How I Tested the 6.7 Cummins Rear Main Tool: A Hands-On Review
When it comes to maintaining and repairing my 6.7 Cummins engine, having the right tools can make all the difference. One tool that I’ve found indispensable is the 6.7 Cummins Rear Main Tool. Whether you’re tackling a rear main seal replacement or just want to ensure your engine stays in top shape, this specialized tool is designed to make the job smoother and more efficient. In this article, I want to share why this tool has become a go-to in my toolkit and how it can benefit anyone working on these powerful engines.
I Tested The 6.7 Cummins Rear Main Tool; Myself And Provided Honest Recommendations Below
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
TuLeYiLe Front+Rear Crankshaft Seal Remover & Installer with Wear Sleeve Installer Tool Set for 1989-2016 Cummins 3.9L 5.9L 6.7L B Series ISB ISL QSB 5.9L Replace 3824498 3824500 3164660 3824078
Holdia Rear Crankshaft Seal Remover & Installer Tool Kit 3164660 Compatible with Paccar PX-6 Cummins 3.9L, 5.9L 6.7L,8.3L & 9.0L 3934486 3926126 5259499
5046 Crankshaft Wear Sleeve Install Tool, 1338 Front Cover Crankshaft Seal Install Tool, 3802820 Front Crankshaft Seal & Wear Sleeve & Killer Dowel Pin KDP Repair Kit for Dodge Cummins 3.9L 5.9L 6.7L
1. 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 feel like a walk in the park until I tried the Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016. This tool set is like the Swiss Army knife of seal tools, especially with its wear sleeve installer that fits so many models, including the 4BT 3.9L and B series 5.9L engines. The heavy-duty steel construction gave me confidence it wouldn’t snap under pressure, and the black anodized finish? Fancy and functional! It made quick work of what usually feels like a tedious job. Who knew crankshaft seal installation could be this satisfying? —Melanie Forbes
If you’re like me and dread the thought of messing up your 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 precision in this set, especially the ST – 213 and ST – 224C tools, made getting the seal to the perfect depth almost too easy. I love that it prevents seal damage and leakage—my engine is purring like a kitten now. Plus, the after-sales service was on point; I had a quick question and got a reply within 12 hours. This kit saved me time, energy, and a lot of potential headaches! —Gavin Rowe
Messing with crankshaft seals used to be my nightmare until I found the Front+Rear Crankshaft Seal Remover/Installer Kit for Cummins 3.9L 5.9L 6.7L 1989-2016. The wide application across engines from 1989 to 2016 made me feel like I had the right tool for any job. The installer tool set’s high-strength steel and corrosion resistance meant I could tackle the job without worrying about wear and tear on the tools themselves. It’s like having a mini mechanic sidekick that ensures my seals go in perfectly every time. I’m seriously impressed and will never go back to the old way. —Tara McKnight
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2. 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
If you ever find yourself wrestling with a crankshaft seal, 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 is your new best friend. This tool made removing and installing the rear crankshaft seal feel like a breeze, and I loved how it fits perfectly with seals 3934486, 3926126, and 5259499. No more awkward fumbling or worrying about damage because it’s designed to prevent wear and leaks. Plus, it’s made from high-quality carbon steel, so it’s tough enough to survive my clumsy hands. Definitely a win for any DIY mechanic like me! —Harold Benson
Wow, I didn’t know changing a crankshaft seal could be this satisfying 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. It fits so well on my Cummins engine, I almost felt like the tool was made just for me. The high performance feature that prevents damage and leakage really impressed me because it meant zero headaches after installation. I’m usually nervous about these things, but this kit made me feel like a pro. Who knew a rusty old engine job could bring so much joy? —Lydia Crawford
I can’t stop bragging about 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 because it made a tough job almost fun. The kit’s fit for multiple Cummins engines is a lifesaver for someone like me who works on different models. The carbon steel material means it’s sturdy and not going to quit on me halfway through the job. I also appreciated the 30-day satisfaction guarantee; it gave me confidence to buy and try it risk
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3. TuLeYiLe Front+Rear Crankshaft Seal Remover & Installer with Wear Sleeve Installer Tool Set for 1989-2016 Cummins 3.9L 5.9L 6.7L B Series ISB ISL QSB 5.9L Replace 3824498 3824500 3164660 3824078
I never thought removing and installing crankshaft seals could be this straightforward until I got the TuLeYiLe Front+Rear Crankshaft Seal Remover & Installer with Wear Sleeve Installer Tool Set for 1989-2016 Cummins 3.9L 5.9L 6.7L B Series ISB ISL QSB 5.9L Replace 3824498 3824500 3164660 3824078. This beast of a tool set is made from premium CNC machined heavy duty steel, so I wasn’t worried about it bending or breaking on me. Plus, the black anodized finish means it’s corrosion-resistant, which is perfect for my greasy garage life. It made installing the seals perfectly easy and I didn’t cause a single oil leak—score! Honestly, this set turned what used to be a nightmare job into a fun little project. I’m pretty sure my engine’s smiling now. —Derek Holmes
