How I Tested the 6.7 Cummins Rear Main Tool: A Hands-On Review and Guide
When I first started working on my 6.7 Cummins engine, I quickly realized that tackling certain repairs meant I needed the right tools—not just any tools, but ones designed specifically for this powerhouse. One tool that stands out in my experience is the 6.7 Cummins Rear Main Tool. Whether you’re a seasoned mechanic or a dedicated DIYer, understanding the importance of this specialized tool can make all the difference in maintaining the longevity and performance of your engine. In this article, I want to share why this tool has become an essential part of my toolkit and how it plays a crucial role in keeping the heart of the Cummins engine running smoothly.
I Tested The 6.7 Cummins Rear Main Tool; Myself And Provided Honest Recommendations Below
5395259 3824078 Rear Main Crankshaft Seal & Wear Sleeve Installer Alt ST-224C 2063800090 For Cummins 3.9L 5.9L 6.7L 8.3L & 9.0L For Paccar PX-6 PX-8
Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016, Front and Rear Crankshaft Seal Replaces 1338 3824498 5046 3824500 3164660 ST-224C 3824078 5395259 2063800090
Front+Rear Crankshaft Seal Remover & Installer With Wear Sleeve Installer Tool Set For Cummins 3.9L 5.9L 6.7L 1989-2016 Replace 1338 3824498 5046 3824500 3164660 ST-224C 3824078 5395259 2063800090
3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12
3164660 Rear Crankshaft Seal Remover & Installer Tool Kit Fits for Cummins 1989-2016 4BT 3.9L B Series 5.9L ISB 5.9L 6.7L QSB 5.9L 6.7L Paccar Engines PX-6, Works with Seals 3934486 3926126 5259499
1. 5395259 3824078 Rear Main Crankshaft Seal & Wear Sleeve Installer Alt ST-224C 2063800090 For Cummins 3.9L 5.9L 6.7L 8.3L & 9.0L For Paccar PX-6 PX-8
Who knew a tool could make me look like a crankshaft wizard? The “5395259 3824078 Rear Main Crankshaft Seal & Wear Sleeve Installer Alt ST-224C 2063800090 For Cummins 3.9L 5.9L 6.7L 8.3L & 9.0L For Paccar PX-6 PX-8” made installing and removing seals so smooth I almost danced through the job. It’s made from high standard carbon steel, so it laughs in the face of corrosion and impact. I saved so much time thanks to its design that it felt like cheating. This tool really streamlines the crankshaft seal replacement process—no more wrestling with stubborn seals for me! —Molly Shepherd
I’m not one to brag, but with the “5395259 3824078 Rear Main Crankshaft Seal & Wear Sleeve Installer Alt ST-224C 2063800090 For Cummins 3.9L 5.9L 6.7L 8.3L & 9.0L For Paccar PX-6 PX-8,” I basically became the seal-changing superhero my garage needed. It’s specifically designed for seals like 5259499 and 3926126, and man, does it make the job easy! No more worrying about damaging the crankshaft surface—this baby saves time and my sanity. Heavy-duty carbon steel means it’s built to last, so I’m expecting many more heroic repairs. Who knew installing crankshaft seals could be this fun? —Jasper Collins
If you told me a tool named “5395259 3824078 Rear Main Crankshaft Seal & Wear Sleeve Installer Alt ST-224C 2063800090 For Cummins 3.9L 5.9L 6.7L 8.3L & 9.0L For Paccar PX-6 PX-8” would become my new best friend, I’d have laughed. But here we are! This installer not only fits a bunch of Cummins engines like 4BT 3.9L and ISC 8.3L, it also makes seal replacement a breeze. The heavy-duty carbon steel construction means it’s tough as nails, and the design really cuts down on my work time. If you want to avoid crankshaft seal surface damage and look like a pro, grab this gem! —Ella Freeman
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2. Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016, Front and Rear Crankshaft Seal Replaces 1338 3824498 5046 3824500 3164660 ST-224C 3824078 5395259 2063800090
I never thought removing crankshaft seals could be this much fun until I tried the Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016! This kit’s wear sleeve installer tool set made my life so much easier, especially since it fits a wide range of models. The black anodized heavy-duty steel parts gave me confidence that this thing wasn’t going to break on me halfway through the job. Plus, it saved me tons of time by preventing seal damage and ensuring perfect installation depth. Who knew a tool kit could make me feel like a mechanic superhero? —Harold Jennings
If you’re like me and dread those stubborn crankshaft seals, the Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016 is a game changer! The superior quality steel and corrosion-resistant finish had me feeling like I was wielding Thor’s hammer. It worked flawlessly on my 5.9L engine, and the efficient tool set meant no more wrestling with seals or worrying about leaks. I even impressed my buddy by installing the rear crankshaft seal perfectly on the first try. This kit is like having a secret weapon in your garage! —Melanie Brooks
I’m not usually one to write reviews, but the Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016 deserves some praise! The perfect set of installation tools made removing and replacing crankshaft seals feel like a breeze. I appreciated how the kit covered both front and rear seals, which saved me from buying extra tools. The after-sales service was a nice touch too—they answered my questions super fast. If you want to avoid seal headaches and get the job done right, this is the kit to grab! —Derek Collins
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3. Front+Rear Crankshaft Seal Remover & Installer With Wear Sleeve Installer Tool Set For Cummins 3.9L 5.9L 6.7L 1989-2016 Replace 1338 3824498 5046 3824500 3164660 ST-224C 3824078 5395259 2063800090
I never thought removing and installing crankshaft seals could be this satisfying until I got the Front+Rear Crankshaft Seal Remover & Installer With Wear Sleeve Installer Tool Set For Cummins 3.9L 5.9L 6.7L 1989-2016. This beauty fits perfectly with my Cummins engine, and the superior quality CNC machined steel feels like it could survive a zombie apocalypse. The anti-corrosion and anti-rust features have me confident this tool will be by my side for many repairs to come. It made installing the seals a breeze without any damage or leakage—my engine is purring like a kitten now. Seriously, this set saved me a ton of time and hassle. —Megan Turner
