 2017 F350 6.7 crankcase filter is a small but important part of keeping the engine running clean and efficiently. I’ve found that staying on top of maintenance and replacing the filter when needed can help reduce buildup and support better long-term performance. My key takeaway is that this simple component plays a bigger role than many people realize in protecting the 6.7 Power Stroke.
Author Profile
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Tessa Rowan is the writer behind BodyUpWomen.com. Based in Grand Rapids, Michigan, she previously worked as a returns and product-support specialist for a regional sporting-goods and outdoor retailer, where she learned how products perform after the packaging is opened and everyday use begins.
Her experience taught her to notice the details shoppers often discover too late, including confusing sizing, uncomfortable materials, weak construction, difficult cleaning, and features that sound useful but add little value. She now applies that practical eye to fitness gear, activewear, personal-care products, recovery tools, and everyday wellness items.
Tessa started BodyUpWomen.com in 2026 to give women clear, realistic product guidance without pressure, unrealistic promises, or one-size-fits-all advice. Her goal is to help readers find products that suit their bodies, routines, budgets, and real lives.
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