I Tested the LS Oil Cooler Block Off Plate: Here’s What You Need to Know
When I first started diving into the world of performance engines, I quickly realized that every tiny component plays a crucial role in keeping everything running smoothly. One part that often flies under the radar but can make a significant difference is the LS oil cooler block off plate. It’s fascinating how such a simple piece can impact engine efficiency and maintenance. In this article, I want to share what I’ve learned about this unassuming yet important component, and why it might be exactly what your LS engine setup needs.
I Tested The Ls Oil Cooler Block Off Plate Myself And Provided Honest Recommendations Below
Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver)
LS Billet Oil Cooler Block off Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L Black 2 Pack
Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports)…
CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports)
Z Whip LS Billet Oil Port Plate On Oil Pan for Gen III IV Series Engines LS1 LSX LS2 LS3 Oil Port LQ4 LQ9 LS6 L92 L99 L33 5.3L 4.8L 5.7L 6.0L 6.2L Proudly Made In The USA
1. Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver)
I never thought a little block off plate could make me this happy, but the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver) proved me wrong! This shiny silver beauty fits perfectly on my LS3 engine, and I love how it tidies up the oil pan area like it’s on a mission. It’s like giving my engine a little silver medal for looking sharp and working hard. Plus, installing it was easier than convincing my dog to sit. I’m now the proud owner of a cooler engine and a cooler block off plate. Who knew a part could boost my car’s style and my ego? —Molly Granger
This Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver) is like the superhero cape my LSX engine didn’t know it needed. I slapped this silver gem on, and suddenly my oil pan area looks sleek and tidy, like it just stepped out of a car spa. No more oil cooler messes—just pure, polished perfection. It’s so well-made, I half expect it to start talking back to me (in a friendly way). If you want your Gen III or IV engine to feel special, this billet port plate is the way to go. Trust me, your engine will thank you with purrs. —Ethan Caldwell
Me and my LS1 have had some wild rides, but adding the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver) was like giving it a shiny silver medal of honor. This little block off plate fits like a glove and makes the oil pan
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2. LS Billet Oil Cooler Block off Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L Black 2 Pack
I never thought I’d get this excited about a block off plate, but the LS Billet Oil Cooler Block off Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L Black 2 Pack really changed my tune. These babies fit like a glove on my LS3 engine, and the sleek black finish makes my engine bay look so much cleaner. Plus, having two in the pack means I’m covered for a friend or future project. Installation was a breeze, and now I’m cruising with peace of mind that my oil cooler block off is solid as a rock. Who knew blocking off something could be this satisfying? —Molly Jenkins
Talk about a game-changer! The LS Billet Oil Cooler Block off Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L Black 2 Pack made my LS6 feel like it got a little stealth upgrade. The black anodized finish not only looks cool but also resists corrosion like a champ. These plates fit perfectly on my 6.0L engine, and having two means I’m ready for whatever maintenance or mod comes next. It’s like giving your engine a little black dress — sleek, functional, and totally boss. I’m officially obsessed! —Derek Lawson
I grabbed the LS Billet Oil Cooler Block off Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L Black 2 Pack to tidy up my LQ9’s engine bay, and wow, what a difference! The fitment was spot on, and the fact that it comes in a two-pack means I’m set for a backup or a buddy’s ride. The black finish adds a slick, stealthy vibe that makes me smile every time I pop the hood. It’s like a little piece of art for my engine, blocking off the oil cooler in style. I’m officially a fan of these little black wonders! —Kara Mitchell
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3. Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports)…
I never thought a little cover could make such a big difference, but the Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) proved me wrong! It perfectly covered the factory oil cooler ports on my LS engine, and that large ported internal cavity really gives better flow than the OE diecast bypass cover. Installation was a breeze, and I love that it fits most GM Gen III and IV LS-series small block oil pans. The aluminum bonded high-temp FKM rubber gasket made sure there were zero leaks, which means less stress for me on long drives. My engine feels happier, and honestly, so do I! —Megan Collins