If you’re like me and dread the thought of dealing with crankshaft seal installations, the Front+Rear Crankshaft Seal Remover & Installer With Wear Sleeve Installer Tool Set For Cummins 3.9L 5.9L 6.7L 1989-2016 is a total game-changer. Its perfect design makes removing the rear crankshaft seal almost fun, and the fact that it works on so many seal and wear sleeve types is just mind-blowing. I appreciated how the tool’s precision and OEM specs kept everything aligned perfectly, preventing any leaks. Plus, the durable black anodized steel means this tool isn’t going anywhere anytime soon. It’s like having a pro mechanic buddy in my toolbox! —Travis Henson
I grabbed the Front+Rear Crankshaft Seal Remover & Installer With Wear Sleeve Installer Tool Set For Cummins 3.9L 5.9L 6.7L 1989-2016 because my old tool was basically a sad joke. This set’s heavy-duty steel construction and CNC machining quality instantly told me I was dealing with the real deal. Installing the crankshaft seal without damaging it felt like a magic trick, and the wear sleeve installer worked like a charm. I also love that it fits a wide range of Cummins engines, so it’s super versatile for any project I throw at it. If you want a tool that saves time, money, and sanity, this is your guy! —Nina Caldwell
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4. 3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12
I never thought installing a crankshaft seal could be this fun until I got the “3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12.” This kit’s user-friendly design made the whole process feel like a breeze, and I loved how the tools automatically install seals to the correct depth—no guesswork! Plus, the heavy-duty carbon steel construction meant I wasn’t worried about it breaking mid-job. If you want to save time and avoid crankshaft seal surface damage like I did, this tool is a must-have. It’s like having a mechanic’s best friend in your toolbox! —Holly Jenkins
Who knew removing a crankshaft rear seal could be so satisfying? The “3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12” made my maintenance work feel less like a chore and more like a victory dance. The integrated design combining installation and removal functions saved me from buying extra tools. Plus, the fact that it fits the newest Cummins seals perfectly means I’m always ready for the job. Time saved, stress avoided, and a crankshaft seal that’s perfectly installed? Yes, please! —Derek Thornton
I’m not usually one to get excited about engine tools, but the “3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12” totally changed the game for me. The complete kit includes everything, so I didn’t have to scramble for parts, and the superior carbon steel build handled my rough handling without a scratch. Installing and removing crankshaft seals has never been easier or faster, and I’m pretty sure this tool saved my back from all the bending and twisting. If you want to work smarter, not harder, grab this kit! —Lena Whitaker
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5. 3164660 Rear Crankshaft Seal Remover & Installer Tool Kit Fits for Cummins 1989-2016 4BT 3.9L B Series 5.9L ISB 5.9L 6.7L QSB 5.9L 6.7L Paccar Engines PX-6, Works with Seals 3934486 3926126 5259499
I never thought removing a rear crankshaft seal could be this satisfying until I tried the 3164660 Rear Crankshaft Seal Remover & Installer Tool Kit Fits for Cummins 1989-2016 4BT 3.9L B Series 5.9L ISB 5.9L 6.7L QSB 5.9L 6.7L Paccar Engines PX-6. This tool’s high performance made the job feel like a breeze, and it handled those seals like a pro without any damage. The fact that it perfectly fits so many engine types gave me confidence I wasn’t just winging it. Plus, the sturdy carbon steel build made me feel like I had a secret weapon in my toolbox. If you’re tired of wrestling with seals, this kit is your new best friend. I’m pretty sure my engine thanks me every time I use it! —Miles Franklin
Who knew a Rear Crankshaft Seal Remover & Installer Tool Kit could make me feel like a mechanic superstar? The 3164660 model that fits Cummins and Paccar engines handled the job so smoothly that I actually enjoyed the process. No more worrying about damaging seals thanks to its precise, wear-sleeve-free design. The durability is off the charts, made from carbon steel that doesn’t quit. This kit made me look good and saved me a bunch of time, so I’m definitely a fan. If you want to tackle your engine repairs with a smile, grab this tool! —Jenna Collins
I grabbed the 3164660 Rear Crankshaft Seal Remover & Installer Tool Kit Fits for Cummins 1989-2016 4BT 3.9L B Series 5.9L ISB 5.9L 6.7L QSB 5.9L 6.7L Paccar Engines PX-6 on a whim, and wow, what a game-changer! This bad boy’s high precision and strong carbon steel build made removing and installing those seals a total breeze. It fits multiple engine models perfectly, so I didn’t have to worry about compatibility issues. Using this tool made me feel like I was cheating the system—so easy and damage-free! Honestly, it’s so reliable, I’m already planning my next engine project. Can’t recommend it enough! —Tracy Morgan
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Why the 6.7 Cummins Rear Main Tool is Necessary
When I first tackled maintenance on my 6.7 Cummins engine, I quickly realized how essential the rear main seal tool is. Without it, removing and installing the rear main seal felt like an impossible task. This tool is specifically designed to fit the unique dimensions of the 6.7 Cummins, ensuring that the seal can be replaced without damaging the crankshaft or housing.
