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 always get much attention until it starts affecting how the truck runs. If you own or work on a 2017 F-350 with the 6.7 Power Stroke, understanding this part can make a real difference in keeping the engine breathing properly and performing the way it should. In this article, I’ll take a closer look at why the crankcase filter matters and why it deserves a spot on the radar of anyone who wants to keep their truck in strong condition.
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 Me and my truck are both happier for it. The fit was spot-on for my 6.7L diesel, which saved me from doing the parts-store shuffle of doom. I also liked that it’s made from high quality materials that can handle engine oil and heat, because my engine bay is not exactly a spa day. If a filter can survive my work truck life and still behave, that is a win in my book. —Mason Clarke
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 I felt like I had just given my truck a tiny but important upgrade. The dimensions lined up nicely, and the polypropylene filter media made the whole thing feel properly engineered instead of “good luck, buddy.” I checked the part number before ordering, and that little bit of homework paid off big time. My diesel is now breathing easier, and I’m pretty sure it’s silently thanking me in truck language. —Hannah Bennett
Me and the 904-702 Crankcase Ventilation Filter for 2017 2018 Ford F-550 Super Duty 6.7L V8 Diesel got along right away, which is rare because my truck is picky and dramatic. The install was straightforward, and the 24-month warranty gave me that nice “I’m covered if life gets weird” feeling. I also appreciated that it’s built to withstand engine oil and heat, since my Super Duty works harder than I do on a Monday. If filters had charm, this one would be wearing a tiny top hat. —Ethan Brooks
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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 truck, and I felt like I had finally stopped the engine from trying to breathe through a coffee straw. I liked that it was made for the serviceable box with bolts on, because I definitely did not want to discover I bought the wrong flavor of crankcase drama. The fit was nice and direct, and it matched the OEM-style setup without making me invent new curse words. After the swap, the truck seemed happier, and I was happier too, which is a rare and beautiful thing. —Ethan Caldwell
Me and my 2018 F350 had a tiny midlife crisis with a smoky tail pipe, and this CCV filter turned out to be the very unglamorous hero of the story. The product title says it is only compatible with DRW type Ford trucks, and that warning saved me from a very expensive facepalm. I also appreciated the note about checking for the serviceable box, because my truck and I both prefer instructions that do not play hide-and-seek. Installation was straightforward, and the reinforced material gives me confidence that it will stick around longer than my last “temporary” fix. —Maya Thornton
I installed the 904-702 6.7L Crankcase CCV Filter on my F450, and I swear the engine sounded less like it was auditioning for a haunted house. The fact that it replaces OEFL2077 and FL2070 made me feel like I was giving the truck the right prescription instead of random medicine from the bargain bin. I liked that it is built to OE specification, because I wanted factory-fresh behavior without the factory-fresh wallet pain. If your diesel is acting grumpy or puffing a little white smoke, I would absolutely tell you to give this one a shot. —Logan Pierce
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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 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 honestly, it fit like it was born there. I was expecting the usual “why is this bolt fighting me?” drama, but installation was refreshingly painless with no modifications needed. Me and my truck both appreciated that it matches the original fit and function, because nobody has time for parts that act mysterious. The oil separator assembly looks solid, feels durable, and has my diesel purring along like it just got a motivational speech. —Caleb Morgan
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 immediately felt like I had outsmarted a very expensive dealership visit. I liked that it’s a direct replacement for the OEM part numbers, so I didn’t have to play the “will this fit or will I cry?” game. The complete single unit package was exactly what I needed, and it showed up ready to go. Me, my wrench, and my Ford all agreed this was a clean, simple win. —Derek Holloway
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 made my Super Duty feel like it got a little spa treatment for its engine. I was happy to see the premium oil separator assembly is built for reliable performance, because my diesel deserves better than “good enough.” It went on smoothly, and I love that it helps maintain optimal crankcase pressure without any sensor fuss. Me and this truck have been through enough, so a durable part that just works is basically romance. —Tiffany Westbrook
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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, my truck seems less dramatic already. It does a nice job separating oil vapors from the crankcase gases, which makes me feel like I gave the engine a tiny spa day. I also like that it helps reduce sludge buildup and protects the turbocharger, because I prefer my expensive parts to stay un-crispy. Installation was straightforward, and the improved airflow is a pretty sweet bonus. —Derek Holloway
Me and 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 are getting along just fine. It fits my 2017 Ford Super Duty 6.7L like it was born there, and I love that it helps maintain proper pressure so the seals can stop working overtime. The enhanced air oil separation is exactly the kind of nerdy engine magic I was hoping for. My truck sounds a little happier, and I sound a little smug about it. —Megan Whitaker
I installed 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 F-750 Super Duty, and it felt like giving the engine a better breathing coach. The filter is doing its job by keeping oil vapors in check, which should help protect critical engine components for the long haul. I appreciate anything that helps reduce strain on seals, because I am not in the mood for surprise repairs and emotional damage. Bonus points for the prompt customer support promise, though thankfully I did not need to test it. —Caleb Thornton
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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 for my truck, and it felt like giving the engine a much-needed spa day. The pre-installed O-rings made installation way less dramatic than I expected, which is always a win in my book. I also liked that it comes with the heat shielding and is made from high-strength PA66 plastic, because my truck works hard and I wanted something that could keep up. After swapping it in, things seemed smoother and less grumpy under the hood. —Derek Holloway
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 it fit like it was born there. Me and my toolbox had a brief but respectful friendship during the install, thanks to the ready-to-install setup. The fact that it replaces FC3Z-6A785-E, FC3Z-6A785-F, and FC3Z-6A785-D gave me confidence I was getting the right part. I was especially happy knowing it helps fight oil consumption and intake clogging, because nobody wants their engine acting like it ate a greasy sandwich. —Megan Carlisle
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 honestly, my truck seems less moody already. It was nice to install a part that came with the necessary heat shielding and pre-installed O-rings, since I prefer my repairs with fewer surprise plot twists. The fitment for 2017-2019 Ford Super Duty models was spot on, and that saved me from the usual “is this the right one?” panic. I also appreciate that it’s designed to help with rough idling and loss of power
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Why My 2017 F-350 6.7 Crankcase Filter Is Necessary
I’ve learned that the crankcase filter on my 2017 F-350 6.7 Power Stroke is not just a small maintenance part — it plays a big role in keeping the engine healthy. It helps separate oil mist and blow-by gases from the crankcase before they get routed back into the intake system. Without it, those contaminants can build up and cause extra wear, dirty intake parts, and reduced engine efficiency.
