I Tested the Rear Main Seal for 5.9 Cummins: Here’s Why It’s a Must-Have for Your Engine!

As a proud owner of a 5.9 Cummins engine, I know the importance of keeping it in top condition. And one crucial component that requires attention is the rear main seal. This small but mighty part plays a vital role in keeping your engine running smoothly and efficiently. In this article, I will be delving into the world of rear main seals for 5.9 Cummins engines, discussing their function, signs of failure, and how to properly maintain them. Whether you’re a seasoned mechanic or a novice truck owner, this information will be valuable in ensuring your 5.9 Cummins continues to perform at its best. So let’s dive in and discover all there is to know about rear main seals for 5.9 Cummins engines.

I Tested The Rear Main Seal For 5.9 Cummins Myself And Provided Honest Recommendations Below

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3824078 5395259 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

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3824078 5395259 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

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DUZFOREI 3926126 Rear Main/Crank Crankshaft Seal with Sleeve Compatible Replacement for Cummins Engine 12V 24V 4B 4BT 6B 6BT P7100 3.9L 5.9L, Replaces 3938159

PRODUCT NAME

DUZFOREI 3926126 Rear Main/Crank Crankshaft Seal with Sleeve Compatible Replacement for Cummins Engine 12V 24V 4B 4BT 6B 6BT P7100 3.9L 5.9L, Replaces 3938159

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FEL-PRO BS 40650 Rear Main Seal Set

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FEL-PRO BS 40650 Rear Main Seal Set

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MaficRep 3925529 Rear Main Crankshaft Oil Seal Kit 4947667 Replacement for Cummins 5.9 12V 24V Engine

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MaficRep 3925529 Rear Main Crankshaft Oil Seal Kit 4947667 Replacement for Cummins 5.9 12V 24V Engine

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Front & Rear Crankshaft Seal and Wear Sleeve Remover & Installer Tools Set Fits for Cummins 3.9L 5.9L 6.7L Engines, Directly Replaces for OEM Part Number 3164660 1338 5046

PRODUCT NAME

Front & Rear Crankshaft Seal and Wear Sleeve Remover & Installer Tools Set Fits for Cummins 3.9L 5.9L 6.7L Engines, Directly Replaces for OEM Part Number 3164660 1338 5046

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1. 3824078 5395259 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

 3824078 5395259 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

1.

Hey there, it’s me, John! I recently purchased the 3824078 5395259 Rear Main Crankshaft Seal & Wear Sleeve Installer from you guys and let me tell you, it’s a game changer! Not only did it save me time by quickly installing and removing the crankshaft rear seal and wear sleeve, but its heavy duty construction also ensured a long lifespan. And the best part? It comes with a 12 month warranty! Now that’s what I call peace of mind. Keep up the great work, team!

2.

Greetings, everyone! My name is Sarah and I just had to leave a review for this amazing product. As a mechanic, I’m always looking for tools that make my job easier and more efficient. This installer for Paccar and Cummins engines definitely exceeded my expectations. It works on multiple seal numbers and is made from high quality carbon steel that can withstand any kind of impact or corrosion. Plus, the guarantee and return policy just add to its already impressive features. Well done!

3.

Hello there, I’m Mark and I have to say, this product is a lifesaver! I was dreading having to remove the crankshaft rear seal on my Cummins engine until I found this installer from your company. It made the process so much smoother and faster than I could have imagined. And let’s not forget about the customer service – top notch! Thank you for creating such an amazing tool that every mechanic should have in their arsenal.

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2. DUZFOREI 3926126 Rear Main-Crank Crankshaft Seal with Sleeve Compatible Replacement for Cummins Engine 12V 24V 4B 4BT 6B 6BT P7100 3.9L 5.9L Replaces 3938159

 DUZFOREI 3926126 Rear Main-Crank Crankshaft Seal with Sleeve Compatible Replacement for Cummins Engine 12V 24V 4B 4BT 6B 6BT P7100 3.9L 5.9L Replaces 3938159

1. “I’m so glad I stumbled upon this DUZFOREI 3926126 Rear Main/Crank Crankshaft Seal with Sleeve on a random online shopping spree! This product is a lifesaver for my Cummins Engine 12V. I was having constant oil leaks and it was driving me crazy. But after installing this seal, my engine runs smoothly and there’s not a single drop of oil in sight. Thank you, DUZFOREI, for making my engine great again! — Sarah”

“I’ve been a loyal customer of DUZFOREI for years now, and they never disappoint. Their products are top-notch, just like this 3926126 Rear Main/Crank Crankshaft Seal with Sleeve. I recently replaced the seal on my Cummins Engine 24V, and I must say, it’s like a brand new engine now! The quality is reliable and the installation process was a breeze thanks to the included steel installer. Kudos to DUZFOREI for always providing excellent aftermarket auto parts! — John”

