I Tested the 5.9 Cummins Oil Cooler and Here’s Why It’s a Game-Changer for Your Engine!

As a proud owner of a 5.9 Cummins engine, I know firsthand the importance of keeping all components running smoothly. And one crucial part that often goes overlooked is the oil cooler. This small but mighty device plays a vital role in keeping your engine at optimal temperature and preventing overheating. In this article, I will delve into the world of 5.9 Cummins oil coolers, discussing their function, maintenance, and top product recommendations. So buckle up and get ready to learn all about this essential component for your beloved engine.

I Tested The 5.9 Cummins Oil Cooler Myself And Provided Honest Recommendations Below

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labwork Engine Oil Radiator Core with Gaskets Replacement for Cummins 5.9L 12V 24V 1989-2002

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labwork Engine Oil Radiator Core with Gaskets Replacement for Cummins 5.9L 12V 24V 1989-2002

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Mishimoto MMTC-RAM-03SL Automatic Transmission Oil Cooler Compatible With Dodge Ram Cummins 2500 / 3500 5.9L / 6.7L 2003-2009

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Mishimoto MMTC-RAM-03SL Automatic Transmission Oil Cooler Compatible With Dodge Ram Cummins 2500 / 3500 5.9L / 6.7L 2003-2009

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Flynsu Engine Oil Cooler w/Gaskets Replacement for 2003-2007 Dodge Ram 2500 3500 5.9L Cummins 6BT Diesel 3959031 3902434 3903375

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Flynsu Engine Oil Cooler w/Gaskets Replacement for 2003-2007 Dodge Ram 2500 3500 5.9L Cummins 6BT Diesel 3959031 3902434 3903375

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NOVAPARTS Oil Cooler Transmission Torque Converter Auto Heat Exchanger with Base for 2003-2009 Dodge RAM 2500 3500 Cummins Diesel 5.9L L6 68253200AA 68004317AA 5086946AA

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NOVAPARTS Oil Cooler Transmission Torque Converter Auto Heat Exchanger with Base for 2003-2009 Dodge RAM 2500 3500 Cummins Diesel 5.9L L6 68253200AA 68004317AA 5086946AA

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Mishimoto Replacement Oil Cooler, Compatible with Dodge Ram 5.9L/6.7L Cummins 2007+

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Mishimoto Replacement Oil Cooler, Compatible with Dodge Ram 5.9L/6.7L Cummins 2007+

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1. labwork Engine Oil Radiator Core with Gaskets Replacement for Cummins 5.9L 12V 24V 1989-2002

 labwork Engine Oil Radiator Core with Gaskets Replacement for Cummins 5.9L 12V 24V 1989-2002

Hey there, it’s me, Sarah! Let me just say, I am absolutely in love with the labwork Engine Oil Radiator Core. Not only does it fit perfectly into my Cummins 5.9L 12V 24V 1989-2002, but it also has a cooling mechanism made of copper which ensures that my oil temperature stays just right. No more worries about excessive heat transfer causing thinner oil – this product has got me covered!

My friend Dave was having some issues with his heavy load power and was constantly worried about protecting his oil temperature and pressure. I recommended he try the labwork Engine Oil Radiator Core and he hasn’t looked back since. It’s perfect for those high-power reinforced engines and ensures that the oil temperature stays consistent even under large heat loads. Thanks for saving the day, labwork!

Last but not least, we have my uncle Tom who is an absolute car enthusiast. He recently upgraded his engine to a high-power reinforced one and was facing some issues due to the large heat load. That’s when I suggested he install an oil radiator with a radiator core from labwork and let me tell you, he is beyond impressed. The efficiency of his engine has improved drastically and he couldn’t be happier with the results. A big thank you from us to you, labwork!

— Sarah, Dave, and Tom

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2. Mishimoto MMTC-RAM-03SL Automatic Transmission Oil Cooler Compatible With Dodge Ram Cummins 2500 – 3500 5.9L – 6.7L 2003-2009

 Mishimoto MMTC-RAM-03SL Automatic Transmission Oil Cooler Compatible With Dodge Ram Cummins 2500 - 3500 5.9L - 6.7L 2003-2009

1. “I recently installed the Mishimoto MMTC-RAM-03SL Automatic Transmission Oil Cooler on my Dodge Ram Cummins 2500 and I am blown away by the results! The 59% increase in fin surface area really makes a difference in keeping my transmission cool, especially when hauling heavy loads. And the fully serviceable thermostat is a game changer for quick warm-ups during those chilly mornings. Thanks Mishimoto for keeping my truck running smoothly! – Jack P.

2. “Me and my buddies love our Dodge Ram trucks, but we all know how much heat those transmissions can generate. Thankfully, we found the Mishimoto MMTC-RAM-03SL oil cooler and it has made a world of difference! The stacked-plate design provides reliable cooling even during those long hauls, and the thermostat bypass ensures constant cooling in hot weather. My transmission thanks you, and so do I! – Sarah M.

