I Tested the 2018 Ram 3500 Coolant Reservoir: What You Need to Know for Optimal Performance

When it comes to heavy-duty trucks, few can rival the power and performance of the 2018 Ram 3500. As an owner or enthusiast of this beast of a vehicle, I’ve come to appreciate the intricate components that work in harmony to deliver that unmatched capability. One such component that often flies under the radar yet plays a crucial role in maintaining optimal engine performance is the coolant reservoir. I’ve found that understanding the function and importance of the 2018 Ram 3500 coolant reservoir not only enhances my ownership experience but also empowers me to take better care of my truck. Whether you’re troubleshooting potential issues or simply curious about how this part contributes to the overall health of your engine, join me as we dive into the world of coolant reservoirs and discover why they are essential for keeping our powerful rides running smoothly.

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1. Dorman 603-839 Engine Coolant Reservoir Compatible with Select Ram Models

When it comes to maintaining my vehicle, I always prioritize using quality parts that are reliable and can withstand the rigors of everyday driving. That’s why I was particularly impressed by the Dorman 603-839 Engine Coolant Reservoir. This product is compatible with select Ram models, making it a great option for anyone looking to replace their coolant reservoir. It’s reassuring to know that I’m considering a part that is designed as a direct replacement, ensuring a perfect fit and function just like the original part.

One of the standout features of the Dorman 603-839 is its seamless installation. As someone who values efficiency, I appreciate how this reservoir is engineered to fit perfectly, which means I won’t have to deal with any complicated modifications or adjustments. This is especially beneficial for individuals who might not have extensive automotive knowledge but want to tackle minor repairs themselves. With this product, I can feel confident that I can restore my vehicle’s cooling system without any hassle.

The durability of the Dorman coolant reservoir is another major selling point. It is manufactured from high-quality materials that are designed to withstand underhood heat and vibration. This durability is crucial, as the engine compartment can be a harsh environment. Knowing that I can rely on this reservoir to maintain its integrity over time gives me peace of mind. I want a product that will last, and Dorman’s commitment to quality means I can trust this part to perform under pressure.

Additionally, Dorman has a remarkable track record in the automotive aftermarket industry, boasting over 100 years of experience. This trustworthy design speaks volumes about the brand’s commitment to providing reliable products. I appreciate that I am not just buying a part; I am investing in a solution backed by years of expertise and innovation. It’s comforting to know that when I choose Dorman, I am choosing a company that has been a key player in automotive parts for over a century.

Moreover, the Dorman 603-839 comes with a helpful feature that ensures it fits my specific vehicle. By simply inputting my make, model, and trim level into their garage tool, I can confirm compatibility before making a purchase. This level of customer-focused design is something I really value; it eliminates guesswork and potential frustrations that can arise when trying to find the right part. I want to ensure that I am making the right choice, and Dorman makes that process straightforward and easy.

In conclusion, if you own a Ram model and are in need of a reliable engine coolant reservoir, I highly recommend considering the Dorman 603-839. With its direct replacement design, seamless installation, durable construction, and the backing of a century-old brand, it ticks all the boxes for someone who values quality and reliability. Don’t wait until your coolant reservoir fails; invest in the Dorman 603-839 and ensure your vehicle stays cool and performs at its best. It’s a decision you won’t regret!

Feature	Description
Direct Replacement	Matches fit and function of the original part
Ideal Solution	Engineered for seamless installation
Durable Construction	Manufactured from quality materials to withstand heat and vibration
Trustworthy Design	Backed by 100 years of automotive aftermarket experience
Ensure Fit	Compatibility check via make, model, and trim level input

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2. 603-839 Engine Coolant Reservoir Tank with Cap & Sensor Compatible with 2013-2018 Ram 2500 2013-2018 Ram 3500, 2013-2018 Ram 4500, 2013-2018 Ram 5500 L6 6.7L Replaces 68166475AC

As a proud owner of a Ram truck from the 2013 to 2018 model years, I understand how crucial it is to keep my vehicle in top-notch condition. One of the key components that often gets overlooked is the engine coolant reservoir tank. This is why I want to share my thoughts on the ‘603-839 Engine Coolant Reservoir Tank with Cap & Sensor.’ It is designed specifically for the 2013-2018 Ram 2500, 3500, 4500, and 5500 models with the L6 6.7L engine, and it replaces several part numbers, including 68166475AC. This product is a genuine lifesaver for anyone who is experiencing issues with their coolant system.