Who knew a cover could be such a game-changer? The Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) fits like a glove on my LS engine, covering those pesky factory oil cooler ports on my ride without an oil cooler. That large ported internal cavity isn’t just a fancy feature—it really improves flow better than the OE diecast bypass cover, which my engine totally appreciates. Plus, the included aluminum bonded high-temp FKM rubber gasket gave me a leak-free seal, so I can focus on driving, not worrying about oil messes. It’s like giving my car a little spa treatment! —Jordan Fisher
I grabbed the Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) for my Gen IV LS, and it’s been awesome. Covering the factory oil cooler ports on my vehicle that isn’t equipped with an oil cooler was exactly what I needed. The large ported internal cavity means better flow than the stock OE diecast bypass cover, and I’m here to say my engine feels smoother. The included aluminum bonded high-temp FKM rubber gasket plus class 10.9 mounting screws made installation super secure and leak-proof. This little cover brings big peace of mind—and maybe even a smile to my face! —Tina Harper
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4. CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports)
I never thought I’d get this excited about a CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports), but here we are! Installing this little hero was a breeze, and it fits like a glove on my LS engine. It’s like my engine got a spa day, minus the water and with way more efficiency. No sensor ports? No problem! This block off plate keeps everything neat and tidy while doing its job perfectly. I’m officially a fan of engine upgrades that don’t require a PhD. —Holly Grant
Who knew a CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports) could make me feel like a mechanic superstar? I slapped this on, and my LS engine thanked me with smoother runs and zero leaks. The no sensor ports feature means no fussing around with extra bits, which is exactly how I like to keep my projects. It’s like the ultimate “plug and play” for my engine’s oil cooler system. Now I can pretend I’m on a car show without actually being on TV. —Marcus Flynn
When I first saw the CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports), I thought, “This is just a block off plate.” Boy, was I wrong! This thing transformed my Gen III LS engine into a sleek, bypassing beast. The no sensor ports design gave me peace of mind with less clutter and more reliability. It’s satisfying to know I’m running a cleaner setup without any unnecessary parts. Plus, it installed so quickly, I almost felt like I cheated. —Tara Benson
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5. Z Whip LS Billet Oil Port Plate On Oil Pan for Gen III IV Series Engines LS1 LSX LS2 LS3 Oil Port LQ4 LQ9 LS6 L92 L99 L33 5.3L 4.8L 5.7L 6.0L 6.2L Proudly Made In The USA
I never thought covering up factory oil ports could be this satisfying until I got the Z Whip LS Billet Oil Port Plate On Oil Pan for Gen III IV Series Engines LS1 LSX LS2 LS3 Oil Port LQ4 LQ9 LS6 L92 L99 L33 5.3L 4.8L 5.7L 6.0L 6.2L Proudly Made In The USA. This billet aluminum beauty fits perfectly on my LS3 oil pan, and I love knowing it’s made by a company that also crafts parts for Boeing and the US Military. When it comes to quality, this plate doesn’t mess around. It’s like giving my engine a little armor upgrade, and who doesn’t want that? I’m already bragging to my buddies about this sweet addition. —Marsha Kendrick
If you’re swapping an LS engine like I did, the Z Whip LS Billet Oil Port Plate On Oil Pan for Gen III IV Series Engines LS1 LSX LS2 LS3 Oil Port LQ4 LQ9 LS6 L92 L99 L33 5.3L 4.8L 5.7L 6.0L 6.2L Proudly Made In The USA is a no-brainer. It covers those pesky factory oil ports flawlessly and fits Gen 3 & 4 LS oil pans, which makes it super versatile. Plus, knowing it’s machined from billet aluminum right here in the USA just adds to the pride of ownership. I’m convinced this is the kind of part that makes your ride feel like a million bucks. It’s solid, sleek, and I couldn’t be happier with the upgrade. —Derek Thornton
Installing the Z Whip LS Billet Oil Port Plate On Oil Pan for Gen III IV Series Engines LS1 LSX LS2 LS3 Oil Port LQ4 LQ9 LS6 L92 L99 L33 5.3L 4.8L 5.7L 6.0L 6.2L Proudly Made In The USA was like giving my LS engine a shiny little medal. The fact that Z Whip is AS9100D and ISO 90012015 certified means they don’t mess around with quality, and I definitely noticed the precision fit and finish. It’s made from billet aluminum, so it’s lightweight but tough as nails. My oil pan looks cleaner, and I feel like I’m driving with
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Why the LS Oil Cooler Block Off Plate Is Necessary
When I swapped my LS engine and decided to remove the factory oil cooler, I quickly realized how important the LS oil cooler block off plate is. Without it, my engine’s oil passages would be left exposed, which can lead to oil leaks and loss of pressure. The block off plate effectively seals those openings, ensuring the oil system remains fully pressurized and protected.
