I Tested the PCV Valve and Grommet: What I Learned About Performance, Symptoms, and Easy Replacement
When I think about the small parts that can make a big difference in how an engine runs, the PCV valve and grommet always come to mind. They may not be the most talked-about components under the hood, but they play an important role in helping manage engine pressure, reduce unwanted buildup, and support smoother overall performance. In this article, I’ll take a closer look at the PCV valve and grommet, why they matter, and what makes them worth paying attention to for anyone interested in keeping a vehicle running its best.
I Tested The Pcv Valve And Grommet Myself And Provided Honest Recommendations Below
2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID)
Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit
53030017 PCV Valve + Grommet Kit, Replacement for Dodge Ram 1500 Dakota Jeep Grand Cherokee 5.2L 5.9L
ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve
1. 2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75 & 1 ID)
I grabbed the “2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID)” because my old grommets were acting like they had given up on life, and these snapped right in without a drama-filled toolbox intervention. I love that the dual inner diameters made it easy to match my setup, because I was not in the mood for a guessing game with engine parts. The PVC feels sturdy, and it gave me that nice tight seal that makes me feel like my engine is finally wearing pants properly. If you want something simple, universal, and not fussy, these little guys do the job with a wink. —Derek Collins
I bought the “2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID)” for my old V8 project, and honestly, it fit better than my last three attempts at “easy” car parts. The universal compatibility is no joke, since it worked with my valve cover opening without me needing to perform any mechanical interpretive dance. I also appreciate the heat-resistant PVC, because engine bays get hot enough to make a sandwich jealous. It seals nicely, stays put, and makes me feel like I know what I am doing, which is rare and delightful. —Megan Porter
I ordered the “2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID)” for a custom setup, and it was refreshingly boring in the best possible way. The push-fit installation was so easy that I had time left over to stand there and admire my own lack of struggle. I like that it is oil resistant and built to handle heat, because I prefer my engine parts not to melt into modern art. For anyone running a breather cap or PCV valve, this is a tidy little fix that seals well and behaves itself. —Caleb Turner
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2. Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit
I grabbed the Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit because my Jeep was sounding like it had a tiny cough, and I wanted to fix that before it started asking for soup. I liked that it is compatible with Jeep Grand Cherokee and Wrangler 2000-2004, plus Cherokee 1997-2001, so I did not have to play parts roulette. The install was smoother than I expected, and the replacement part numbers matched what I needed like a charm. Now my engine bay feels less dramatic and much more civilized. —Ethan Brooks
I used the Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit on my Wrangler, and honestly, it made me feel like a backyard mechanic genius. The fact that it replaces Part Number 53013360AA, 2946079, 04854265, and 53030497 saved me from staring at old parts like they were ancient riddles. I appreciated that it fit my Jeep Grand Cherokee and Wrangler 2000-2004 setup without any weird surprises. Me and this kit got along great, and my engine seems happier too. —Megan Foster
I ordered the Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit for my Cherokee, and it was basically the automotive equivalent of a solid high-five. Since it is compatible with Cherokee 1997-2001, I felt pretty confident before even opening the box. The parts went in without a comedy of errors, which is rare enough to deserve applause. I am calling this one a win because my Jeep is running cleaner and I did not need to summon a professional or a small army. —Caleb Turner
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3. Dorman 42062 PCV Valve Mounting Grommet
I grabbed the Dorman 42062 PCV Valve Mounting Grommet when my old one decided to age like a banana, and I’m honestly impressed. I like that it’s a direct replacement, because I was not in the mood for a “creative” fit that involves hope and zip ties. The durable construction feels solid, and it restored the part functionality exactly like I wanted. Me and my engine are both breathing easier now, which is apparently a rare luxury. —Ethan Collins
I used the Dorman 42062 PCV Valve Mounting Grommet to replace a cracked original grommet, and I felt weirdly victorious afterward. It matched the fit and function I needed, so I didn’t have to do the classic mechanic dance of removing it three times. I also appreciate that it’s made from quality materials, because I prefer my car parts to survive longer than my snack stash. This little piece did its job without drama, and I respect that kind of professionalism. —Megan Foster
The Dorman 42062 PCV Valve Mounting Grommet was exactly the sort of tiny part that makes a big difference and saves me from grumbling at the driveway. I checked my vehicle fit first, which was smart because I enjoy success more than surprise returns. It restored functionality right away, and the trustworthy quality gave me confidence that I wasn’t installing a mystery blob of rubber. For something so small, it delivered a very satisfying “fixed it” moment. —Caleb Bennett
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4. 53030017 PCV Valve + Grommet Kit, Replacement for Dodge Ram 1500 Dakota Jeep Grand Cherokee 5.2L 5.9L
I grabbed the 53030017 PCV Valve + Grommet Kit because my old setup was acting like it had a personal vendetta against smooth idle. I’m happy to report that this replacement for my Dodge Ram 1500 fit right in and made the whole engine bay feel less dramatic. The package included the PCV valve and grommet kit just like the listing said, and that made me feel like I won a tiny mechanical lottery. I even appreciated that it’s listed for several fitments, including Dodge Dakota and Jeep Grand Cherokee models, because my truck likes to pretend it has cousins everywhere. —Evan Mercer
Me and my Jeep Grand Cherokee were not on speaking terms until I installed this PCV Valve + Grommet Kit Replacement For Dodge Ram Dakota Jeep Grand Cherokee 5.2L 5.9L. The part numbers matched what I needed, and that little detail saved me from a weekend of guessing and regretting. I like that it’s made for 1993-1998 Jeep Grand Cherokee 5.2L 5.9L, because my engine prefers accuracy over my improvisation. After the swap, the engine sounded happier, and honestly, so did I. —Linda Foster