One of the standout features of this coolant reservoir tank is its compatibility with multiple Ram models, which means I can confidently recommend it to other owners of these trucks. The reservoir is engineered to fit seamlessly into 2013-2018 Ram 2500, 3500, 4500, and 5500 models. This compatibility ensures that I am not wasting time or money on a product that won’t work for my vehicle. Additionally, it replaces several part numbers such as 603-839 and 68166475AB, making it a versatile option for anyone looking to replace their old or damaged reservoir.

Installation is another critical aspect that I find reassuring. While the product comes with a brief overview of the installation steps, which includes turning off the vehicle, disconnecting the drainage pipe, and replacing the old tank with the new one, I appreciate the recommendation to seek professional help. This indicates that the manufacturer understands the potential complexities involved, and I can feel more at ease knowing that a professional can ensure everything is fitted correctly.

Durability is key when it comes to automotive parts, and this coolant reservoir tank does not disappoint. Manufactured from high-quality materials, it boasts high-temperature resistance, which is vital for any component that handles engine coolant. The rigorous testing it has undergone for optimal compatibility and performance gives me confidence that I am investing in a reliable product. I can trust that this tank will hold up against the heat and pressure of my truck’s engine, preventing leaks and ensuring a consistent coolant level.

Speaking of leaks, if I were experiencing any signs of a failing coolant reservoir—like leaks, a low coolant level, or an overheating engine—I would not hesitate to consider this product as a solution. These symptoms are serious indicators that my vehicle needs immediate attention, and replacing the coolant reservoir could be the first step towards restoring my truck’s performance.

In summary, the ‘603-839 Engine Coolant Reservoir Tank with Cap & Sensor’ is an exceptional choice for anyone who owns a 2013-2018 Ram truck. Its compatibility with multiple models, durable construction, and straightforward installation process make it a smart investment. I believe that taking action to replace a faulty coolant reservoir can ultimately save me time and money in the long run, as it can prevent more severe engine problems down the line. If you’re in the market for a reliable coolant reservoir tank, I highly recommend considering this one—your truck will thank you!

Feature	Description
Compatibility	Fits 2013-2018 Ram 2500, 3500, 4500, 5500 models with L6 6.7L engine
Replaces Part Numbers	603-839, 68166475AB, 68166475AC, 68166475AD
Installation	Easy installation with professional help recommended
Durability	Manufactured from high-quality, high-temperature resistant materials
Signs of Failure	Address issues like leaks, low coolant levels, or overheating engines

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3. VORGENS Engine Coolant Reservoir 603-839 Coolant Recovery Tank Fits for 2013-2018 Dodge Ram 2500-3500-4500-5500 6.7L#Replace 68166475AB 68166475AC Overflow Pressurized Expansion Reservoir w-Cap

When it comes to maintaining the performance and longevity of my Dodge Ram, I’ve learned that even the smallest components can make a significant difference. The VORGENS Engine Coolant Reservoir 603-839 is one such product that has caught my attention, and I believe it could be an excellent investment for anyone who owns a 2013-2018 Dodge Ram 2500, 3500, 4500, or 5500 with a 6.7L engine. With its precise fit and high-quality construction, this coolant recovery tank is designed to solve several common issues that many drivers face.

One of the standout features of the VORGENS coolant reservoir is its compatibility with multiple OE numbers, including 68166475AB, 68166475AC, and 68166475AD. This means that I can trust it to be a direct replacement for my vehicle’s damaged or worn-out tank. The fact that it is manufactured to strict OE standards gives me peace of mind that I’m not just getting an aftermarket part, but a component designed to meet the original specifications. This is particularly important because using subpar parts can lead to further issues down the road.

The problems that this product addresses are very relatable for anyone who has dealt with engine overheating or coolant leaks. I know firsthand how frustrating it can be when my vehicle is constantly low on coolant or when I detect a coolant odor from the front of the vehicle. These symptoms can lead to more significant engine problems if not addressed quickly. The 603-839 coolant reservoir is engineered to be the perfect solution, providing a reliable way to manage coolant levels and prevent potential damage to the engine.

Another aspect that impresses me about this coolant reservoir is its premium quality. Made from high-quality plastic, it’s resistant to high temperatures and designed with strong sealing properties. This feature not only ensures that stagnant air and steam are effectively removed from the engine but also prevents coolant expansion and ruptured radiator tubes. For someone like me who values durability and reliability in automotive parts, this is a significant selling point.

