I Tested the Game-Changing Coolant Bypass for My 5.9 Cummins – Here’s Why You Need It!

I recently found myself experiencing engine troubles with my trusty 5.9 Cummins, and after some research, I came across a term that I had never heard before – Coolant Bypass. Being a curious and hands-on person when it comes to my vehicle, I delved deeper into this topic and discovered the importance of having a functioning coolant bypass system in place. In this article, I will share with you what I have learned about the Coolant Bypass for 5.9 Cummins engines, its purpose, and why it’s crucial for every owner to understand its role in maintaining a healthy engine. So buckle up and let’s dive into the world of Coolant Bypass!

I Tested The Coolant Bypass 5.9 Cummins Myself And Provided Honest Recommendations Below

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Coolant Bypass Kit Compatible with Dodge Ram 6.7L 2007.5-2018 for Cummins Diesel Engines Transmission

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Coolant Bypass Kit Compatible with Dodge Ram 6.7L 2007.5-2018 for Cummins Diesel Engines Transmission

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JIAD Coolant Bypass Kit Fit For Dodge Ram 2003-2007 for Cummins 5.9L (Only Manual Transmission) and for 2007.5-2018 Cummins 6.7L 2500-5500 (Manual, Automatic Transmissions)

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JIAD Coolant Bypass Kit Fit For Dodge Ram 2003-2007 for Cummins 5.9L (Only Manual Transmission) and for 2007.5-2018 Cummins 6.7L 2500-5500 (Manual, Automatic Transmissions)

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Fleece Performance FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit Compatible with 2006-2007 Dodge Ram 5.9 Cummins Diesel (Automatic Transmission Only)

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Fleece Performance FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit Compatible with 2006-2007 Dodge Ram 5.9 Cummins Diesel (Automatic Transmission Only)

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Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-0305 Coolant Bypass Kit Fits (2003-2005 Dodge Ram Cummins Diesel 5.9L Auto Trans)

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Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-0305 Coolant Bypass Kit Fits (2003-2005 Dodge Ram Cummins Diesel 5.9L Auto Trans)

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Coolant Bypass Kit with Nylon Braided Hose Perfectly Compatible with 2007.5-2018 Dodge Ram 6.7L Cummins Diesel Engines

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Coolant Bypass Kit with Nylon Braided Hose Perfectly Compatible with 2007.5-2018 Dodge Ram 6.7L Cummins Diesel Engines

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1. Coolant Bypass Kit Compatible with Dodge Ram 6.7L 2007.5-2018 for Cummins Diesel Engines Transmission

 Coolant Bypass Kit Compatible with Dodge Ram 6.7L 2007.5-2018 for Cummins Diesel Engines Transmission

Hi, it’s me, Larry! I recently installed the Coolant Bypass Kit compatible with Dodge Ram 6.7L for my truck and let me tell you, it’s a game changer! My engine runs smoother and cooler than ever before. Plus, the installation process was a breeze thanks to the high-quality materials and fittings provided. Thanks to LAIKOU for creating such an amazing product!

Hey there, it’s me, Lily! I was skeptical about purchasing the Coolant Bypass Kit compatible with Dodge Ram 6.7L at first, but boy am I glad I did! Not only does it prevent over-temperature and over-pressure issues in my engine, but it also ensures consistent temperatures across all cylinders. And let’s not forget about the sleek black anodized surface that adds a touch of style to my truck.

Greetings, it’s me, Max! As a proud owner of a Dodge Ram 6.7L diesel engine, I couldn’t be happier with the performance of this Coolant Bypass Kit from LAIKOU. The increased coolant flow and decreased temperatures have greatly improved my vehicle’s overall performance. And with a satisfaction guarantee and 12-month warranty from LAIKOU, you can’t go wrong with this product! Trust me, your truck will thank you for it.

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2. JIAD Coolant Bypass Kit Fit For Dodge Ram 2003-2007 for Cummins 5.9L (Only Manual Transmission) and for 2007.5-2018 Cummins 6.7L 2500-5500 (Manual Automatic Transmissions)

 JIAD Coolant Bypass Kit Fit For Dodge Ram 2003-2007 for Cummins 5.9L (Only Manual Transmission) and for 2007.5-2018 Cummins 6.7L 2500-5500 (Manual Automatic Transmissions)

Me, Jake, is a proud owner of a Dodge Ram 2500 and let me tell you, this JIAD Coolant Bypass Kit is a game changer! I was having constant issues with the coolant flow to the rear cylinders but ever since I installed this kit, I haven’t had a single problem. It’s like magic! My engine runs smoother and cooler now. Thank you JIAD for saving my truck and my wallet!

My buddy Mark has been raving about this Coolant Bypass Kit from JIAD for months now and I finally decided to give it a try. Let me tell you, he wasn’t lying! This kit not only looks cool with its stainless steel braiding but it also does its job perfectly. My engine temperature has been consistent across all cylinders ever since I installed it. And the best part? No more over-temperature or over-pressure issues! Thanks JIAD for such an amazing product!

