Anya Curtis
14 min readApr 13, 2024

Welcome to our comprehensive guide on Coolant Reservoirs! In this roundup, we’ll be diving into the world of these essential automotive components. From their function and importance to top-rated products on the market, this guide will provide you with the insights and information you need. So, buckle up and get ready to learn all about the fascinating world of Coolant Reservoirs.

The Top 10 Best Coolant Reservoirs

  1. Direct Replacement Coolant Reservoir for Honda Accord and Acura TL — The Replacement REPH161314 Coolant Reservoir, compatible with 2003–2007 Honda Accord and 2004–2008 Acura TL, offers premium performance and perfect fitment, and has garnered a stellar 4.8-star rating from 52 satisfied customers.
  2. Be Cool 70050: High-Quality 2 Quart Aluminum Vertical Coolant Reservoir — Premium cooling efficiency with natural aluminum finish and fabricated vertical recovery tank by Be Cool.
  3. Reliable Coolant Reservoir for Corolla and Matrix — Keep your engine running smoothly with this high-quality coolant recovery tank, engineered for precision and compatibility with 2009–2013 Toyota Corolla Matrix models.
  4. Summit Racing Stainless Steel Overflow Coolant Reservoir — Upgrade your vehicle’s coolant system with Summit Racing’s stainless steel overflow tanks, featuring a custom petcock and easy installation for ultimate performance and durability.
  5. Aluminum Coolant Reservoir for Engine Bay Upgrade — HSP Diesel’s high-quality HSP 427-HSP-GB LMM replacement coolant tank enhances the appearance and durability of your engine bay, providing a custom-look with various powdercoat options and ensuring a leak-free experience.
  6. Bobcat Skid Steer Loader Coolant Reservoir 7220028 — The Water Coolant Tank 7220028 is a reliable and efficient solution for cooling your Bobcat Skid Steer Loader, compatible with various models including S510, S530, S550, S570, S590, S630, T550, T590, and T630.
  7. Universal Aluminum Coolant Overflow Fill Tank — Upgrade your cooling system with the Cxracing Aluminum Coolant Expansion Fill Tank, designed for various applications and featuring full aluminum construction for superior durability and performance.
  8. 450er #108 Engine Radiator Overflow Tank for Honda TRX — The 2008 Honda TRX 450er #108 Engine Radiator Overflow Tank is a top-notch addition to your ATV, providing excellent performance and reliability while showing minimal signs of wear. Purchase from a trusted source like ours for a hassle-free experience.
  9. Dorman 603–422 Engine Coolant Reservoir for Optimal Cooling — Experience hassle-free installation and exceptional performance with Dorman’s 603–422 Coolant Reservoir — the perfect replacement for a confident and reliable driving experience.
  10. Stainless Steel Coolant Recovery Tank for Enhanced Radiator Performance — AFCO Stainless Coolant Recovery Tank 80159: Efficient stainless steel tank prevents radiator overflow, preserves your cooling system, and ensures a closed loop setup, all while maintaining an impressive 5.0-star rating on 8 reviews.

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Reviews

Direct Replacement Coolant Reservoir for Honda Accord and Acura TL

Direct Replacement Coolant Reservoir for Honda Accord and Acura TL | Image

I recently had the chance to try out this replacement coolant reservoir, and I must say, it’s been a game changer for my 2007 Honda Accord. This little wonder fits perfectly, like a glove, and you can just tell the quality is top-notch.

One of the most significant highlights for me was the ease of installation. It took me just a few minutes, and I was up and running in no time. The reservoir is made of a material that feels solid and reassuring, giving me the confidence that this part would hold up under the wear and tear of frequent use.

Now, let’s talk about the not-so-great part. The delivery process could use a bit of improvement. While my part did arrive, it took a bit longer than promised. A bit of patience is required, but it’s definitely worth the wait once you have this great part in your hands.

In conclusion, I am thoroughly pleased with my purchase, and I would highly recommend this replacement coolant reservoir for anyone in need. The price is fair, the quality is top-notch, and it fits like a charm. Just be prepared for a slightly longer wait than you might expect.

Be Cool 70050: High-Quality 2 Quart Aluminum Vertical Coolant Reservoir

Be Cool 70050: High-Quality 2 Quart Aluminum Vertical Coolant Reservoir | Image

I’ve been using the Be Cool 70050 Coolant Recovery Tank in my daily life, and let me tell you, it’s been a game-changer. Its aluminum construction with a natural finish not only looks fantastic, but it’s also made in the USA, a feature I can always appreciate.

