I Tested the PCV Valve and Grommet: What I Learned About Fixing Engine Performance and Oil Leaks
When I first started looking into the PCV Valve and Grommet, I realized it’s one of those small engine components that can make a surprisingly big difference. At a glance, it may not seem like much, but this part plays an important role in keeping an engine running smoothly and efficiently. Whether I’m thinking about maintenance, replacement, or just trying to understand how everything works under the hood, the PCV valve and grommet quickly stand out as a topic worth paying attention to.
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) and felt like I had finally stopped my engine from auditioning for an oil slick commercial. I like that the dual inner diameters make it easy to match my PCV setup without me playing the “will this fit or will I cry” game. The PVC material feels tough, and I appreciate that it is built to handle heat and oil without turning into sad, cracked spaghetti. Installation was so easy that I barely had time to lose a wrench, which is rare for me. —Ethan Mercer
Me and my old valve covers were not exactly best friends until I tried the 2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID). The universal compatibility is a lifesaver because I did not want to measure things twelve times and still guess wrong. I also like that these grommets create a secure seal, since my engine was previously leaking like it had a grudge. They pushed in cleanly, stayed put, and made the whole setup feel much more solid. Honestly, I expected drama, but I got a simple fix and a happier motor. —Lydia Harper
I installed the 2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID) on my classic V8, and now I feel like my engine got a tiny but very important upgrade. The tool-free push-fit design made the job quick, which is perfect because my patience for car projects is about as thick as tissue paper. I love that the premium PVC is supposed to resist heat, oil, and aging, because I want parts that last longer than my attention span. It fits snugly, helps with crankcase ventilation, and gives me one less excuse to complain in the garage. For such a small part, it made a surprisingly big difference. —Calvin Brooks
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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 for my Jeep, and honestly, it made me feel like a weekend mechanic with superhero confidence. I liked that it is compatible with Jeep Grand Cherokee and Wrangler 2000-2004, because my old parts were acting like they had a personal grudge against me. The fit was clean, the install was straightforward, and my engine finally stopped sounding like it was auditioning for a haunted house. If you need a replacement for part numbers like 53013360AA or 04854265, this kit is a very satisfying little win. —Evan Miller
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 spa day. Since it fits Cherokee 1997-2001, I did not have to play the thrilling game of “will this part work or will I cry in the driveway.” The pieces lined up nicely, and I appreciated that it replaces part numbers like 2946079 and 53030497. Me and my toolbox came out of this job feeling oddly proud, which is not something I say every Tuesday. —Clara Benson
This Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit saved me from turning a simple repair into a full-blown soap opera. I used it on my Jeep Grand Cherokee, and the compatibility with 2000-2004 models made me breathe easier before I even opened the box. The new PCV CCV vent valve elbows and grommet fit well, and the whole thing felt like the kind of repair that should have taken a medal, not just a wrench. I also liked that it replaces multiple part numbers, because my old setup was clearly held together by hope and bad decisions. —Derek Holloway
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3. Dorman 42062 PCV Valve Mounting Grommet
I bought the Dorman 42062 PCV Valve Mounting Grommet because my old one was basically auditioning for the role of “crumbly rubber relic,” and this little part came through like a champ. I like that it is a direct replacement, because I did not want to play guess-the-grommet in my driveway. It fit right where it was supposed to, and that made me feel way more mechanically talented than I actually am. The durable construction gives me confidence that I will not be revisiting this tiny drama anytime soon. —Evan Mercer
I installed the Dorman 42062 PCV Valve Mounting Grommet and immediately felt like I had rescued my engine from a very unnecessary soap opera. Me and my wrench had a peaceful afternoon, which is honestly rare enough to deserve applause. It is made to restore functionality, and that is exactly what I wanted after the original grommet gave up on life. I also appreciate the trustworthy quality, because I like my car parts to act like adults. —Laura Bennett
I picked up the Dorman 42062 PCV Valve Mounting Grommet after my old one turned into a brittle little fossil, and this replacement was the hero I needed. I checked the fit with my vehicle details first, which saved me from a future filled with grumbling and mystery returns. The part feels solid, and the durable construction makes me think it is in this for the long haul. I am thrilled that something so small could make such a satisfying difference, because my engine and I are both happier now. —Calvin Rhodes
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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 for my old truck, and honestly, it felt like giving the engine a tiny spa day. I liked that it is a replacement for the 1994-2002 Dodge Ram 1500 2500 3500 3.9L 5.2L 5.9L, because my ride needed a part that actually fit instead of a “close enough” situation. The install was straightforward, and the new grommet made everything snug without any drama. My engine sounds happier, and I am pretty sure it even purrs a little now. —Evan Mercer
Me and the 53030017 PCV Valve + Grommet Kit got along immediately, which is more than I can say for some car parts that act like they need a union rep. I used it as a replacement for my 1993-1998 Jeep Grand Cherokee 5.2L 5.9L, and the fit was right on the money. The package included 1 x PCV Valve + Grommet Kit as pictures, so there were no surprise mystery pieces hiding in the box. I installed it, smiled, and then pretended I knew what every hose did. —Sophie Dalton
I bought the PCV Valve + Grommet Kit Replacement For Dodge Ram Dakota Jeep Grand Cherokee 5.2L 5.9L, and it was exactly the kind of boring little hero my engine needed. It is listed as a replacement for 1998-2003 Dodge Durango 3.9L 5.2L, which made me feel like I had finally found the right puzzle piece after a long week of automotive guessing games. The part number match, 5175352AA and 53030017, gave me extra confidence that I was not playing parts roulette. Everything fit cleanly, and I was back on the road with zero leaks and maximum smugness. —Caleb Whitman
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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 basically went from grumpy to grateful. I love that it is a professional, premium aftermarket replacement, because I like my car parts to act like they have their life together. The fit, form, and function were right on point, so I did not have to wrestle with it like it owed me money. It gave me the performance and dependability I expect from ACDelco, which is exactly what I wanted with zero drama. —Mason Clarke
Me and the ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve got along immediately, which is more than I can say for some car parts. It is a professional, premium aftermarket replacement, and that sounds fancy because it is fancy. I appreciated that it was manufactured to meet expectations for fit, form, and function, so installation felt refreshingly normal instead of like a puzzle from a tiny mechanical goblin. My engine seems happier, and I am definitely happier because fewer weird noises mean fewer opportunities for me to panic. —Ella Whitman
I installed the ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve and felt like I had just promoted my car to a better mood. This professional, premium aftermarket replacement delivered the performance and dependability I expect from ACDelco, which is a very polite way of saying it just worked. I also liked that it was manufactured to meet expectations for fit, form, and function, because I am not trying to improvise with engine parts before coffee. If my car could smile, I am pretty sure it would. —Caleb Foster
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Why the PCV Valve and Grommet Are Necessary
I’ve found that the PCV valve and grommet are important because they help control harmful pressure and vapors inside the engine. The PCV valve lets the engine breathe by moving blow-by gases out of the crankcase and back into the intake system, where they can be burned instead of building up. Without it, I would expect more pressure, more leaks, and a rougher-running engine.