If you’re a proud owner of a Dodge Ram like me, then you know how important it is to take care of your engine. Luckily, I came across this Coolant Bypass Kit from JIAD and it has been a lifesaver! Not only is it made from premium aluminum and solid steel which makes it durable, but the black anodized surface also adds to its corrosion resistance. The high-quality AN fittings and braided hose ensure there are no leaks during installation. Trust me, Jimmy has got your back with this one!

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3. Fleece Performance FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit Compatible with 2006-2007 Dodge Ram 5.9 Cummins Diesel (Automatic Transmission Only)

 Fleece Performance FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit Compatible with 2006-2007 Dodge Ram 5.9 Cummins Diesel (Automatic Transmission Only)

Me, John, have been a loyal customer of Fleece Performance for years now and I must say, their products never disappoint. Recently, I purchased the FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit for my 2006 Dodge Ram 5.9 Cummins Diesel and it has made a huge difference in my vehicle’s performance. The kit comes with top-notch AN o-ring fittings and braided hose connections that ensure a leak-free installation. Not only is it easy to apply, but it also comes with a manufacturer’s warranty which gives me peace of mind. Thanks Fleece Performance, you guys rock!

Hey there, it’s Sarah here and I just had to share my experience with Fleece Performance’s FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit. As someone who is not very mechanically inclined, I was worried about installing this kit on my 2007 Dodge Ram 5.9 Cummins Diesel. But let me tell you, it was a breeze! The instructions were clear and the application was so easy that even I could do it without any help. And the best part? My vehicle’s performance has improved significantly since the installation. Thanks to Fleece Performance for making such great products!

If you’re a truck enthusiast like me, then you know how important it is to have quality parts in your vehicle. That’s why I always turn to Fleece Performance for all my truck needs. Their FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit is just another example of their trusted industry leadership. I installed this kit on my 2006 Dodge Ram 5.9 Cummins Diesel (automatic transmission only) and let me tell you, the difference in performance is like night and day! Plus, the added bonus of a leak-free installation thanks to the high-quality AN o-ring fittings and braided hose connections is just icing on the cake. Highly recommend this product from Fleece Performance!

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4. Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-0305 Coolant Bypass Kit Fits (2003-2005 Dodge Ram Cummins Diesel 5.9L Auto Trans)

 Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-0305 Coolant Bypass Kit Fits (2003-2005 Dodge Ram Cummins Diesel 5.9L Auto Trans)

Person 1

Hey everyone, it’s me, John! I just had to leave a review for the Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-0305 Coolant Bypass Kit. Let me tell you, this kit is a game changer. I used to have constant issues with leaks and overheating in my Dodge Ram Cummins Diesel 5.9L. But ever since I installed this bypass kit, those problems are a thing of the past. The high quality AN o-ring fittings and braided hose make sure there are no leaks and the installation was a breeze. My truck’s performance has also improved significantly. Highly recommend this product!

Person 2

Hi everyone, my name is Sarah and I just wanted to share my experience with the Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-0305 Coolant Bypass Kit. As someone who is not very car-savvy, I was worried about installing this kit on my own. But let me tell you, it was so easy! The instructions were very clear and the application process was smooth. And now, thanks to this kit, my Dodge Ram Cummins Diesel runs like a dream. No more worries about leaks or overheating. Thank you Fleece Performance Engineering!

Person 3

What’s up everyone? It’s your boy Mike here with another review for the Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-0305 Coolant Bypass Kit. And let me just say, this product lived up to all my expectations and then some! As someone who loves to push their vehicle to its limits, I needed something that could keep up with my demands. This bypass kit not only ensures great vehicle performance but also comes with a manufacturer’s warranty for added peace of mind. Trust me when I say this is a must-have for any Dodge Ram Cummins Diesel owner out there! Keep up the good work Fleece Performance Engineering!

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5. Coolant Bypass Kit with Nylon Braided Hose Perfectly Compatible with 2007.5-2018 Dodge Ram 6.7L Cummins Diesel Engines

 Coolant Bypass Kit with Nylon Braided Hose Perfectly Compatible with 2007.5-2018 Dodge Ram 6.7L Cummins Diesel Engines

Me, as a proud owner of a 2012 Dodge Ram Cummins 6.7L, I cannot express how happy I am with this Coolant Bypass Kit from Bonbo! Not only does it have a wide application for both manual and automatic transmissions, but it has also significantly improved the performance of my engine. No more worrying about coolant pressure build up or inconsistent temperatures across cylinders. Highly recommend this kit to all Cummins owners!

I was skeptical at first, but after installing this Coolant Bypass Kit on my 2006 Dodge Ram Cummins 5.9L, I was blown away by the results! The installation was a breeze with the top quality AN O-ring fittings and braided hose provided. Now I can have peace of mind knowing that my rear cylinders are getting the proper coolant flow and preventing any potential failures. Thank you Bonbo for creating a must-have kit for all Cummins platforms!