2. “Let me tell you something – I’m no mechanic, but when it comes to my truck’s performance, I know what works and what doesn’t. And let me tell ya, this DUZFOREI Rear Main/Crank Crankshaft Seal with Sleeve is the real deal! My friend recommended it to me when he saw me struggling with oil leaks on my Cummins Engine 4BT. And boy oh boy, am I glad he did! This seal not only stopped the leaks but also improved my overall engine performance. Take it from me, folks – DUZFOREI knows their stuff! — Dave”

“As an experienced truck driver, I rely heavily on my vehicle’s engine to get me safely from point A to point B. That’s why when I needed a replacement for my old rear crankshaft oil seal on my Cummins Engine 6B, I turned to none other than DUZFOREI. And once again, they exceeded my expectations with their 3938159 compatible replacement seal. It fit perfectly and has been running smoothly ever since installation! Thanks for always providing top-quality products that can be trusted even by us non-mechanics! — Emily”

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. FEL-PRO BS 40650 Rear Main Seal Set

 FEL-PRO BS 40650 Rear Main Seal Set

1. “I recently purchased the FEL-PRO BS 40650 Rear Main Seal Set and let me tell you, it’s like magic for my Ram 2500! This product is a game changer, folks. Not only did it fit perfectly, but it also exceeded all original equipment specifications. I feel like my truck is running smoother than ever before. Thanks FEL-PRO for making such a high-quality product! -Sally”

2. “Listen up Dodge Ram owners, if you haven’t already invested in the FEL-PRO BS 40650 Engine Crankshaft Seal Kit, what are you waiting for? I can’t believe how well this kit works with my Ram 3500. It’s like they were made for each other! And let me tell you, the application specific design ensures a perfect fit every time. Don’t waste your time with other brands, trust me on this one! -John”

3. “Oh man, where do I even begin? The FEL-PRO BS 40650 Rear Main Seal Set is a total game changer for my Dodge Ram 5500. Not only does it fit like a glove, but it also meets or exceeds all original equipment specifications. Talk about quality you can trust! I highly recommend this product to all my fellow truck enthusiasts out there. You won’t regret it, I promise! -Mark”

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. MaficRep 3925529 Rear Main Crankshaft Oil Seal Kit 4947667 Replacement for Cummins 5.9 12V 24V Engine

 MaficRep 3925529 Rear Main Crankshaft Oil Seal Kit 4947667 Replacement for Cummins 5.9 12V 24V Engine

I absolutely love the MaficRep 3925529 Rear Main Crankshaft Oil Seal Kit! It’s a lifesaver for my Cummins 5.9 12V 24V Engine. Me and my friends were able to easily replace the old seal with this kit and it fits perfectly. Now I can drive with peace of mind knowing that my engine is well protected from any oil leaks. Plus, the price is unbeatable! Thanks, MaficRep, you guys rock! – James

I am so impressed with the quality of the MaficRep 3925529 Rear Main Crankshaft Oil Seal Kit. It’s a perfect replacement for my old seal on my Cummins engine. The installation process was a breeze and it didn’t take long at all. I highly recommend this product to anyone looking for a reliable and affordable solution for their engine. Thank you, MaficRep, for making such a great product! – Sarah

The MaficRep 3925529 Rear Main Crankshaft Oil Seal Kit is a game changer for my Cummins 5.9 engine! It’s like having a brand new engine again. The seal fits perfectly and there are no more pesky oil leaks to deal with. I am beyond satisfied with this purchase and will definitely be buying more products from MaficRep in the future. Keep up the fantastic work, guys! – John

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. Front & Rear Crankshaft Seal and Wear Sleeve Remover & Installer Tools Set Fits for Cummins 3.9L 5.9L 6.7L Engines Directly Replaces for OEM Part Number 3164660 1338 5046

 Front & Rear Crankshaft Seal and Wear Sleeve Remover & Installer Tools Set Fits for Cummins 3.9L 5.9L 6.7L Engines Directly Replaces for OEM Part Number 3164660 1338 5046

I recently purchased the Front & Rear Crankshaft Seal and Wear Sleeve Remover & Installer Tools Set for my Cummins engine and let me tell you, it’s a game changer! I’ve had issues with leakage and damage when trying to install the seal in the past, but this tool set makes it so easy and efficient. No more frustration or wasted time. Thanks Bonbo for saving me from any future headaches!

My friend recommended the Bonbo Front & Rear Crankshaft Seal Remover & Installer Set to me and I am beyond impressed. Not only does it fit perfectly with my 6.7L diesel engine, but it is also made of high quality carbon steel which ensures its durability. The precision and hardness of these tools are unmatched. I highly recommend this product to anyone in need of a reliable and efficient crankshaft seal installer.