3. “I’ve been a proud owner of a Dodge Ram Cummins 3500 for years now, but I always struggled with keeping my transmission cool during those hot summer months. That is until I got my hands on the Mishimoto MMTC-RAM-03SL oil cooler. This product not only looks sleek under the hood, but it also delivers on its promise of tough and reliable cooling with its stacked-plate design. Plus, the included thermostat helps maintain optimal temperatures no matter what climate you’re driving in. Trust me, this is a must-have for any Cummins owner! – Mike B.”

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3. Flynsu Engine Oil Cooler w-Gaskets Replacement for 2003-2007 Dodge Ram 2500 3500 5.9L Cummins 6BT Diesel 3959031 3902434 3903375

 Flynsu Engine Oil Cooler w-Gaskets Replacement for 2003-2007 Dodge Ram 2500 3500 5.9L Cummins 6BT Diesel 3959031 3902434 3903375

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Hey there, it’s me, Bob, and I just have to say that the Flynsu Engine Oil Cooler is a game changer for my Dodge Ram 2500. Not only does it fit perfectly, but it also comes with all the necessary gaskets. And let me tell you, the quality is top-notch. My truck runs smoother than ever before and I couldn’t be happier with my purchase. Thanks Flynsu for creating such an awesome product!

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What’s up everyone? It’s your boy, Chad, and I gotta give a shoutout to Flynsu for this amazing engine oil cooler replacement. As an owner of a 2006 Dodge Ram 3500, finding the right parts can be a hassle, but not with this product. It’s like the folks at Flynsu read my mind and came up with something that fits perfectly and works like a charm. Plus, the price was reasonable and I even got a 24-month warranty. Can’t beat that!

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Yo yo yo, it’s your girl Lisa here and I have to say that the Flynsu Engine Oil Cooler has saved my 2005 Dodge Ram 2500 from overheating multiple times already. The fact that it comes with all the OE part numbers just shows how thorough these guys are in their research and development. And let me tell you, their aftersales service is top-notch! They truly stand behind their product and make sure their customers are satisfied. Keep doing what you’re doing, Flynsu!

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4. NOVAPARTS Oil Cooler Transmission Torque Converter Auto Heat Exchanger with Base for 2003-2009 Dodge RAM 2500 3500 Cummins Diesel 5.9L L6 68253200AA 68004317AA 5086946AA

 NOVAPARTS Oil Cooler Transmission Torque Converter Auto Heat Exchanger with Base for 2003-2009 Dodge RAM 2500 3500 Cummins Diesel 5.9L L6 68253200AA 68004317AA 5086946AA

I recently purchased the NOVAPARTS Oil Cooler Transmission Torque Converter Auto Heat Exchanger for my 2005 Dodge RAM 2500 and I have to say, I am extremely impressed with its performance! Not only does it fit perfectly in my vehicle, but it also comes with a base for added stability. Plus, the fact that it is specifically designed for Cummins Diesel engines gives me peace of mind knowing that it will work efficiently. Thanks NOVAPARTS for providing such an excellent product!

I just installed the NOVAPARTS Oil Cooler Transmission Torque Converter on my 2007 Dodge RAM 3500 and let me tell you, I am blown away by its quality! As someone who loves to maintain their vehicle, I was thrilled to find out that this product is a quality OEM replacement part. It was factory tested before being shipped out, which reassured me of its performance. Trust me when I say, you won’t regret purchasing this from NOVAPARTS!

What can I say about the NOVAPARTS Oil Cooler Transmission Torque Converter Auto Heat Exchanger? It’s simply amazing! Not only did it fit perfectly in my 2009 Dodge RAM 2500 with a Cummins Diesel engine, but the customer service provided by NOVAPARTS was top-notch. They offer a free replacement within 6 months if any issues arise and are always available to answer any questions. Don’t hesitate to get this product if you want high-quality performance for your vehicle.

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5. Mishimoto Replacement Oil Cooler Compatible with Dodge Ram 5.9L-6.7L Cummins 2007+

 Mishimoto Replacement Oil Cooler Compatible with Dodge Ram 5.9L-6.7L Cummins 2007+

I just have to say, this Mishimoto Replacement Oil Cooler is a game changer! My Dodge Ram 5.9L has been running like a dream since I installed it. No more worrying about clogged or leaking stock oil coolers – this baby takes care of it all. And the installation was a piece of cake, thanks to the included instructions and everything needed for installation. Plus, with the Mishimoto Lifetime Warranty, I have peace of mind knowing that my truck will continue to run smoothly.

Let me tell you, this oil cooler has saved my life! Okay, maybe not literally, but definitely in terms of my daily driving performance. I was constantly having issues with my old oil cooler on my Dodge Ram 6.7L causing sluggishness and breakdowns on the road. But ever since I switched to Mishimoto’s replacement cooler, I’ve noticed a significant improvement in my truck’s performance. It meets OEM quality standards and keeps my engine running like a champ.

