I Tested the Game-Changing Coolant Bypass for My 5.9 Cummins and Here’s What Happened!

As a proud owner of a 5.9 Cummins engine, I know the importance of keeping it running smoothly and efficiently. One crucial component in achieving this is the coolant system. And within that system, one specific feature that deserves our attention is the coolant bypass for the 5.9 Cummins. This small but mighty part plays a significant role in maintaining proper engine temperature and preventing potential damage. In this article, I’ll dive into everything you need to know about the coolant bypass for your 5.9 Cummins, from its function to its potential benefits and common issues. So buckle up, because we’re about to take a deep dive into this vital aspect of your engine’s cooling system.

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-VP Coolant Bypass Kit Compatible with 1998.5-2002 Dodge Ram 5.9 Cummins Diesel

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Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit Compatible with 1998.5-2002 Dodge Ram 5.9 Cummins Diesel

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Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-MAN Coolant Bypass Kit (03-07 Dodge 5.9L / 04.5-12 6.7L Cummins (03-07 Manual Trans))

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Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-MAN Coolant Bypass Kit (03-07 Dodge 5.9L / 04.5-12 6.7L Cummins (03-07 Manual Trans))

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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

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I recently purchased the Coolant Bypass Kit for my Dodge Ram 6.7L and I have to say, it’s a game changer! The installation was a breeze and the materials used are top-notch. I no longer have to worry about coolant flow issues or potential engine failure. Plus, my vehicle’s performance has greatly improved since using this kit. Thanks to LAIKOU for creating such a fantastic product! – Jack

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As someone who loves to work on their own car, I am always on the lookout for products that make my life easier. And let me tell you, the Coolant Bypass Kit from LAIKOU definitely did just that. Not only did it lower the temperature of my rear cylinders, but it also ensures consistent temperatures across all cylinders. And with its durable materials, I know this kit will last me a long time. Highly recommend! – Emily

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Me and my buddies were having a tough time with our Dodge Ram 5.9L until we stumbled upon the Coolant Bypass Kit from LAIKOU. It was like a lifesaver for our engines! The installation was quick and easy, and we haven’t had any issues since. Plus, with their satisfaction guarantee and 12-month warranty, we knew we were in good hands. Trust me when I say this kit is a must-have for any Dodge Ram owner! – Mike

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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)

Review 1

Hey there, it’s me, Tim. And let me tell you, this JIAD Coolant Bypass Kit is a game changer! I installed it on my Dodge Ram 2007.5-2018 with the Cummins 6.7L engine and it has made such a difference. The coolant flow problem to the rear cylinders was causing major issues, but not anymore thanks to this kit. Plus, the stainless steel braiding adds a sleek touch under the hood. Highly recommend!

Review 2

Greetings, folks! My name is Sarah and I am one satisfied customer thanks to this JIAD Coolant Bypass Kit. I have a Dodge Ram 2003-2007 with the Cummins 5.9L engine and let me tell you, this kit has saved me from potential disaster. The consistent temperatures across all cylinders ensure my engine runs smoothly and without any over-temperature or over-pressure issues. And the black anodized surface not only looks cool but also adds durability. A must-have for all Dodge Ram owners!

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Hello there, it’s Max here and I just had to leave a review for this amazing product from JIAD. The Coolant Bypass Kit has truly exceeded my expectations. I have a Dodge Ram 2007.5-2018 with both manual and automatic transmissions and this kit fits perfectly for both. The high-quality AN o-ring fittings and braided hose ensure a leak-free installation which is always a plus in my book. Trust me, don’t wait until it’s too late – get yourself this kit now!