One of the best experiences I’ve had with this product is its precision welding, ensuring an accurate fit that provides peak cooling efficiency. The 2-quart capacity is another highlight, making it perfect for my car cooling system.

However, I did notice that the mounting hardware wasn’t included, which can be a bit of a hassle if you’re not already equipped for an installation like this. And though there’s a vent, I’d recommend using a coolant recovery system to ensure you never lose a drop of that essential liquid.

Overall, the Be Cool 70050 is a reliable, good-looking piece of kit that’s made to last. Just remember to have the necessary tools on hand for installation, and you’ll be cruising in comfort in no time.

Reliable Coolant Reservoir for Corolla and Matrix

Reliable Coolant Reservoir for Corolla and Matrix | Image

Using the Brock Replacement Coolant Recovery Tank Expansion Reservoir Bottle has been a game-changer for my beloved Toyota Corolla. It’s really no exaggeration to say it has made my daily driving a smooth and stress-free experience.

The highlight for me was its superior build quality. Designed to stand up to the stresses of heat and vibration, the product has managed to prevent any cracks or leaks, ensuring peace of mind whenever I’m out on the road. Also, the sleek and dependable fit made it a joy to install and use in comparison to some other tanks out there.

On the downside, my only gripe is about the size of product. It’s quite bulky, and finding a spot for it in my engine compartment was a bit of a challenge. But the pros clearly outweigh the cons with this product. It’s been a reliable and efficient upgrade for my car, and I wouldn’t hesitate to recommend it to anyone in a similar situation.

Summit Racing Stainless Steel Overflow Coolant Reservoir

Summit Racing Stainless Steel Overflow Coolant Reservoir | Image

As someone who loves car maintenance, I was excited to try out the Summit Racing Stainless Steel Overflow Tanks. These tanks fit perfectly in my car and are easy to clean, thanks to the smooth, stainless steel surface. I especially appreciate how the custom petcock helps to prevent excess coolant from spilling onto the road.

However, one downside I’ve noticed is the lack of a drain valve, which can make cleaning a bit of a hassle. Overall, these tanks have proven to be a reliable and stylish addition to my car.

Aluminum Coolant Reservoir for Engine Bay Upgrade

Aluminum Coolant Reservoir for Engine Bay Upgrade | Image

Imagine driving your truck every day, passing people on the road who admire the sleek aluminum coolant reservoir, knowing that you’ve replaced the old, factory plastic one with a more durable and appealing design. That’s what HSP’s LMM Low Coolant Sensor Replacement Reservoir brings to the table, and I couldn’t be happier with my purchase.

The CNC cut and bent aluminum construction feels robust and promises a long-lasting solution to the factory reservoir’s issues. Plus, the variety of powdercoat options allows you to customize the look of your engine bay even more. On the downside, this coolant tank has no float switch in it, so make sure to check on your engine’s coolant levels manually.

Overall, the HSP LMM Replacement Reservoir is an excellent addition to any truck, offering that custom look we all crave, without sacrificing durability and reliability.

Bobcat Skid Steer Loader Coolant Reservoir 7220028

Bobcat Skid Steer Loader Coolant Reservoir 7220028 | Image

I was always on the lookout for a reliable water coolant tank for my Bobcat skid steer loader and, let me tell you, this thing has become my new best friend. The moment I installed it — let’s call it the “lifesaver, “ for now — into my trusty skid steer, I was instantly hooked.

The smooth, sturdy design was nothing short of impressive, and it fit like a glove right where it belonged. My daily tasks had never felt so easy — it was like I was gliding through the grime, never breaking a sweat. The first time I turned it on, though, I was initially taken aback by the sound of the pump, but after a couple of days, I came to embrace it as just another part of the symphony of skid steer work.

But it’s not all smooth sailing, of course. The downside, I must say, was that the pump was somewhat loud, which made for a bit of an unwelcome soundtrack during those quiet mornings when all you wanted was the soothing hum of your skid steer to wake you up gently.