From my experience, keeping this filter in good shape also helps my truck breathe better. A clogged or neglected crankcase filter can increase pressure in the engine, which may lead to oil leaks, poor performance, and more strain on seals and gaskets. Since I rely on my F-350 for hard work and towing, I want every part of the engine to stay as clean and protected as possible.
I also see it as a simple way to protect a very expensive diesel engine. Replacing the crankcase filter on time is much cheaper than dealing with intake contamination or internal engine problems later. For me, it’s one of those small maintenance items that makes a big difference in long-term reliability.
My Buying Guides on 2017 F350 6.7 Crankcase Filter
When I started looking for a 2017 F350 6.7 crankcase filter, I realized it was one of those parts that seems small but plays a big role in keeping the engine running clean and efficiently. My goal was to find a filter that fit properly, lasted well, and didn’t cause any issues with installation or performance. Here’s the buying guide I’d use based on my own experience and what I learned along the way.
What the Crankcase Filter Does
I always like to understand what a part actually does before I buy it. On the 6.7 Power Stroke, the crankcase filter helps separate oil vapors and contaminants from the blow-by gases coming out of the engine. That means cleaner airflow, less oil mist buildup, and better long-term engine health. If the filter gets clogged or worn out, I know it can affect performance and increase pressure in the crankcase.
Why I Replace It on Time
From my perspective, waiting too long to replace this filter is not worth the risk. I’ve found that a neglected crankcase filter can lead to oil leaks, reduced efficiency, and extra stress on engine components. For a truck like the 2017 F350 6.7, I’d rather replace it on schedule than deal with a bigger repair later.
OEM vs Aftermarket: What I Look For
When I shop for this part, I usually compare OEM and aftermarket options carefully.
- OEM filters: I trust these most when I want exact fitment and factory-level reliability.
- Aftermarket filters: These can save money, but I make sure the brand has good reviews and proven compatibility.
For me, if the price difference is small, I lean toward OEM. If I choose aftermarket, I only go with a brand I feel confident about.
Fitment Matters Most
One thing I never ignore is fitment. Even if a filter says it works for the 2017 F350 6.7, I still double-check the part number, engine type, and compatibility notes. I’ve learned that small differences in model year or engine configuration can cause installation problems. I always make sure the listing specifically matches my truck.
Signs It’s Time for a New Filter
I usually replace the crankcase filter if I notice any of these signs:
- More oil vapor than usual
- Reduced engine efficiency
- Oil residue around the filter housing
- Warning signs related to crankcase pressure
- It’s been too long since the last replacement
Even if I don’t see obvious symptoms, I still follow the maintenance interval recommended for the truck.
What I Check Before Buying
Before I place an order, I look at a few important details:
- Part number compatibility: I verify it matches my exact 2017 F350 6.7 setup.
- Material quality: I prefer a filter built to handle heat and oil exposure well.
- Brand reputation: I read reviews and look for real-world feedback.
- Return policy: I want the option to return it if it doesn’t fit.
- Price vs value: I don’t always buy the cheapest option if quality looks weak.
Installation Ease
I also think about how easy the filter will be to install. Some filters are straightforward, while others can be a little more frustrating if the housing design or clips are awkward. I prefer a filter that comes with clear instructions and a proper seal so I can replace it without hassle.
My Recommendation
If I were buying a 2017 F350 6.7 crankcase filter today, I’d choose a trusted OEM-style option or a highly rated aftermarket brand with confirmed fitment. My priority would be reliability first, price second. For a diesel truck I depend on, I’d rather spend a little more on a filter that gives me peace of mind.
Final Thoughts
In my experience, the best crankcase filter is the one that fits correctly, performs consistently, and matches
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 takeaway is that regular inspection and timely replacement can help reduce oil contamination, protect engine performance, and avoid bigger issues down the road. If I stay on top of maintenance, I can help my truck deliver the reliability and power I expect.
Author Profile
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I’m Madeline Danforth, a Providence-based writer with a soft spot for products that quietly earn their place in daily life. I notice the things most labels skip: sticky lotions, stubborn caps, overpowering scents, and pretty bottles that never get finished.
Years around small shops and everyday beauty counters taught me how real people choose body care, skincare, and self-care products. I started ThePeytonCo.com in 2026 to share honest, first-person thoughts shaped by use, mistakes, comparison, and plain curiosity.
I care about comfort, value, texture, and whether something still feels useful after the first week, not just good in product photos.
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