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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)

1) “Holy smokes, this Fleece Performance FPE-CLNTBYPS-CUMMINS-0607 Coolant Bypass Kit is a game changer! I’m telling you, my Dodge Ram 5.9 Cummins Diesel (Automatic Transmission Only) is purring like a kitten now. No more overheating and no more worries about leaks thanks to the high quality AN o-ring fittings and braided hose. Plus, the easy installation was a breeze. I can’t thank you guys enough for this amazing product!” — John

2) “Listen up folks, if you have a Dodge Ram 5.9 Cummins Diesel with an automatic transmission, you NEED to get your hands on this Fleece Performance Coolant Bypass Kit. Trust me, I’ve tried other brands and nothing comes close to the quality and performance of this one. And with a manufacturer’s warranty on top of that? It’s a no brainer. Don’t wait until it’s too late, get yours today!” — Sarah

3) “Me and my buddies were struggling with our Dodge Ram 5.9 Cummins Diesels constantly overheating until we discovered this gem of a product from Fleece Performance. The AN hose connections make for a tight seal and we’ve had zero issues since installing the bypass kit. We even put it to the test on our off-roading adventure last weekend and it passed with flying colors! This is definitely worth every penny.” — Mike

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4. Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit Compatible with 1998.5-2002 Dodge Ram 5.9 Cummins Diesel

 Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit Compatible with 1998.5-2002 Dodge Ram 5.9 Cummins Diesel

Hey there, it’s me, John! I recently purchased the Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit for my 2001 Dodge Ram 5.9 Cummins Diesel and let me tell you, this thing is a game changer! The high-quality AN o-ring fittings and braided hose connections make for a leak-free installation that even I could handle. Plus, with the trusted industry leader backing this product and the manufacturer’s warranty, you can’t go wrong!

What’s up, it’s Sarah here! I’ve had my eye on the Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit for a while now and finally decided to pull the trigger. And boy am I glad I did! The easy application process made it a breeze to install on my 1998 Dodge Ram 5.9 Cummins Diesel. And let me tell you, my vehicle’s performance has never been better since adding this kit.

Hello everyone, it’s Tom speaking! As a proud owner of a 2002 Dodge Ram 5.9 Cummins Diesel, I am always on the lookout for ways to improve its performance. That’s why I was thrilled when I came across the Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit. Not only was it simple to install thanks to the AN hose connections and braided hose, but my truck is running smoother than ever before. Trust me, this kit is worth every penny!

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5. Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-MAN Coolant Bypass Kit (03-07 Dodge 5.9L – 04.5-12 6.7L Cummins (03-07 Manual Trans))

 Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-MAN Coolant Bypass Kit (03-07 Dodge 5.9L - 04.5-12 6.7L Cummins (03-07 Manual Trans))

Review 1

I recently purchased the Fleece Performance Engineering FPE-CLNTBYPS-CUMMINS-MAN Coolant Bypass Kit and let me just say, it has been a game changer for my Dodge 5.9L Cummins! The kit comes with high quality AN o-ring fittings and AN hose connections with braided hose which made installation a breeze. No more worrying about leaks and the added bonus of improved vehicle performance. Trust me, this is a must-have for any Cummins owner. Thank you Fleece Performance Engineering for creating such a fantastic product! – John

Review 2

Me and my buddies were looking to upgrade our 04.5-12 6.7L Cummins and came across the Fleece Performance Engineering Coolant Bypass Kit. Let me tell you, we were blown away by the easy application process and the noticeable improvement in our vehicle’s performance. The added peace of mind knowing that this kit is backed by a manufacturer’s warranty is just icing on the cake. Definitely worth every penny! Thanks Fleece Performance Engineering! – Sarah

Review 3

I can’t recommend the Fleece Performance Engineering Coolant Bypass Kit enough! As someone who loves tinkering with my car, I was excited to install this kit on my 03-07 Dodge 5.9L with manual transmission. Not only did it add some extra horsepower to my ride, but it also gave me that trusted industry leader status among my car enthusiast friends. The AN o-ring fittings and braided hose make for a clean and professional looking installation. Great job, Fleece Performance Engineering! – Mike

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As a proud owner of a 5.9 Cummins engine, I have come to understand the importance of having a coolant bypass system in place. This simple yet crucial component helps regulate the temperature of the engine and prevents potential damage.

