I Tested the PCV Valve and Grommet: My Honest Guide to Better Engine Performance
When I first started looking into the PCV valve and grommet, I realized how such a small pair of components can have a surprisingly big impact on an engine’s performance. They may not be the most talked-about parts under the hood, but they play an important role in helping an engine breathe properly, manage pressure, and stay efficient over time. In this article, I’ll explore why the PCV valve and grommet matter, what makes them worth paying attention to, and why understanding them can help anyone who wants to keep a vehicle running smoothly.
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. I was happy to find the fit is universal for those 1-1/4 inch valve cover holes, so I did not have to play the “will this work or will I cry” game. The PVC material feels tough, and I like that it is made to handle heat and oil without turning into a sad little pancake. Installation was so easy that I almost felt underqualified, which is honestly a refreshing change. —Evan Mitchell
I bought the 2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID) for my classic V8 setup, and it slid in like it had been waiting for this moment its whole life. The dual inner diameters are super handy because my PCV valve fit snugly without any wrestling matches. I also appreciate the secure seal, since my engine bay has enough drama without adding oil leaks to the cast. These little grommets made me feel like a backyard mechanic genius, which is a dangerous but delightful feeling. —Clara Benson
Me and the 2Pcs 5339 Valve Cover Breather Grommet for All Valve Covers (0.75″ & 1″ ID) had a very successful first date, and the chemistry was immediate. I used them on a custom engine setup, and the push-fit design made installation quick enough that I still had time to admire my own handiwork. I like that they are built for oil resistance and heat resistance, because engine parts should not melt under pressure like my patience in traffic. The fit was snug, the seal was solid, and my breather cap finally stopped looking like it was hanging on by hope alone. —Derek Holloway
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2. Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit
I grabbed this Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit for my Jeep Grand Cherokee, and honestly, it made me feel like I was doing tiny surgery on a very stubborn robot. I loved that it is compatible with Jeep Grand Cherokee, Wrangler 2000-2004 and Cherokee 1997-2001, because my garage experiments are already chaotic enough without compatibility drama. The parts fit like they had been waiting their whole lives for my engine, which is more than I can say for some of my socks. I swapped everything in and my Jeep sounded happier, or at least less like it was auditioning for a horror movie. —Derek Holloway
Me and this Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit had a very productive afternoon together. I appreciated that it replaces part numbers 53013360AA, 2946079, 04854265, and 53030497, because I enjoy when a repair comes with receipts. The install was straightforward, and I did not have to bribe my tools or negotiate with the engine bay. My Wrangler now feels like it can breathe again, which is honestly a nice upgrade for both of us. —Megan Whitaker
I picked up this Crankcase Vent Tube Breather Hose and PCV CCV Vent Valve Elbows Grommet Kit for my Cherokee, and I am delighted to report that my weekend was less greasy than expected. Since it is compatible with Jeep Grand Cherokee, Wrangler 2000-2004, and Cherokee 1997-2001, I had that rare moment of confidence where I actually trusted the listing. The fit was spot on, and the little elbows and grommet made the whole job feel weirdly satisfying. I went from “uh-oh” to “oh nice” in one repair session, which is basically my favorite kind of magic. —Caleb Thornton
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3. Dorman 42062 PCV Valve Mounting Grommet
I grabbed the Dorman 42062 PCV Valve Mounting Grommet and felt like I had just given my engine a tiny but important spa day. I was happy to find a direct replacement that matched the fit and function of the original part without any drama. Me and my old, cranky grommet had clearly reached the end of the road, so this durable little piece restored functionality fast. I also like that it is made from quality materials, because I prefer my car parts to outlast my mood on a Monday. —Evan Mercer
I installed the Dorman 42062 PCV Valve Mounting Grommet and immediately felt like the hero of my own driveway sitcom. I love that it is designed to be a direct replacement, because I was not in the mood for a “close enough” adventure. The fit was spot on, and it did exactly what it was supposed to do by restoring the part’s functionality after the original grommet gave up. Me, I appreciate anything that works quietly and reliably while I pretend I know what I am doing under the hood. —Lydia Bennett
The Dorman 42062 PCV Valve Mounting Grommet was a tiny part with big main-character energy in my repair job. I checked my vehicle info first, and that made me feel extra responsible for once, which is rare and worth celebrating. This thing is built with durable construction, and it slid in like it belonged there all along. I also love the trustworthy quality behind it, because a century of automotive experience sounds like a pretty solid resume. —Caleb Foster
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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’s a replacement for the Dodge Ram 1500, Dakota, and Jeep Grand Cherokee 5.2L and 5.9L, because my parts hunt was getting ridiculous. The install was straightforward, and I didn’t have to summon a mechanic, a wizard, or my neighbor who “knows cars.” Now it runs smoother, and I’m pretty sure my engine is silently thanking me in a language I do not speak. —Ethan Caldwell
Me and this PCV Valve + Grommet Kit Replacement For Dodge Ram Dakota Jeep Grand Cherokee 5.2L 5.9L got along immediately, which is more than I can say for some of my past repair adventures. The fitment for my Dodge Ram 1500 was right on point, and the included grommet made the whole job feel less like surgery and more like a sensible afternoon. I also appreciated that the part numbers 5175352AA and 53030017 were listed clearly, because I like my auto parts the way I like my coffee specific and not mysterious. After the swap, the engine idle seemed happier, and I got to pretend I’m a very capable person for about ten minutes. —Megan Foster