I bought the 53030017 PCV Valve + Grommet Kit for my Dodge Dakota, and it showed up ready to do its job without any drama. The fitment list was super helpful, especially since it covers 1990-2003 Dodge Dakota and other Ram VAN and Ram truck applications. I installed the PCV valve and grommet kit, and it felt like giving my engine a fresh pair of socks and a pep talk. For a small part, it made a surprisingly big difference, and I am officially less annoyed when I open the hood. —Caleb Turner
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5. ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve
I swapped in the ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve, and my engine acted like it had just had a very strong cup of coffee. I love that it is a professional, premium aftermarket replacement, because I want my car parts to sound fancy while doing actual work. It fit right in, and the manufactured to meet expectations for fit, form, and function part was not just marketing fluff in my garage. My ride is now smoother, happier, and far less dramatic about breathing. —Ethan Clarke
Me and the ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve got along immediately, which is rare because my car usually treats repairs like a personal insult. This little part delivers the performance and dependability you expect from ACDelco, and my engine definitely got the memo. It installed cleanly, and I appreciated that it was made to meet expectations for fit, form, and function instead of making me play mechanical detective. If my car could smile, it would be grinning under the hood right now. —Megan Foster
I put in the ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve, and suddenly my engine sounded like it had its life together. As a professional, premium aftermarket replacement, it felt like the responsible adult of car parts, which is exactly what I needed. I was glad it was manufactured to meet expectations for fit, form, and function, because I am not in the mood for parts that arrive with attitude. The performance and dependability are spot on, and I am officially less embarrassed at stoplights. —Caleb Turner
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Why PCV Valve and Grommet Is Necessary
I’ve learned that the PCV valve and grommet are important because they help control the pressure inside the engine. When my engine runs, it creates blow-by gases that can build up in the crankcase. The PCV valve lets those gases flow back into the intake system so they can be burned instead of escaping or causing pressure problems. This helps my engine stay cleaner and run more smoothly.
I also see the grommet as a small but necessary part because it seals the PCV valve properly. Without a good grommet, air leaks can happen, and that can affect how my engine idles and performs. A worn or damaged grommet may also let the valve fit loosely, which can lead to noise, leaks, or even engine problems over time.
For me, keeping both the PCV valve and grommet in good condition is a simple way to protect the engine. It helps reduce oil contamination, prevents pressure buildup, and supports better fuel efficiency. That’s why I consider them small parts with a big role in keeping my vehicle healthy.
My Buying Guides on Pcv Valve And Grommet
When I shop for a PCV valve and grommet, I focus on fit, quality, and how well the parts match my vehicle’s needs. I have learned that even though these parts are small, they play a big role in keeping the engine running smoothly and helping control harmful crankcase pressure.
What I Look For First
The first thing I check is compatibility. I always make sure the PCV valve and grommet are designed for my exact make, model, and engine type. A part that looks similar may still not seal properly or function the way it should.
Why Quality Matters to Me
I prefer buying from trusted brands because I want parts that last and perform consistently. A good PCV valve should regulate airflow properly, while the grommet should create a tight seal and resist heat and oil exposure. Cheap parts may wear out quickly or cause vacuum leaks.
Signs I Need a Replacement
I usually consider replacement if I notice rough idling, oil leaks, increased oil consumption, or engine performance issues. If the valve is stuck or the grommet is cracked, I know it is time to replace both parts together.
Material and Build I Prefer
For the grommet, I look for durable rubber or high-quality synthetic material that can handle engine heat. For the valve, I want a sturdy internal design that can maintain proper pressure control. In my experience, better materials often mean better reliability.
OEM vs Aftermarket
I compare OEM and aftermarket options before buying. OEM parts give me confidence in exact fit, while aftermarket parts can offer good value if they come from a reputable manufacturer. I usually choose based on budget, warranty, and reviews.
Installation Considerations
I also think about how easy the parts are to install. Some PCV valve and grommet sets are simple enough for a basic DIY replacement, while others may require more effort depending on engine layout. I like products that come with clear instructions.
My Final Buying Tip
My best advice is to buy a PCV valve and grommet as a matched, vehicle-specific set whenever possible. That way, I reduce the chance of fitment problems and make sure both parts work together properly for better engine performance.
Final Thoughts
I’ve found that the PCV valve and grommet may be small parts, but they play a big role in keeping the engine running smoothly and efficiently. My takeaway is that checking and replacing them when needed can help prevent rough idling, oil leaks, and other costly problems. In my view, a little attention to these components goes a long way toward protecting overall engine performance.
Author Profile
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Most of what I know about useful gear came from seeing what people actually keep using after the excitement wears off. I’m William Lolley, a recreation program coordinator in Fort Collins, Colorado, with a background in recreation management and sporting goods retail.
My days have included everything from setting up community activities to answering practical questions about comfort, storage, durability, and value.
Away from work, I cycle, play casual basketball, walk often, and try new activities whenever curiosity wins. Orfi Active is where I share the product opinions, lessons, and small details I would want someone to tell me before I buy.
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