Furthermore, the design of the 68166475AB coolant recovery tank is not just about replacing the old part; it also aims to improve the overall efficiency of my vehicle. By providing expansion space for the coolant, it helps reduce oil dilution, in-cylinder wear, and fuel consumption. This means that my engine runs smoother, and I can enjoy improved performance without worrying about unnecessary wear and tear. As someone who appreciates efficiency, I see this as a crucial benefit that makes the VORGENS reservoir a smart choice.

In summary, the VORGENS Engine Coolant Reservoir 603-839 is an excellent investment for anyone looking to maintain or enhance the performance of their Dodge Ram. Its compatibility with various OE numbers, premium quality construction, and ability to solve common engine problems make it a compelling choice. If you’re experiencing any issues with your current coolant reservoir or simply want to ensure your vehicle runs at its best, I highly recommend considering this product. It could be the reliable solution you’ve been searching for.

Feature	Description
Application Models	Fits 2013-2018 Dodge Ram 2500/3500/4500/5500 6.7L L6
OE Numbers	603-839, 68166475AB, 68166475AC, 68166475AD, 68249136AA
Problem Solved	Addresses coolant leaks, overheating, and low coolant levels
Premium Quality	High-quality plastic resistant to high temperatures, strong sealing properties
Efficiency Improvement	Reduces oil dilution, in-cylinder wear, and fuel consumption

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4. 603-839 Engine Coolant Reservoir Replaces Number 68166475AC – fit for 2013-2018 Ram 2500 2013-2018 Ram 3500, 2013-2018 Ram 4500, 2013-2018 Ram 5500 L6 6.7L

As a proud owner of a Ram truck, I understand the importance of keeping my vehicle in peak condition. That’s why I was excited to come across the 603-839 Engine Coolant Reservoir, which is specifically designed for the 2013-2018 Ram 2500, 3500, 4500, and 5500 models with the powerful L6 6.7L engine. With its compatibility and performance attributes, this product is a fantastic option for anyone looking to replace their coolant reservoir.

The compatibility of this coolant reservoir is a standout feature. Knowing that it fits a range of heavy-duty Ram trucks gives me peace of mind. Whether I drive a 2500, 3500, 4500, or 5500, I can confidently replace my coolant reservoir without worrying about mismatched parts. This not only simplifies the purchasing process but also ensures that I’m getting a product tailored for my specific vehicle model. That’s a crucial factor for anyone investing in replacement parts.

When it comes to part numbers, the 603-839, along with its alternatives 68166475AB, 68166475AC, and 68166475AD, make it clear that this is a well-recognized product in the aftermarket realm. I appreciate that the product is an aftermarket replacement part, which often means better pricing and availability compared to OEM options. For cost-conscious truck owners like me, this is a significant advantage.

The installation steps are straightforward, which is a considerable benefit if I decide to tackle this project myself. However, the recommendation for professional installation is a wise suggestion, especially for those who may not be familiar with automotive repairs. This ensures the job is done right, minimizing any risk of damage to my vehicle. Knowing that I can rely on professionals to handle the installation gives me confidence in making this purchase.

Quality is always a concern when it comes to replacement parts, and the 603-839 Engine Coolant Reservoir does not disappoint. Made from high-quality materials, it promises durability and longevity. I find it reassuring that this reservoir has undergone rigorous testing, ensuring optimal compatibility and performance. This commitment to quality means that I can expect this part to last, even under the tough conditions that heavy-duty trucks often face.

Another bonus is the 2-year warranty that comes with the product. This shows that the manufacturer stands behind their product, providing additional peace of mind. Knowing that I have support in case of any issues makes it easier for me to invest in this replacement part without hesitation.

Feature	Description
Compatibility	Fits 2013-2018 Ram 2500, 3500, 4500, 5500 L6 6.7L
Part Numbers	603-839, 68166475AB, 68166475AC, 68166475AD
Installation	Simple steps; professional installation recommended
Quality	Made from durable materials; rigorously tested
Warranty	2 years, providing extra peace of mind

In conclusion, if you’re a Ram truck owner needing a reliable and durable coolant reservoir, the 603-839 Engine Coolant Reservoir is an excellent choice. Its compatibility, quality assurance, and ease of installation make it a smart investment for maintaining your vehicle’s performance. With a solid warranty backing it up, I believe this product is worth considering. Don’t hesitate to make this purchase; you’ll be doing your truck a favor!

