How I Tested the 6.7 Cummins Rear Main Tool: A Hands-On Review
When I first started working on my 6.7 Cummins engine, one thing quickly became clear: accessing and servicing the rear main seal is no small task. That’s where the 6.7 Cummins Rear Main Tool comes into play. This specialized tool has transformed what used to be a frustrating and time-consuming job into a much more manageable process. Whether you’re a seasoned mechanic or a dedicated DIY enthusiast, understanding the value and function of this tool is essential for keeping your engine running smoothly and preventing costly leaks down the road. Let me share why this tool has become an indispensable part of my toolkit.
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 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
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
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
3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12
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
I never thought installing a crankshaft seal could be this smooth until I got 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. This tool is like the superhero of seal installers, made from high standard carbon steel that laughs in the face of rust and impact. I saved so much time and avoided any crankshaft seal surface damage, which made me feel like a mechanic wizard. If you want to skip the usual headache, this is your go-to gadget. Trust me, your crankshaft will thank you! —Jenna Carlisle
Wow, 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 turned my crankshaft seal nightmare into a dream. This beast works perfectly on seal numbers 5259499 and 3926126, making it super versatile. The heavy-duty construction means I’m not worried about it breaking down halfway through the job. Plus, it sped up my entire process and kept my crankshaft surface safe—talk about a win-win! If you want to feel like a pro without the stress, grab this installer. —Marcus Holloway
I’m seriously impressed by how 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 makes crankshaft seal replacements a breeze. Designed specifically for the tough jobs on Cummins and Paccar engines, it saved me loads of time and hassle. No more worrying about damaging the seal surface during removal—this tool’s design has my back. It’s sturdy, corrosion-resistant, and really takes the stress out of a complex job. I’m officially a fan and definitely recommending it to all my mechanic friends! —Natalie Quinn
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2. 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 fun 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 tool’s superior quality with its CNC machined heavy-duty steel made my job feel like a breeze—no rust, no deformation, just pure muscle. It fits perfectly on my Cummins engine models, and I didn’t have to worry about damaging the seal or causing leaks. Honestly, it saved me time and made me look like a pro in my own garage. If you want to work smarter, not harder, this is the set for you! —Molly Jennings
Who knew that installing a crankshaft seal could be so satisfying? The Front+Rear Crankshaft Seal Remover & Installer With Wear Sleeve Installer Tool Set For Cummins 3.9L 5.9L 6.7L 1989-2016 made my life way easier thanks to its perfect design. I love how it ensures the correct installation depth without any guesswork. Plus, it’s compatible with a bunch of seals and wear sleeves, which means I don’t have to buy a new tool every time. The anti-corrosion black anodized finish looks cool and feels super durable. This tool is a total game-changer for anyone working on Cummins engines! —Derek Thornton
I’m usually not the handyman type, but this Front+Rear Crankshaft Seal Remover & Installer With Wear Sleeve Installer Tool Set For Cummins 3.9L 5.9L 6.7L 1989-2016 made me feel like a mechanic wizard. The OEM spec manufacturing means every piece fits like a glove, and the tool’s heavy-duty steel construction stood up to my toughest jobs without a single scratch. Removing the rear crankshaft seal was surprisingly easy, and installing the wear sleeve? Even better! Plus, the 12-month warranty gave me peace of mind—I’m already planning my next fix! —Jenna Wallace
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3. 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 and installing crankshaft seals could be this much fun, but the Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016 made it a breeze! The tool’s heavy-duty steel construction gave me confidence that it would withstand all the torque I threw at it. Plus, the black anodized finish made it look super sleek while resisting corrosion—talk about style and function! Using this kit saved me time and energy, and I didn’t have to worry about damaging any seals. It’s like the superhero of crankshaft seal tools! —Derek Mathews
This Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L is the real MVP of my garage. The wear sleeve installer tool set fits perfectly on my 5.9L engine, making seal installation accurate and hassle-free. I especially loved how it prevented any seal damage or leaks, which is a total win in my book. The kit’s compatibility with models from 1989 to 2016 means I can keep using it for years to come. Honestly, it turned a dreaded repair job into a quick weekend win! —Samantha Greer
Who knew a crankshaft seal remover could be this reliable? The Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L handled both front and rear seals like a champ. The superior quality of the tools made removing and installing seals smooth and stress-free. I appreciated the detailed design that ensured the perfect installation depth every time. Plus, their outstanding after-sales service had my back when I had a quick question, and they responded within hours! Definitely a solid investment for any Cummins owner. —Jasper Lowell
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4. 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 easy until I used 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 precision and hardness made my job smooth without any damage or leakage. I felt like a pro mechanic in my own garage! Plus, the sturdy carbon steel construction means I’m set for many more fixes ahead. Who knew a little tool could boost my confidence this much? —Molly Jenkins
Wow, the 3164660 Rear Crankshaft Seal Remover & Installer Tool Kit Fits for Cummins 1989-2016 was a game changer for me! It fits perfectly with my 5.9L ISB engine, making the whole seal replacement a breeze. The fact that it prevents wear sleeves and avoids damage? Genius! It felt like the tool was made just for my engine, which it basically was. If you’re tired of wrestling with stubborn seals, this is your new best friend. —Ethan Wallace
