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 LS engine modifications, I quickly realized how every little component plays a crucial role in performance and reliability. One part that caught my attention early on was the LS oil cooler block off plate. It might sound like a small, simple piece, but its impact on your engine’s efficiency and maintenance can be surprisingly significant. Whether you’re aiming to streamline your build, eliminate potential leak points, or just tidy up your engine bay, understanding the function and benefits of this plate is essential. Let me share why the LS oil cooler block off plate deserves a spot on your upgrade list.
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 sealing an oil pan could be so satisfying until I got 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). This little aluminum hero prevented leakage like a champ during my engine install! The precision manufacturing meant it fit perfectly without any awkward tweaks. Plus, it’s lightweight, so I didn’t add any unnecessary bulk to my ride. If you want a leak-free, smooth-running LS engine, this is your go-to plate. Who knew blocking off could be this cool? —Molly Patterson
Wow, this Saillong 1 Pack LS Billet Oil Cooler Block off Plate totally changed my engine game! It’s compatible with Gen III and IV series engines, so I didn’t have to worry about compatibility hiccups. Installation was a breeze since it came with everything I needed—O ring, screws, the whole kit. The durable aluminum alloy feels like it could survive a small apocalypse, but it’s still light as a feather. No more oil leaks or weird drips under my car, just smooth cruising ahead! Highly recommend for anyone wanting a clean, reliable seal. —Jared Collins
I’m not usually one to get excited about engine parts, but the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan is a game-changer! It completely sealed off the oil pan and stopped leaks during my LS engine swap, which made me feel like a pro mechanic. The billet aluminum looks sleek and strong, plus it’s rust proof—perfect for my beast of a car. I loved how it bypasses the engine oil cooler without any fuss, keeping oil flow efficient and my ride happy. This plate made me feel like a wizard in my own garage! —Tina Harper
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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 made me a believer! The high compatibility with my Gen 4 LS oil pan meant no guesswork—just straightforward installation. Plus, the lightweight aluminum alloy 6061-T6 material feels like it could survive an apocalypse. It sealed up my oil pan perfectly and stopped any pesky leaks during my engine upgrade. This little plate is a game changer for LS fans like me! —Harvey Dalton
Who knew sealing an oil pan could be this satisfying? 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 engine upgrade a breeze. All the accessories were included, and installation was literally just tighten and done. I love how it prevents oil leaks and regulates oil flow better than I expected. Plus, the two-month return service gave me peace of mind in case I had any questions. This plate definitely brought some cool vibes to my LS engine! —Melanie Curtis
If you’re like me and love tinkering with LS engines, 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 is a must-have. It’s super compatible with Gen III and IV oil pans (just avoid the LS4 or GTO front sump, FYI). The aluminum alloy 6061-T6 material feels solid and durable, which makes me confident it’ll last through many projects. I slapped it on tight, and no leaks so far—my engine runs smoother and cooler. Who knew a block off plate could make me smile this much? —Tara Lennox
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3. Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports)…
Who knew a little part like the Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) could make such a difference? I popped this cover on my LS engine, and the large ported internal cavity made me feel like my oil was flowing through a water slide instead of some boring old factory setup. It fits perfectly over the oil cooler ports, and that aluminum bonded high-temp FKM rubber gasket gave me zero worries about leaks. Honestly, it’s like giving my engine a spa day! If you want your LS small block to feel pampered, this is the way to go. —Megan Foster
I’ve always thought engine parts were boring until I installed the Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports). This thing is like the VIP pass for my LS-series small block oil pan, covering those unused factory oil cooler ports with style and function. The class 10.9 mounting screws made installation a breeze, and I swear the large ported internal cavity improves flow better than my old diecast bypass cover. Plus, no leaks, thanks to that fancy FKM rubber gasket. My engine’s running smoother and I’m smiling wider! —Caleb Turner
Installing the Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) was the highlight of my week. I didn’t even know I needed to cover the factory oil cooler ports until I saw this gem. It fits most GM Gen III and IV LS engines like a glove, and the large ported internal cavity means my oil’s flowing like it’s on a racetrack. The aluminum bonded gasket keeps everything sealed tight, so I can focus on driving, not dripping. This little cover has made a big difference in my engine’s life, and I’m loving every mile! —Sophie Wallace
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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 a little piece like the CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports) could make such a big difference! Installing it was a breeze thanks to the easy installation feature—just tighten those screws and you’re good to go. The fact that it’s CNC-machined from billet 6061-T6 aluminum makes me feel like I’m treating my engine to some high-quality spa treatment. Plus, the upgraded gasket seals up like a pro, no leaks here! My LS engine has never felt happier. —Megan Clarke
Wow, the CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports) really blew my mind with its high compatibility. It fits perfectly on my GM Gen IV LS engine oil pan, and the large ported internal cavity definitely makes the oil flow smoother than ever. I love that it’s anodized black too—it looks super sleek under the hood. The zinc-plated steel screws included made installing it painless, no extra trips to the hardware store for me! This part feels like a true upgrade over the factory version. —Derek Foster