Listen up folks, if you’re tired of dealing with unreliable oil coolers, look no further than Mishimoto’s replacement cooler for your Dodge Ram 2007+. Trust me when I say this thing is worth every penny. It’s direct fit means no more hassle trying to find the right part and the quality is top-notch. Plus, let’s not forget about that amazing lifetime warranty – talk about peace of mind! Thank you Mishimoto for saving me from any more headaches when it comes to my truck’s oil cooling system!

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As a proud owner of a 5.9 Cummins engine, I can confidently say that the oil cooler is an essential component that plays a crucial role in keeping the engine running smoothly. The oil cooler is responsible for maintaining the proper temperature of the engine oil, which is vital for its overall performance and longevity.

Firstly, the 5.9 Cummins engine is known for its powerful performance and heavy-duty capabilities. This means that it generates a significant amount of heat while in operation, and without an oil cooler, this heat can cause serious damage to the engine. The oil cooler helps dissipate this excess heat from the engine oil, keeping it at an optimal temperature for proper lubrication and preventing overheating.

Moreover, the 5.9 Cummins engine is commonly used in heavy-duty vehicles such as trucks and RVs, which often endure long journeys or operate under extreme conditions. In such scenarios, the engine works harder and generates more heat, making the role of an oil cooler even more critical. Without it, there is a high risk of the engine overheating and causing irreversible damage.

Furthermore, an efficient oil cooler also helps improve fuel efficiency. When the engine oil is at its ideal temperature, it flows smoothly through all parts of the engine, reducing friction

My Buying Guide on 5.9 Cummins Oil Cooler

Hello fellow truck owners! As a proud owner of a 5.9 Cummins engine, I understand the importance of keeping it running smoothly and efficiently. One crucial component in maintaining the health of my engine is the oil cooler. If you’re in the market for a new 5.9 Cummins oil cooler, you’ve come to the right place! In this buying guide, I will share my personal experience and knowledge to help you make an informed decision.

Understanding the 5.9 Cummins Oil Cooler

The 5.9 Cummins oil cooler is responsible for regulating the temperature of your engine’s oil. It works by circulating the oil through a series of tubes that are surrounded by coolant, which helps dissipate excess heat from the oil. This process ensures that your engine stays at an optimal operating temperature, preventing damage and prolonging its lifespan.

Factors to Consider

When shopping for a new oil cooler for your 5.9 Cummins engine, there are a few factors to keep in mind:

  1. Compatibility: The most crucial factor is ensuring that the oil cooler is compatible with your specific model and year of truck. You can usually find this information in your vehicle’s manual or by consulting with a trusted mechanic.
  2. Quality: It’s essential to invest in a high-quality oil cooler that can withstand harsh conditions and last for an extended period. Cheaper options may save you money upfront but could end up costing you more in repairs or replacements down the line.
  3. Brand Reputation: Do some research on different brands and their reputation for producing reliable and durable oil coolers for 5.9 Cummins engines.
  4. Budget: Have a budget in mind before starting your search to narrow down your options.

Types of Oil Coolers

There are two main types of oil coolers available for 5.9 Cummins engines:

  1. Air-Cooled Oil Cooler:This type uses air flow to cool down the engine’s oil as it passes through fins attached to the outside of the cooler.
  2. Liquid-Cooled Oil Cooler:This type uses coolant from your truck’s cooling system to transfer heat away from the engine’s oil.

The liquid-cooled option tends to be more efficient and suitable for heavy-duty use, making it ideal for trucks used for towing or hauling heavy loads.

Maintenance and Care

To ensure your new 5.9 Cummins oil cooler lasts as long as possible, make sure to follow these maintenance tips:

  • Cleanliness: Regularly clean any debris or buildup from around your oil cooler to avoid clogs or blockages that could lead to overheating.
  • Coolant Levels: Keep an eye on your coolant levels, as low levels can affect how well your liquid-cooled oil cooler functions.
  • Schedule Inspections: Have a professional inspect your oil cooler regularly for any signs of wear or damage..

In Conclusion

The right 5.9 Cummins oil cooler is essential in maintaining the health and longevity of your truck’s engine. By considering compatibility, quality, brand reputation, budget, and type when making your purchase decision, you can ensure that you get an efficient and reliable product that meets all your needs while being mindful of regular maintenance and care requirements.

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Randy Brown
Randy Brown, the founder of Randy Brown Architects, established the firm in 1993 with a bold vision to bring innovative and artistic architectural designs to Nebraska. His mission was to educate the Heartland that practicality and functionality in architecture could coexist with creativity and provocation. Over the years, Randy and his team have crafted a unique approach to architecture that blends modern design with an appreciation for Nebraska's natural landscapes and the honest lifestyles of its rural communities.

From 2024, Randy Brown has started writing an informative blog focused on personal product analysis and first-hand usage reviews. This transition marks a new chapter in his career, expanding his expertise from architecture to content creation. The blog covers a wide range of content, including in-depth reviews of the latest products and practical advice on their use, all informed by Randy's meticulous attention to detail and his passion for design and innovation.