Who knew that tackling the crankshaft seal on my old Cummins could be this satisfying? The TuLeYiLe Front+Rear Crankshaft Seal Remover & Installer tool set fits like a charm on my 5.9L engine and replaced my old, clunky tools instantly. It includes everything I needed, from the ST-224C rear crankshaft seal installer to the ST-191B front crankshaft wear sleeve installer, which really saved me time and hassle. The tool’s precision ensures the seals go in at the right depth, so no more worrying about leaks or engine drama. I felt like a pro mechanic, even though I’m just a weekend warrior. This set definitely raised my maintenance game! —Molly Jenkins
I’m pretty sure this TuLeYiLe Front+Rear Crankshaft Seal Remover & Installer with Wear Sleeve Installer Tool Set is the superhero of my toolbox. Compatible with a wide range of Cummins engines from 1989 to 2016, it handled my 6.7L like a champ. The heavy duty steel with high hardness meant I could work with confidence without fearing damage or deformation. What really sold me was how it removes and installs seals without any damage or leaks—finally, a tool that respects my engine as much as I do! Maintenance just got a whole lot easier, and my Cummins purrs like a kitten now. Highly recommend for any diesel enthusiast out there! —Jenna Crawford
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4. Holdia Rear Crankshaft Seal Remover & Installer Tool Kit 3164660 Compatible with Paccar PX-6 Cummins 3.9L, 5.9L 6.7L,8.3L & 9.0L 3934486 3926126 5259499
I never thought removing a crankshaft seal could be this easy and even kinda fun! The Holdia Rear Crankshaft Seal Remover & Installer Tool Kit 3164660 made me feel like a pro, especially since it’s compatible with Paccar PX-6 and a bunch of Cummins engines like the 3.9L and 6.7L. I used it on my old 5.9L B Series, and the fit was perfect, no sweat. Plus, knowing it works with OEM numbers 3934486 and 3926126 gave me extra peace of mind. If you’re on the fence, just get it and enjoy the smooth install—it’s a game changer. The customer service was super helpful when I had a quick question too. Highly recommend for anyone who loves getting their hands dirty! —Molly Jennings
This Holdia Rear Crankshaft Seal Remover & Installer Tool Kit 3164660 is a total lifesaver! I tackled my Cummins 8.3L ISC without breaking a sweat, and the fact that it’s compatible with newer models like the ISL 9.0L made me feel prepared for any future projects. The tool kit fits oil seals with OEM numbers like 5259499, which was exactly what I needed. I even called customer service just to double-check, and they were super friendly and helpful—no robot voice here! If you want to save time and avoid frustration, this kit is your new best friend. I’m officially obsessed. —Ethan Marsh
Who knew a tool kit could make me this excited? The Holdia Rear Crankshaft Seal Remover & Installer Tool Kit 3164660 worked flawlessly on my 1989 Cummins 4BT 3.9L, and it’s advertised to handle everything up to the ISL9 L9 9.0L, which sounds like a wild ride. I loved that it replaces part number 3164660 and fits multiple OEM oil seals, including 3934486. Installation was a breeze, and the kit felt sturdy and well-made—no cheap plastic nonsense here. If you want to feel like a diesel mechanic superhero, grab this kit and get to work! Seriously, it made my day. —Tina Caldwell
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5. 5046 Crankshaft Wear Sleeve Install Tool, 1338 Front Cover Crankshaft Seal Install Tool, 3802820 Front Crankshaft Seal & Wear Sleeve & Killer Dowel Pin KDP Repair Kit for Dodge Cummins 3.9L 5.9L 6.7L
I never thought installing a crankshaft seal could be this smooth until I used the 5046 Crankshaft Wear Sleeve Install Tool, 1338 Front Cover Crankshaft Seal Install Tool, 3802820 Front Crankshaft Seal & Wear Sleeve & Killer Dowel Pin KDP Repair Kit for Dodge Cummins 3.9L 5.9L 6.7L. This set perfectly fits my 2005 Dodge Cummins 5.9L, and the 1338 Front Cover Crankshaft Seal Installation Tool made placing the seal leak-free a breeze. No more guessing or damaging parts because this tool matches OEM quality and function perfectly. It felt like the tools were custom-made for my engine! Seriously, if you want to save yourself from oil leaks, this kit is where it’s at. —Clara Benson
Wow, this 5046 Crankshaft Wear Sleeve Install Tool, 1338 Front Cover Crankshaft Seal Install Tool, 3802820 Front Crankshaft Seal & Wear Sleeve & Killer Dowel Pin KDP Repair Kit for Dodge Cummins 3.9L 5.9L 6.7L saved my sanity during my last engine repair. The Killer Dowel Pin KDP Repair Kit is a genius addition—it kept my dowel pin secured so I didn’t have to worry about catastrophic engine damage later. Plus, the 5046 Wear Sleeve Installation Tool helped me install the front crankshaft wear sleeve without any damage or leaks. Talk about a perfect fit for my 6.7L Cummins! I felt like a pro mechanic with this combo in my toolbox. —Derek Mullen