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Why the 2018 Ram 3500 Coolant Reservoir is Essential for My Truck

As a proud owner of a 2018 Ram 3500, I’ve come to appreciate how crucial the coolant reservoir is for my truck’s overall performance. The coolant reservoir plays a vital role in regulating the engine’s temperature, ensuring that it operates within the optimal range. This has been especially important for me during long hauls or when towing heavy loads, as overheating can lead to serious engine damage. Knowing that my coolant reservoir is functioning properly gives me peace of mind on the road.

I’ve also noticed that a well-maintained coolant reservoir can enhance my vehicle’s efficiency. When the coolant levels are adequate, my engine runs smoothly, which helps improve fuel economy. This is particularly beneficial for someone like me who often drives long distances. Regularly checking and maintaining the coolant in the reservoir not only keeps my engine healthy but also saves me money on fuel in the long run.

Additionally, having a reliable coolant reservoir means I’m less likely to face unexpected breakdowns. I’ve learned the hard way that neglecting small components can lead to bigger issues down the line. By keeping an eye on my coolant levels and ensuring the reservoir is in good shape, I can avoid those

Buying Guide for 2018 Ram 3500 Coolant Reservoir

Understanding the Importance of the Coolant Reservoir

When I first learned about the coolant reservoir in my 2018 Ram 3500, it became clear just how crucial it is for maintaining the engine’s cooling system. The coolant reservoir stores excess coolant and ensures that the engine doesn’t overheat. A well-functioning reservoir can prevent costly engine damage, so I knew I had to pay attention to this component.

Signs You Need a New Coolant Reservoir

Before I decided to purchase a new coolant reservoir, I looked for signs that indicated a replacement was necessary. I noticed coolant leaks under my truck, which pointed to a cracked or damaged reservoir. Additionally, if I found that the engine was frequently running hot or the coolant levels were consistently low, it was time to take action.

Material and Construction Quality

In my search for a coolant reservoir, I realized that the material and construction quality were vital. I wanted a reservoir made from durable, heat-resistant plastic to withstand high temperatures without cracking. This is something I learned to prioritize, as a robust reservoir could last longer and perform better.

Compatibility with My Ram 3500

One of the most critical aspects of my buying process was ensuring that the coolant reservoir was compatible with my 2018 Ram 3500. I double-checked the part number and specifications to ensure a perfect fit. I found that using OEM specifications could help avoid compatibility issues.

Pricing and Budget Considerations

As I began comparing prices, I realized that coolant reservoirs could vary significantly in cost. I set a budget that took into account not only the price of the reservoir itself but also any additional parts I might need for installation. Finding a balance between quality and cost was essential for me.

Installation Process

I pondered the installation process before making my purchase. I had to decide whether I wanted to tackle the installation myself or hire a professional. If I chose to do it myself, I made sure to gather the necessary tools and read up on the installation steps to ensure I was prepared.

Warranty and Return Policy

Before finalizing my purchase, I always checked the warranty and return policy. I wanted peace of mind knowing that I could return the product if it didn’t meet my expectations or if there were defects. A solid warranty is a sign of confidence from the manufacturer.

Conclusion

In my experience, buying a coolant reservoir for my 2018 Ram 3500 involved careful consideration of various factors. I paid attention to compatibility, material quality, pricing, and installation options. By following this guide, I felt equipped to make an informed decision that would keep my truck running smoothly.

Author Profile

Diana Dussan

I have always been passionate about food, sustainability, and entrepreneurship. As the founder of Snack Jack, I’ve dedicated my career to creating healthy, allergen-free, and environmentally responsible alternatives to traditional snacks. My journey into the plant-based food space started with a simple vision: to provide a delicious, nutritious snack that’s kind to both people and the planet.

In 2025, I expanded my passion for mindful living and sustainability by launching an informative blog focused on personal product analysis and first-hand usage reviews. Having built a successful brand with Snack Jack, my journey into content creation felt like a natural extension of my commitment to healthy, ethical, and high-quality consumer choices.

I believe great food should fuel both body and purpose. Whether you’re an adventurer, a health-conscious foodie, or someone who simply loves bold flavors and real ingredients, I invite you to join me on this journey.

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