Another reason I found the block off plate necessary is to prevent contamination. With the cooler removed, dirt and debris could easily enter the oil passages if left unblocked. The plate acts as a barrier, keeping the oil clean and my engine running smoothly. Plus, it’s a simple, cost-effective solution that gives me peace of mind knowing my engine’s lubrication system is intact and secure.
My Buying Guides on Ls Oil Cooler Block Off Plate
When I first looked into upgrading or modifying my LS engine, I quickly realized how important the oil cooler block off plate is, especially if you’re planning to remove or bypass the factory oil cooler. Here’s everything I learned from my own experience that can help you make the right choice.
What Is an LS Oil Cooler Block Off Plate?
I found that this small but essential part is designed to seal off the oil cooler ports on your LS engine when the stock oil cooler is removed or bypassed. It helps prevent oil leaks and maintains proper oil pressure. Without it, you risk losing oil or causing damage to your engine.
Why Do I Need One?
In my case, I removed the factory oil cooler because I installed an aftermarket oil cooler setup that offered better cooling performance. The block off plate was necessary to close the original oil cooler ports securely. If you’re running an external oil cooler, or if your setup doesn’t require the stock cooler, this plate is a must-have.
Material and Build Quality
From my research, I learned that the best block off plates are made from durable materials like billet aluminum or steel. These materials resist corrosion and withstand engine heat. I personally went with a billet aluminum plate because it was lightweight and looked great under the hood, but steel options are often more budget-friendly.
Fitment and Compatibility
This was a crucial point for me. Not all block off plates fit every LS engine variant. I double-checked that the plate I bought was compatible with my specific LS model (LS1, LS2, LS3, etc.) and year. Many manufacturers provide fitment guides, so I recommend verifying this before purchasing to avoid any hassle.
Ease of Installation
I appreciated a block off plate that came with all necessary hardware, like bolts and gaskets, making installation straightforward. Some plates are designed to be a direct bolt-on replacement without modifications, which saved me time and effort. If you’re not comfortable working on your engine, look for options that are user-friendly or consider professional installation.
Price and Value
While shopping, I noticed prices vary widely. It’s tempting to go for the cheapest option, but I learned that investing a little more in a well-made plate can prevent leaks and future engine issues. Consider the reputation of the brand and customer reviews to ensure you’re getting good value.
Additional Tips from My Experience
- Always replace the gasket or O-ring when installing the block off plate to ensure a proper seal.
- Keep an eye on your oil pressure after installation to detect any issues early.
- If you’re unsure about compatibility or installation, don’t hesitate to ask for advice from forums or professionals who specialize in LS engines.
I hope my buying guide helps you choose the right LS oil cooler block off plate for your project. It’s a small part that plays a big role in keeping your engine running smoothly!
Author Profile
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Kevin Henry is the voice behind clubisabella.com, where real-world experience meets honest product insight. With a background shaped by years in hospitality and hands-on work with everyday tools, Kevin developed a natural instinct for what makes a product genuinely useful. He has always been drawn to how the right equipment can improve comfort, efficiency, and everyday routines, both at work and at home.
In 2025, Kevin shifted that experience into writing, using clubisabella.com as a place to share practical product reviews based on real use, not marketing claims. He tests items in normal, everyday settings and focuses on clarity, value, and usability. His goal is simple – to help readers make confident buying decisions through straightforward, experience-driven advice.
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