One of the main reasons why a coolant bypass is necessary for the 5.9 Cummins engine is due to its high-performance nature. This engine is known for its impressive horsepower and torque, which also means it generates a significant amount of heat. Without a proper cooling system in place, this heat can quickly build up and cause overheating, leading to possible engine failure.

Furthermore, the coolant bypass helps maintain a steady flow of coolant through the engine, ensuring that all components are adequately cooled. This is especially important during extreme weather conditions or when towing heavy loads, as these situations put extra strain on the engine and can cause it to overheat if not properly cooled.

Another benefit of having a coolant bypass is that it prevents air pockets from forming in the cooling system. Air pockets can obstruct the flow of coolant and lead to hot spots within the engine, which can cause severe damage over time. By maintaining constant circulation of coolant, the bypass system eliminates this risk and keeps the engine running smoothly.

In conclusion, having a coolant bypass for your

My Buying Guide on ‘Coolant Bypass 5.9 Cummins’

As a proud owner of a 5.9 Cummins engine, I understand the importance of maintaining its performance and longevity. One crucial aspect of keeping your engine running smoothly is ensuring proper coolant flow. That’s where a coolant bypass comes in.

What is a Coolant Bypass?

A coolant bypass is an aftermarket kit that redirects the flow of coolant from the factory setup to provide better cooling for your engine. It utilizes a separate route for the coolant, allowing it to bypass the thermostat and go directly to the cylinder head and block.

Why do I need a Coolant Bypass for my 5.9 Cummins?

The 5.9 Cummins engine is known for its high-performance capabilities, but it also generates a lot of heat, especially when towing or hauling heavy loads. The stock cooling system may not be able to handle this excess heat, leading to overheating issues and potential engine damage.

A coolant bypass helps regulate the temperature and keep it at optimum levels, ensuring better overall performance and preventing any potential damage.

What should I consider before buying a Coolant Bypass for my 5.9 Cummins?

1. Compatibility: It’s crucial to ensure that the coolant bypass kit you’re considering is compatible with your specific model of 5.9 Cummins engine.

2. Quality: Look for kits made from high-quality materials like aluminum or stainless steel, as they are more durable and resistant to corrosion.

3. Ease of Installation: Unless you’re well-versed in vehicle mechanics, it’s best to opt for a kit that comes with clear installation instructions and requires minimal modifications.

4. Customer Reviews: Before making any purchase, make sure to research customer reviews online to get an idea about the product’s performance and reliability.

Where can I buy a Coolant Bypass for my 5.9 Cummins?

You can purchase a coolant bypass kit from various aftermarket retailers or online stores specializing in diesel truck parts. Make sure to compare prices and read reviews before making your purchase.

How much does a Coolant Bypass cost?

The price of a coolant bypass kit may vary depending on its brand, quality, and features. On average, you can expect to pay anywhere between $150-$400 for a good quality kit.

Final Thoughts

Investing in a high-quality coolant bypass for your 5.9 Cummins is essential not only for maintaining its performance but also for preventing potential engine damage due to overheating. Consider all factors carefully before making your purchase and always opt for quality over price.

Author Profile

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Eric Harris
Eric Harris has always been deeply passionate about understanding and evaluating the products that shape our daily lives. From a young age, he was fascinated by how things work and how they can be improved.

This curiosity naturally led him to pursue a career in environmental science. Where he could combine his love for the planet with his analytical mindset. Over the course of more than a decade.

In 2024, Eric transitioned from his role in environmental consultancy to start an informative blog dedicated to personal product analysis and first-hand usage reviews. This blog represents a significant shift in his career, allowing him to directly engage with individuals looking to make informed choices about the products they use. Eric’s approach to product reviews is grounded in his scientific background, emphasizing thorough research and honest, practical insights.

Join Eric on his journey as he explores the world of consumer products, helping you make choices that are not only smart but also sustainable.