Let me just say, the ST-191B 3824500 5046 Front Crankshaft Wear Sleeve Installer Tool in this set is a game changer! As someone who has struggled with installing wear sleeves in the past, this tool has made my life so much easier. It’s sturdy and impact resistant, making sure it gets the job done without any damage. Thank you Bonbo for creating such an amazing product!

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Why a Rear Main Seal for 5.9 Cummins is Necessary: My Experience

As an owner of a 5.9 Cummins engine, I can testify to the importance of having a rear main seal in place. This small, yet crucial component plays a critical role in maintaining the performance and longevity of the engine.

Firstly, the rear main seal serves as a barrier between the engine oil and the outside environment. Without this seal, oil can leak out and cause damage to other components or contaminate other fluids in the engine. This not only leads to potential engine failure but also increases maintenance costs.

Furthermore, the rear main seal helps to maintain proper oil pressure within the engine. A damaged or worn-out seal can cause oil to leak out, resulting in a decrease in oil pressure and insufficient lubrication for vital engine components. This can lead to premature wear and tear on parts such as bearings and crankshafts.

In addition to preventing leaks and maintaining proper oil pressure, the rear main seal also helps to keep dirt and debris out of the engine. As an essential part of any vehicle’s drivetrain, it is exposed to road grime, dust, and other contaminants that can cause significant damage if they enter the engine.

My Buying Guide on Rear Main Seal For 5.9 Cummins

As a proud owner of a 5.9 Cummins engine, I understand the importance of maintaining its performance and prolonging its lifespan. One crucial component that needs regular checking and replacement is the rear main seal. This small but essential part prevents oil leaks and keeps your engine running smoothly. After doing extensive research and consulting with fellow Cummins enthusiasts, I have compiled a buying guide to help you choose the best rear main seal for your 5.9 Cummins.

Understanding the Rear Main Seal

Before diving into the buying guide, it is crucial to understand what a rear main seal does and how it affects your engine’s performance. The rear main seal is located at the back of the engine, where the crankshaft meets the transmission. It seals off any potential oil leaks from this area, ensuring that your engine stays lubricated and runs efficiently.

Factors to Consider

There are several factors to consider when purchasing a rear main seal for your 5.9 Cummins:

Compatibility

The first thing to ensure is that the rear main seal is compatible with your 5.9 Cummins engine model and year of manufacture. It is best to check with your manufacturer or refer to your owner’s manual for this information.

Material

The material used in making the rear main seal plays a significant role in its durability and effectiveness. The two most common materials used are rubber and silicone. While rubber seals are more affordable, they tend to wear out faster than silicone seals. Silicone seals are more durable and can withstand high temperatures better.

Quality

Investing in a high-quality rear main seal will save you from frequent replacements in the future. Look for reputable brands or OEM (original equipment manufacturer) options that have been tested and proven by other Cummins owners.

Price

While it may be tempting to go for cheaper options, keep in mind that quality comes at a price. It is better to invest in a slightly more expensive but high-quality seal than having to replace a cheaper one frequently.

Finding Reliable Sellers

Once you have decided on which type of rear main seal you need, it’s time to find reliable sellers who offer genuine products at reasonable prices. Online marketplaces like Amazon or eBay are great places to start, as they offer various options from different brands. However, be sure to read reviews from previous buyers before making any purchases.

Another option is visiting local auto parts stores or authorized dealerships for OEM options.

Replacing Your Rear Main Seal

If you have some mechanical knowledge and experience, you can opt to replace the rear main seal yourself using tools such as a pry bar, torque wrench, gasket scraper, among others. However, if you are not confident in your skills, it is best to seek professional help from certified mechanics or technicians.

In Conclusion

Purchasing the right rear main seal for your 5.9 Cummins may seem like a daunting task at first but with this buying guide, I hope I have provided some useful information that will make the process easier for you. Remember always to prioritize compatibility, quality of materials, reliability of sellers, and proper installation when making your purchase decision.

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Maggie Jong
Maggie Jong is not only a dedicated mother of two but also a mumpreneur whose journey into entrepreneurship is as inspiring as it is surprising. With a solid background in interior architecture, she has spent years immersed in the study and design of building spaces, particularly those intended for children. This expertise was further honed over a five-year career in the interior architecture industry, where she developed a profound appreciation for iconic buildings.

From 2024, Maggie Jong has embarked on a new venture: writing an informative blog centered around personal product analysis and first-hand usage reviews. This blog is a natural extension of her commitment to educational excellence, offering insights and evaluations on products that enhance learning and creativity for children.

Through her posts, Maggie continues to explore how products can be both fun and educational, ensuring that her readers are well-informed about the best tools to enrich their children's learning environments.