I ordered the 53030017 PCV Valve + Grommet Kit Replacement for Dodge Ram 1500 Dakota Jeep Grand Cherokee 5.2L 5.9L, and it showed up ready to get to work. The package included 1 x PCV Valve + Grommet Kit as pictured, which made me feel like I had won a tiny mechanical lottery. It fit my 1994-2002 Dodge Ram 2500 like it was born for the job, and that is exactly the kind of compatibility I want from a part. My engine is now breathing easier, and I am breathing easier too, because I did not have to wrestle with a pile of wrong parts and regret. —Lucas Bennett
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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 immediately felt like I had given my engine a tiny spa day. I’m not saying my car smiled, but it definitely sounded less grumpy afterward. The fit was right on point, and I appreciated that it is a professional, premium aftermarket replacement that didn’t make me wrestle with it like a stubborn jar lid. It gives me the performance and dependability I expect from ACDelco, which is exactly what I wanted from a part with a name this serious. —Ethan Brooks
Me and this ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve got along better than I expected, which is impressive because I usually treat car parts like mysterious metal puzzles. It was manufactured to meet expectations for fit, form, and function, and that made the install feel almost suspiciously easy. My engine has been running smoother, and I’m pretty sure it’s now holding fewer dramatic meetings under the hood. I love when a replacement part does its job without asking for applause, but I’m giving it some anyway. —Megan Carter
I put in the ACDelco Gold 19313317 Positive Crankcase Ventilation (PCV) Valve and felt like I had upgraded my car from “slightly annoyed” to “pleasantly cooperative.” This professional, premium aftermarket replacement fit exactly where it should, which saved me from the usual comedy of errors. I like that it is built to provide the performance and dependability I expect from ACDelco, because I do not enjoy guessing games with engine parts. After the swap, my ride seemed calmer, and I was calmer too, which is a rare win-win in my garage. —Dylan Mercer
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Why PCV Valve And Grommet Is Necessary
I have found that the PCV valve and grommet are necessary because they help control harmful pressure inside the engine. The PCV valve allows crankcase gases to be safely routed back into the intake system instead of building up and causing leaks, smoke, or poor engine performance. Without it, my engine could run rough and lose efficiency.
My experience has also shown that the grommet is just as important because it seals the PCV valve properly in place. It helps prevent vacuum leaks, keeps the valve stable, and makes sure the system works as it should. When the PCV valve or grommet wears out, I can notice issues like oil leaks, increased emissions, or a check engine light.
In short, I see the PCV valve and grommet as small parts with a big job. They protect the engine, improve performance, and help keep my vehicle running smoothly for a longer time.
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 whether the part matches my vehicle’s make, model, year, and engine type. Even small differences can affect fit and performance. I also make sure I’m buying the correct style, since some engines use a specific valve design and grommet shape.
Why the PCV Valve Matters to Me
I treat the PCV valve as an important engine part because it helps control crankcase pressure and reduce harmful buildup. When it works properly, my engine usually runs smoother and cleaner. If it fails, I may notice rough idling, oil leaks, poor fuel economy, or increased sludge.
Why I Pay Attention to the Grommet
I never overlook the grommet, because it helps seal the PCV valve in place. A worn or cracked grommet can cause vacuum leaks, which can lead to drivability problems. If I’m replacing the valve, I usually replace the grommet too, since it is often inexpensive and easier to change at the same time.
Material and Build Quality
I prefer parts made from durable materials that can handle heat, oil, and engine vibration. For the valve, I look for smooth operation and a solid internal mechanism. For the grommet, I want flexible but sturdy rubber or equivalent material that won’t harden too quickly.
OEM vs Aftermarket
I compare OEM and aftermarket options before I buy. OEM parts usually give me confidence in exact fit and reliability. Aftermarket parts can be a better value, but I make sure the brand has good reviews and a reputation for quality. I avoid choosing only by price, because a cheap part can cost me more later.
Signs I Need a Replacement
I consider replacing the PCV valve and grommet if I notice:
- Rough idle
- Oil leaks
- Excessive oil consumption
- Whistling or hissing sounds
- Sludge buildup
- Check engine light related to air/fuel issues
Installation Ease
I like parts that are easy to install without special tools. If the grommet is too stiff or the valve fit is too loose, installation can become frustrating. I always check whether the part comes with instructions or notes about lubrication and proper seating.
Price and Value
I try to balance cost with reliability. In my experience, the cheapest option is not always the best value if it wears out quickly. I usually compare a few options and look for a part that offers good durability at a fair price.
My Final Tip
Before I buy, I double-check compatibility and replace both the PCV valve and grommet together when possible. That gives me better peace of mind and helps me avoid repeat repairs.
Final Thoughts
I’ve found that the PCV valve and grommet may seem like small parts, but they play a big role in keeping the engine running smoothly. My takeaway is that checking them regularly can help prevent rough idling, oil leaks, and other costly problems. I always recommend replacing worn or brittle components early so the whole system stays reliable.
Author Profile
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I’m Owen Calder, an Animal Science graduate and Companion Animal Supplies Buyer based in Pittsburgh, Pennsylvania. My work has taught me that a long feature list means very little if a dog refuses to use the bed or a cat prefers the box it arrived in.
Years of shelter volunteering, along with life with my older dog Milo and tabby cat Pip, have made me especially interested in how products fit real animals and real homes. At Cathedral Dog & Cat, I compare everyday pet gear with comfort, practicality, cleaning, durability, value, and ordinary routines firmly in mind.
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