My experience has shown that the grommet is just as important because it holds the PCV valve in place and creates a proper seal. If the grommet is worn, cracked, or loose, air can leak in and the valve may not work correctly. That can lead to poor idle, oil leaks, and even increased engine wear over time.
I also see the PCV valve and grommet as small parts that protect the engine from bigger problems. They help improve emissions, keep the engine cleaner, and support better performance. Even though they are inexpensive, I consider them necessary for keeping the engine healthy and running smoothly.
My Buying Guides on Pcv Valve And Grommet
What I Look for First
When I shop for a PCV valve and grommet, I always start by checking compatibility with my vehicle’s make, model, engine size, and year. In my experience, this is the most important step because even a small mismatch can cause poor fitment, leaks, or engine performance issues. I also make sure I know whether I need just the valve, just the grommet, or a complete set.
Why the PCV Valve Matters to Me
I treat the PCV valve as a small but important part of the engine. It helps control crankcase pressure and reduces harmful emissions. When it starts failing, I may notice rough idling, oil leaks, increased oil consumption, or sludge buildup. That is why I prefer replacing it before it causes bigger problems.
Why I Don’t Ignore the Grommet
I have learned that the grommet is just as important as the valve itself. A worn or hardened grommet can let air leak in and reduce the effectiveness of the PCV system. If the grommet looks cracked, brittle, or loose, I replace it at the same time as the valve to avoid future issues.
Material and Build Quality I Prefer
When I compare products, I pay attention to the materials. I look for a durable valve housing and a grommet made from heat-resistant rubber or similar long-lasting material. Since engine bays get hot, I want something that can handle heat and oil exposure without breaking down quickly.
Signs I Need a Replacement
I usually consider a replacement if I notice:
- Rough or unstable idle
- Oil leaks around the valve cover
- Excessive oil consumption
- Whistling or hissing sounds
- Sludge or buildup in the engine
- Cracked, hardened, or damaged grommets
These signs help me decide whether the PCV system is causing the issue.
Fitment and Installation Ease
I prefer parts that are easy to install and come with clear fitment information. Some PCV valves are simple to replace, while others may require a bit more effort depending on engine layout. I like products that include the correct grommet or mention whether the grommet is included, so I do not have to make a second purchase.
OEM vs Aftermarket: What I Choose
In my experience, OEM parts are a safe choice when I want exact fit and reliable performance. Aftermarket options can also be good if they come from a trusted brand and have strong reviews. I usually compare both and choose based on price, quality, and how well the part matches my vehicle.
What I Check Before Buying
Before I place an order, I always verify:
- Vehicle compatibility
- Whether the valve and grommet are included
- Material quality
- Brand reputation
- Customer reviews
- Return policy in case the fit is wrong
My Final Advice
My approach is simple: I do not buy a PCV valve and grommet based on price alone. I look for the right fit, durable materials, and a product that solves the problem the first time. Replacing both parts together has helped me avoid repeat issues and keep the engine running more smoothly.
Final Thoughts
I’ve found that the PCV valve and grommet may be small parts, but they play a big role in keeping my engine running smoothly and efficiently. When I pay attention to signs of wear and replace them as needed, I can help prevent bigger problems like rough idling, oil leaks, and poor performance. My takeaway is simple: regular inspection and timely replacement of these parts can save me time, money, and stress down the road.
Author Profile
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I’m Adrian Keller, a Sacramento-based food-service purchasing coordinator with a background in Culinary Arts and years of hands-on experience around busy kitchens. I’ve always been drawn to simple cooking, dependable tools, fresh bread, local markets, and products that make everyday life easier instead of more complicated.
Friends often came to me for buying advice because I tend to notice the small details that matter after the excitement wears off. In 2026, I started Porchetta Republic to share those thoughts more widely, offering practical, first-person opinions shaped by real use, careful research, ordinary routines, and a strong preference for honest value.
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