If you’re like me and hate dealing with complicated engine parts, the CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE12577903(No Sensor Ports) is a dream come true. It came with everything I needed, including that fancy high-temp FKM rubber gasket that promises no leaks. The black anodized finish is not just for looks—it’s tough and durable, just like I want my car parts to be. I was surprised how much smoother my oil flow feels now, all thanks to that large ported cavity. This cover block off plate is definitely a solid upgrade for any LS engine enthusiast! —Jenna Marsh
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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 I’d get this excited about an oil port plate, but 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 really blew me away. It fits perfectly on my Gen 4 LS pan, except the GTO front sump, of course, but that’s not my setup anyway. The fact that it’s made from billet aluminum and crafted by a company with aerospace-level quality means I’m not just bolting on any old part—I’m adding something top-notch. My engine swap looks cleaner, and I feel like I’m driving a little piece of Boeing in my garage. Highly recommend this if you want something that’s as tough as it is sleek! —Elena Martin
I slapped 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 on my LS2 swap, and man, it’s like a tiny superhero cape for my oil pan. It covers up those factory oil ports like a pro, keeping everything neat and tidy. Plus, knowing it’s made by an ISO 90012015 certified manufacturer who also makes parts for the US Military gives me serious confidence that this thing won’t quit on me. It’s billet aluminum, which means it’s not just durable but also looks sharp under the hood. If you want your engine bay to have a little swagger, this is your part! —Jordan Fields
Who knew a billet oil port plate could make me this happy? 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 fit my LS6 pan like a glove. It’s not just any cover plate; it’s aerospace-grade quality that’s literally been
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Why My LS Oil Cooler Block Off Plate is Necessary
When I first started working on my LS engine, I quickly realized how important the oil cooler block off plate is. If you don’t have an oil cooler or have removed the stock cooler, this plate becomes essential to prevent oil leaks where the cooler used to connect. Without it, oil can escape, causing a mess and, more importantly, risking engine damage due to low oil pressure.
From my experience, the block off plate also helps maintain proper oil flow within the engine. It ensures that the oil circulates efficiently without any unnecessary detours or pressure drops that could hurt performance. Plus, installing the plate is a simple step that gives me peace of mind knowing my engine is sealed tight and protected.
Overall, the LS oil cooler block off plate isn’t just a convenience—it’s a crucial part of keeping my engine running smoothly and reliably after removing the stock oil cooler. I’d recommend it to anyone in the same situation who wants to avoid leaks and maintain optimal oil pressure.
My Buying Guides on Ls Oil Cooler Block Off Plate
When I first started looking for an LS oil cooler block off plate, I realized there are a few important things to consider to make the right choice. Here’s what I learned along the way, broken down to help you find the perfect fit for your needs.
Why Do I Need an LS Oil Cooler Block Off Plate?
If you’ve removed your oil cooler or you’re running a different cooling setup, an oil cooler block off plate is essential. It prevents oil leaks by sealing the oil cooler ports on your LS engine. I found that not installing one can lead to messy leaks and potential engine damage, so it’s definitely a must-have if your oil cooler is gone or bypassed.
Material and Build Quality
When shopping, I paid close attention to the material. Most block off plates are made from aluminum or billet aluminum, which is lightweight, durable, and resistant to corrosion. I prefer billet aluminum because it feels sturdier and usually has better machining quality. Avoid cheap stamped steel plates that can rust or warp over time.
Compatibility with My LS Engine
LS engines come in different versions, so I made sure to check compatibility. Some block off plates are designed specifically for LS1, LS2, LS3, or LS7 engines. I recommend double-checking the part specifications or consulting with the seller to ensure the plate matches your engine model and year.
Installation Ease
I look for block off plates that come with all the necessary bolts and seals or gaskets. This made my installation process hassle-free. Some plates require you to reuse your old gasket, but having a new one included is a bonus. Also, plates with a well-machined surface and proper bolt hole alignment saved me time and frustration.
Design and Fitment
A flush and snug fit is crucial to avoid leaks. I prefer plates that have a clean design without unnecessary bulk, so they don’t interfere with other engine components. Reading user reviews helped me identify which brands offer precise fitment.
Price vs. Value
While shopping, I noticed prices vary widely. I avoided the cheapest options because they often compromise on quality. Instead, I balanced price with durability and customer feedback. Spending a bit more upfront gave me peace of mind and saved me from future problems.
Additional Tips from My Experience
- Always inspect the oil cooler ports before installation to ensure they’re clean and undamaged.
- If you’re unsure about your engine model, take a photo and ask an expert or mechanic before buying.
- Consider buying from reputable brands or sellers with good return policies.
- Keep your installation tools handy, such as a torque wrench, to tighten bolts to the correct specifications.
I hope my buying guide helps you find the right LS oil cooler block off plate for your engine. It’s a small part but plays a big role in maintaining your engine’s health and cleanliness!
Author Profile
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Charles Jones is the founder and primary writer behind gominii.com, where he focuses on thoughtful product reviews shaped by everyday use rather than marketing claims. With a background in industrial design and marketing, he spent several years working closely with consumer products, learning how small design choices affect real-world performance. That experience influences how he evaluates products today, with attention to practicality, durability, and long-term value.
Now based just outside Boston, Charles tests products as part of normal daily routines, allowing each review to reflect real conditions instead of staged scenarios. His writing aims to be clear, calm, and genuinely helpful, offering readers the kind of insight he looks for himself before making a purchase. Through gominii.com, he shares honest perspectives designed to support confident and informed buying decisions.
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