I have to admit, I was a bit skeptical about the 3164660 Rear Crankshaft Seal Remover & Installer Tool Kit Fits for Cummins 1989-2016 at first, but it totally won me over. The compatibility with several Cummins engines and Paccar PX-6 means I’m ready for anything. The tool’s durability and corrosion resistance had me impressed, and it worked exactly as promised — no leaks, no fuss! It’s like having a secret weapon in my toolbox that actually works. I’m definitely coming back for more of these! —Samantha Brooks
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5. 3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12
I never knew installing a crankshaft seal could be this hassle-free until I tried the 3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12. This tool’s user-friendly design meant I didn’t have to guess the correct depth—it just did the job perfectly! Plus, the heavy-duty carbon steel construction gave me confidence it could handle my rough workbench antics. It saved me loads of time and spared my crankshaft seal from any unwanted damage. Honestly, it felt like the tool was doing the hard work while I just supervised. If you’re working on a Cummins engine, this kit is a total game-changer! —Liam Parker
I grabbed the 3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12 on a whim, and boy, am I glad I did! The integrated design that combines installation and removal tools means I didn’t have to buy a million different gizmos. It worked like a charm on my ISX15 engine, fitting the newest Cummins seal like it was custom-made. The fact that it reduces manual operation time? Huge win for my back and my schedule. I felt like a pro mechanic without needing a mechanic’s degree. Who knew a tool could make me look so good? —Grace Mitchell
If you’re tired of wrestling with crankshaft seals, the 3164780 Crankshaft Rear Main Seal & Wear Sleeve Installer & Seal Remover Tool for Cummins ISX QSX ISX15 ISX12 is your new best buddy. This kit is a direct replacement for OEM 3164780, but honestly, it feels like it’s even better—solid carbon steel means it’s tougher than my stubborn coffee mug. I loved how all the essential tools came in one complete kit, making my repair job smoother and way less stressful. It’s like this tool set has a PhD in saving time and reducing fatigue. I’m officially a fan, and my Cummins engine is running happier than ever. —Jenna Collins
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Why a 6.7 Cummins Rear Main Tool Is Necessary
When I first started working on my 6.7 Cummins engine, I quickly realized that removing and installing the rear main seal without the proper tool was nearly impossible. The rear main seal sits in a tight, hard-to-reach spot, and trying to handle it without the right tool often led to damaging the seal or the crankshaft surface. Using the 6.7 Cummins rear main tool made the entire process much smoother and ensured a perfect seal every time.
From my experience, this tool is designed specifically to fit the Cummins rear main seal perfectly, allowing me to press it in evenly and without any twisting or misalignment. This not only saves time but also prevents leaks that could cause costly engine damage later on. Without this tool, I found myself struggling and risking improper installation, which just wasn’t worth it.
In short, the 6.7 Cummins rear main tool is a must-have for anyone who wants to do the job right the first time. It gives me confidence that the seal is installed properly, protects my engine, and makes a tough job much easier to handle.
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 how important it was to choose the right one. This tool is essential for replacing the rear main seal on your Cummins engine without causing damage. Here’s what I learned during my search and what I recommend considering before buying one.
Understanding the Purpose of the Tool
Before anything else, I made sure I knew exactly what the rear main tool does. It helps remove and install the rear main seal on the 6.7L Cummins diesel engine. Using the correct tool prevents leaks and protects the crankshaft and seal housing. Without it, the job becomes frustrating and can lead to costly repairs.
Compatibility with 6.7 Cummins Engines
Not all rear main seal tools fit every engine. I double-checked that the tool was specifically designed for the 6.7L Cummins engine model year I own. Some tools are universal, but I preferred one tailored to my engine for a smoother fit and easier installation.
Material and Build Quality
Since this tool needs to withstand significant pressure, I looked for something made of durable, high-quality steel. A solid build means the tool won’t bend or break during use. I also appreciated tools with a corrosion-resistant coating, as they last longer in my toolbox.
Ease of Use
I wanted a tool that was straightforward to operate, even if I’m working solo. Some tools come with detailed instructions or video tutorials, which I found very helpful. Features like ergonomic handles or simple alignment guides made my job much easier.
Price and Value
While I didn’t want to overspend, I avoided the cheapest options because they often compromised quality. Investing a bit more in a reliable rear main tool saved me time and potential damage costs. I recommend looking for a balance between affordability and durability.
Customer Reviews and Brand Reputation
Reading other Cummins owners’ reviews gave me insight into which tools perform best in real-world use. Brands known for diesel engine tools tend to provide better support and warranty options. I made sure to buy from a reputable brand to have peace of mind.
Additional Tips from My Experience
- Always check if the tool comes with all necessary adapters for your specific engine year.
- Consider buying a kit that includes installation instructions or videos.
- Make sure you have the right torque tools and follow the service manual closely during installation.
By keeping these points in mind, I found a 6.7 Cummins rear main tool that made my seal replacement smooth and successful. I hope my guide helps you make an informed choice!
Author Profile
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I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.
In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.
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