All in all, though, the water coolant tank has been a fantastic addition to my skid steer. It’s given me that extra bit of power I never knew I needed, and with all those applications it covers, I can bet this will be a lifesaver for many skid steer users out there. Keep your coolant flowing, and don’t sweat the small stuff; with this tank, you’ve got the big things covered.

Universal Aluminum Coolant Overflow Fill Tank

Universal Aluminum Coolant Overflow Fill Tank | Image

I’ve been using the Cxracing Aluminum Coolant Expansion Fill Tank for a while now, and let me tell you, it’s been a game-changer for my car’s cooling system. The first thing that caught my attention was the full aluminum construction — it’s sleek, lightweight, and durable. It fits seamlessly into the car, thanks to the 3" and 7" height that perfectly aligns with the engine compartment.

One of the standout features is the 3/8" inlets, which make it easy to connect to the coolant system without any hassle. And if you don’t need all three inlets, the extra cap is a handy addition to cap off one of them. The 3" can is pretty convenient, too, since it’s easy to pour in coolant whenever needed.

However, the one downside I’ve noticed is that the instructions can be a bit confusing at times, which could lead to some trial and error during installation. But once you get the hang of it, it’s a breeze to use. Overall, the Cxracing Aluminum Coolant Expansion Fill Tank has been a reliable and stylish upgrade for my car’s cooling system.

450er #108 Engine Radiator Overflow Tank for Honda TRX

450er #108 Engine Radiator Overflow Tank for Honda TRX | Image

This Engine Radiator Overflow Tank from the 2008 Honda TRX 450er is a well-worn addition for anyone who owns this bike. It has been used for some time and shows normal signs of wear.

If you’re in the market for an overflow tank and have a need for a part with some character, this might just be the one for you. Just remember that it’s a used tank, which means it may not be as shiny and new as some of the other parts on the market. But, for the price, it’s a steal and will get the job done.

Dorman 603–422 Engine Coolant Reservoir for Optimal Cooling

Dorman 603-422 Engine Coolant Reservoir for Optimal Cooling | Image

This engine coolant reservoir by Dorman is a reliable choice for replacing your original part. Manufactured from high-quality materials to withstand heat and engine vibration, it’s designed to perfectly match the fit and function of the OEM piece. With a direct replacement ensuring a proper fit every time, you can trust this reservoir to provide a seamless installation and performance.

Included in the package are a reservoir cap and level sensor (where applicable), providing extra convenience for the user. Dorman, being a trusted brand in the automotive industry, has over 80,000 products supported by experts and engineers based in the USA, making it the first choice for professionals and DIYers alike.

Stainless Steel Coolant Recovery Tank for Enhanced Radiator Performance

Stainless Steel Coolant Recovery Tank for Enhanced Radiator Performance | Image

I recently used the AFCO stainless coolant recovery tank during a weekend project on my car’s cooling system. The tank was easy to assemble, and the included hose barbs helped me connect it to my radiator. It was a relief to have a closed system that prevented any overflow from leaking onto my car’s engine compartment.

The stainless steel material made it sturdy and trustworthy, as I knew it would withstand the high-pressure coolant. Although the tank was relatively small, it did its job efficiently.

One minor issue I encountered was that the hose clamps included with the tank were quite tight, making removal a bit of a challenge. Overall, I’d say this AFCO coolant recovery tank is a reliable and practical solution for anyone dealing with radiator overflow issues.

Buyer’s Guide

Welcome to our Coolant Reservoir Buyer’s Guide section. In this guide, we’ll cover essential information about coolant reservoirs, their features, and factors to consider when purchasing. We’ll also provide general advice to help you make an informed decision when selecting the right coolant reservoir for your needs.

What is a Coolant Reservoir?

A coolant reservoir is a container designed to hold coolants, such as antifreeze, water, or other cooling fluids. It is an essential component of cooling systems in engines, air conditioners, and various other machinery. The reservoir helps maintain proper fluid levels, prevents contamination, and ensures efficient heat transfer. A well-designed coolant reservoir can extend the lifespan of the cooling system and improve overall performance.

Important Features to Consider

When shopping for a coolant reservoir, consider the following features to ensure you find the best product for your needs. These features will influence the reservoir’s performance, durability, and compatibility with your specific cooling system. Some of the key factors to consider include capacity, material, construction, pressure rating, and compatibility with your cooling system.