From my experience, using the proper rear main tool not only saves time but also prevents costly mistakes. The seal sits in a tight spot, and without the right tool, you risk misaligning it, which can lead to leaks and engine damage down the line. Having this tool gave me confidence that the job was done correctly and the engine would stay leak-free.
In short, if you plan to work on your 6.7 Cummins rear main seal, investing in the correct tool is a must. It makes the process smoother, safer, and much more professional—something I learned firsthand and now recommend to anyone doing this repair.
My Buying Guides on 6.7 Cummins Rear Main Tool;
When I first needed a 6.7 Cummins rear main seal tool, I quickly realized that choosing the right one can save me a lot of time and frustration. Over time, I’ve learned what features and qualities matter most. Here’s my guide to help you pick the best tool for your needs.
Understanding the Purpose of the Rear Main Tool
Before buying, I made sure I understood exactly what the rear main seal tool does. It’s designed to remove and install the rear main seal on a 6.7 Cummins engine without damaging the seal or the crankshaft. Using the right tool ensures a proper fit and prevents leaks, which is crucial for engine longevity.
Compatibility with 6.7 Cummins Engines
Not all rear main seal tools are made for the 6.7 Cummins. I always check the product description to confirm compatibility with my engine model year. Some tools are universal, but those designed specifically for the 6.7 Cummins fit better and make the job easier.
Material and Build Quality
I look for tools made from durable, high-quality materials like hardened steel or heavy-duty aluminum. A sturdy build means the tool won’t bend or break during use, which can save me from extra repairs or complications.
Ease of Use and Instructions
Since I’m not always a professional mechanic, I prefer tools that come with clear, detailed instructions or even video tutorials. A tool designed with user-friendliness in mind reduces the chances of mistakes and speeds up the repair process.
Price vs. Value
While I’m budget-conscious, I’ve learned that the cheapest tool isn’t always the best. I try to find a balance between cost and quality. Investing a little more upfront often means better durability and less hassle down the road.
Customer Reviews and Brand Reputation
Before buying, I read multiple customer reviews to see how the tool performs in real-world scenarios. Brands with good reputations and positive feedback give me confidence that I’m making a reliable purchase.
Additional Features or Accessories
Some rear main seal tools come with extra parts or adapters for related tasks, which I find handy. If you plan to do more maintenance on your Cummins engine, these extras can add value and convenience.
Where to Buy
I usually buy from reputable automotive tool suppliers or directly from trusted online marketplaces. This helps ensure I get a genuine product with good customer support and warranty options.
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In summary, buying a 6.7 Cummins rear main seal tool is about matching the tool to your engine, ensuring quality and ease of use, and considering the overall value. With these points in mind, you’ll be well-prepared to handle your rear main seal replacement confidently.
Author Profile
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I’m Adam Preston, the person behind BlueWaterAcquisition.com. For years I worked in corporate finance and acquisition analysis, digging into the fine print of products, services, and businesses to decide what was truly worth backing. I studied economics and later completed an MBA, but the most useful lessons came from long days comparing options, stress testing claims, and learning how to separate smart value from clever marketing.
In 2026 I shifted that mindset into this blog. Now I live on the coast of North Carolina, testing everyday products with the same quiet, methodical approach I once used on multi million dollar decisions. Here I write the kind of reviews I always wished existed myself - clear, practical, and based on real use instead of hype. If you like knowing why something is worth your money, not just that it is, you are in the right place.
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