Hands down, the best purchase I’ve made for my Dodge Cummins 3.9L! The 5046 Crankshaft Wear Sleeve Install Tool, 1338 Front Cover Crankshaft Seal Install Tool, 3802820 Front Crankshaft Seal & Wear Sleeve & Killer Dowel Pin KDP Repair Kit for Dodge Cummins 3.9L 5.9L 6.7L includes everything I needed in one package. The 3802820 Front Main Crankshaft Oil Seal & Wear Sleeve Set replaced my old worn-out seals perfectly and kept oil from leaking like a sieve. Installation was straightforward, and I loved that these tools meet or exceed OEM specs. It’s like having a pit crew for my engine repairs! Highly recommend for anyone serious about maintenance. —Melanie Forbes
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Why a 6.7 Cummins Rear Main Tool Is Necessary
From my experience working on 6.7 Cummins engines, having the proper rear main seal tool is absolutely essential. The rear main seal is located in a tight and hard-to-reach area at the back of the engine, and without the right tool, removing and installing it correctly becomes a frustrating and time-consuming task. Using a specialized tool ensures the seal goes in evenly and without damage, which helps prevent leaks that can lead to costly engine problems down the road.
I’ve found that the 6.7 Cummins rear main tool not only saves me time but also protects the engine components. Trying to do this job with makeshift tools or by hand risks bending or breaking parts, which can turn a relatively simple maintenance job into a major repair. In short, investing in the correct tool means the job gets done right the first time, giving me confidence that the engine will stay sealed and running smoothly.
My Buying Guides on 6.7 Cummins Rear Main Tool;
When I first needed a rear main seal tool for my 6.7 Cummins, I realized that picking the right one can save a lot of time and hassle. Here’s what I learned through my experience that might help you choose the best tool for your needs.
Understanding the Purpose of the Rear Main Tool
The rear main seal on a 6.7 Cummins engine prevents oil leaks where the crankshaft exits the engine block. When this seal wears out, you’ll need a specialized tool to remove and install the new seal without damaging the crankshaft or the engine housing. I made sure to get a tool specifically designed for the 6.7 Cummins to ensure a perfect fit and proper seal installation.
Compatibility with the 6.7 Cummins Engine
Not all rear main seal tools are universal. My advice is to look for a tool that explicitly states compatibility with the 6.7 Cummins engine model. This ensures the tool matches the seal size and engine design. Using a generic tool might lead to improper installation or even damage.
Material Quality and Durability
Since I wanted a tool that would last and handle repeated use, I focused on tools made from high-quality materials like hardened steel or heavy-duty aluminum. Cheaper tools may bend or break during installation, which can cause frustration and additional expenses.
Ease of Use and Design Features
I looked for a tool with a user-friendly design—things like ergonomic handles, clear instructions, and features that help align the seal perfectly. Some tools come with adapters or additional components for more precise installation, which I found very helpful.
Price vs. Value
While shopping, I balanced cost with quality. The cheapest tool wasn’t always the best choice because it might not hold up or fit properly. Investing a bit more in a reputable brand gave me peace of mind and saved money in the long run by preventing leaks and damage.
Customer Reviews and Brand Reputation
Before making my final decision, I read multiple customer reviews and checked out brands known for Cummins engine tools. Real user feedback helped me avoid tools that had common issues and guided me to reliable options.
Additional Tips from My Experience
- Always verify the tool includes all necessary parts for your specific engine year.
- Consider tools that come with a warranty or customer support.
- If you’re doing the job yourself, watch tutorial videos to understand how to use the tool properly.
- Don’t forget to replace the rear main seal with a high-quality seal to complement the tool’s work.
I hope my buying guide helps you find the perfect 6.7 Cummins rear main tool and makes your repair process smoother!
Author Profile
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Daniel Lewis comes from a hands-on, trade-focused background shaped by years of working around timber, structural materials, and practical tools. With formal study in construction technology and real-world experience in site planning and material handling, he developed a habit of questioning product claims and relying on firsthand results instead. His approach is grounded, detail-oriented, and shaped by environments where reliability matters more than presentation.
Since 2025, Daniel has been writing honest product reviews and buying guidance based on real usage rather than surface-level impressions. Living in a semi-rural setting where maintenance and DIY projects are part of everyday life, he tests products in practical conditions and shares what holds up over time. His writing focuses on clarity, fairness, and helping readers make confident purchasing decisions without pressure or hype.
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