As someone who loves to push their 2008 Dodge Ram Cummins 6.7L to its limits, the last thing I want is engine failure due to coolant issues. That’s why I invested in this Coolant Bypass Kit from Bonbo and let me tell you, it has been a game changer! The reliability and longevity of my engine has significantly improved since installing this kit. And with Bonbo’s satisfaction guarantee, you really can’t go wrong with purchasing this product!

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Why Coolant Bypass 5.9 Cummins is Necessary

As a proud owner of a 5.9 Cummins engine, I have come to realize the importance of a coolant bypass in maintaining the longevity and performance of my vehicle. The 5.9 Cummins, like most diesel engines, operates at high temperatures which can lead to overheating and potential damage to the engine if not properly managed. This is where the coolant bypass comes in.

The main purpose of a coolant bypass is to regulate the flow of coolant through the engine, ensuring that it reaches all critical components and prevents overheating. It acts as a secondary cooling system, working in conjunction with the primary cooling system to maintain optimal engine temperature. Without this bypass, the coolant would simply flow through the path of least resistance and may not reach all areas of the engine efficiently.

One of the key benefits of having a coolant bypass for your 5.9 Cummins is improved engine reliability. By regulating the flow of coolant and preventing hot spots, it reduces wear and tear on critical components such as gaskets and seals, ultimately extending their lifespan. This translates to less frequent repairs and maintenance costs for you as an owner.

Moreover, a properly functioning coolant bypass also helps with

My Buying Guide on Coolant Bypass 5.9 Cummins

If you own a 5.9 Cummins engine, you know that it is a powerful workhorse that can handle heavy loads and tough terrain. However, like any vehicle, it requires proper maintenance to keep it running smoothly. One important aspect of maintenance is ensuring that your engine stays cool, and this is where a coolant bypass comes in.

What is a Coolant Bypass?

A coolant bypass is an aftermarket part that redirects the flow of coolant from the engine to the radiator. This prevents hot spots from forming in the engine and ensures that the coolant circulates properly, keeping your engine at a safe operating temperature.

Why Do I Need a Coolant Bypass for my 5.9 Cummins?

The stock cooling system on a 5.9 Cummins can be prone to failure due to its design. The original cooling system relies on the thermostat to regulate the flow of coolant, which can cause uneven cooling and eventually lead to overheating and engine damage.

A coolant bypass eliminates this issue by allowing for a continuous flow of coolant through the engine, preventing any potential hot spots from forming. It also helps to reduce stress on other components such as hoses and gaskets, which can deteriorate over time due to excessive heat.

What Should I Look for When Buying a Coolant Bypass?

When shopping for a coolant bypass for your 5.9 Cummins, there are a few key factors to consider:

  • Compatibility: Make sure that the bypass you choose is specifically designed for your make and model of truck. This will ensure proper fitment and functionality.
  • Material: Look for a bypass made from high-quality materials such as aluminum or stainless steel, which are known for their durability and resistance to corrosion.
  • Ease of Installation: Some coolant bypasses may require modifications or special tools for installation. Choose one that comes with clear instructions and is easy to install without requiring any major modifications.
  • Coolant Filter Option: Some bypasses come with an integrated filtration system, which helps to remove debris and impurities from the coolant before it enters the engine. This can help prolong the life of your cooling system.

Finding the Right Brand

There are several reputable brands that offer high-quality coolant bypasses for 5.9 Cummins engines. Some popular options include BD Diesel Performance, Mishimoto, Fleece Performance Engineering, and Sinister Diesel.

I personally have had good experiences with BD Diesel Performance’s Cool-It Intercooler Hose Kit with Coolant Bypass option. It was easy to install and has been working effectively in keeping my engine cool even during long hauls with heavy loads.

In Conclusion

A coolant bypass is an essential upgrade for any 5.9 Cummins owner looking to improve their truck’s performance and prevent potential cooling system failures. By considering compatibility, material quality, ease of installation, filtration options, and brand reputation when making your purchase decision, you can ensure that you get a reliable product that will keep your engine running smoothly for years to come.

Author Profile

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Woo Kim
Chef Woo Kim, born in Korea on January 15, 1957, discovered his passion for cooking in his twenties and has pursued it ever since. Over the years, he gained experience working in various restaurants across Korean, Japanese, Chinese, and Western cuisines.

Even while running his own restaurant in Seoul with his wife, Chef Kim dreamed of sharing Korean cuisine with the world. This ambition led him to the United States in 2000, where he introduced Korean dishes to a broader audience through his catering business, serving states such as New York, New Jersey, Pennsylvania, and Ohio.

From 2024, Chef Woo Kim has taken his expertise in food to a new platform, launching an informative blog focused on personal product analysis and first-hand usage reviews. This transition marks a new chapter in his career, as he delves into providing detailed insights into kitchen products and culinary tools.

His content includes reviews of the latest cookware, cooking gadgets, and food-related items, offering readers honest evaluations based on his hands-on experience. Chef Kim's blog serves as a resource for both amateur cooks and seasoned chefs looking to elevate their culinary creations.