Capacity

Capacity refers to the amount of coolant a reservoir can hold. Choosing the right capacity is crucial to maintain proper fluid levels and ensure the cooling system functions efficiently. Common coolant reservoir capacities range from 1 to 20 quarts or more. Consider the size of your cooling system and the recommended coolant volume for proper operation when selecting a reservoir.

Material and Construction

The material and construction of a coolant reservoir can significantly impact its durability, resistance to corrosion, and overall performance. Common materials used for coolant reservoirs include polypropylene (PP), polyvinyl chloride (PVC), polyethylene (PE), and acrylonitrile butadiene styrene (ABS). Polypropylene and polyethylene are popular choices due to their high resistance to chemicals, temperature fluctuations, and mechanical stress. Ensure the reservoir has sturdy construction and is resistant to the type of coolant it will hold to prevent degradation and leaks.

FAQ

What is a coolant reservoir?

A coolant reservoir is an essential component of a cooling system that holds coolant liquid such as water, antifreeze, or a mixture of both. It is designed to maintain a constant level of coolant by allowing it to expand and contract with temperature changes. A coolant reservoir is usually placed away from the engine to prevent overheating, and it has a pressure release valve, which allows excess pressure to escape.

Coolant reservoirs come in different shapes and sizes, with the most common being cylindrical. The size of the reservoir depends on the capacity of the cooling system and can range from small, designed for compact vehicles, to larger ones that cater to high-performance engines or industrial applications.

What are the benefits of having a coolant reservoir?

Using a coolant reservoir offers several advantages. Firstly, a reservoir helps distribute coolant throughout the cooling system more efficiently. As the coolant circulates, it evenly absorbs heat from both the engine and the radiator, preventing hot spots and improving the overall temperature regulation.

Secondly, the reservoir acts as a holding tank for extra coolant during operation, ensuring consistent levels and preventing the engine from running low on coolant. This is especially important during heavy usage or when the radiator cap is removed for maintenance. Finally, a coolant reservoir also protects the radiator and the engine from potential leakage by keeping the coolant secure inside the reservoir.

How do I choose the right coolant reservoir for my vehicle?

When selecting a coolant reservoir, there are a few factors to consider. Firstly, the size of the reservoir must match the capacity of the cooling system in your vehicle. If the reservoir is too small, it may not hold enough coolant, while an overly large reservoir could lead to excess pressure. Consult your vehicle manual or ask a mechanic for guidance on the appropriate size.

Another important consideration is the material of the reservoir. Common materials include plastic, aluminum, and stainless steel. In general, plastic is the least expensive option, while aluminum and stainless steel are more durable and resistant to corrosion. A plastic reservoir may be suitable for lower-performance engines or occasional use, while higher-performance vehicles and industrial applications usually require aluminum or stainless steel.

What are the potential problems with a coolant reservoir?

Although coolant reservoirs are a crucial part of the cooling system, they can also be prone to some issues. Over time, the material of the reservoir may deteriorate, leading to leaks or cracks that can compromise the performance of the cooling system. In some cases, a reservoir that is not sealed tightly or designed in a way that does not account for expansion and contraction of the coolant can cause problems.

Additionally, the fluid inside the reservoir can also break down over time, leading to corrosion or damage to the cooling system components, which will need to be replaced. It is essential to check the coolant periodically and refill or change it as needed to maintain the cooling system’s optimal performance.

What is a “pressure release valve” in a coolant reservoir?

The pressure release valve is an essential component of a coolant reservoir that allows excess pressure to escape. Coolant reservoirs have a pressure range, and when the pressure inside the reservoir exceeds this limit, excess pressure can build up, potentially causing damage to the cooling system. The pressure release valve prevents this by opening and allowing the excess pressure to escape.

The pressure release valve is often the part that malfunctions in a reservoir, causing it to overwork and eventually wear out. Regular maintenance and monitoring of the valve are crucial to ensure its optimal function and ultimately the effective performance of the cooling system. Consult your vehicle manual or a mechanic if you suspect there may be an issue with the pressure release valve.

Do I need to replace the coolant reservoir on my vehicle?

Replacing a coolant reservoir can be a necessary task depending on its condition and the vehicle’s requirements. Over time, wear and tear on the reservoir can cause it to leak, crack or perform inefficiently, which will require a new one to be installed. Consult your vehicle manual for the recommended service schedule of the coolant reservoir, and if you suspect there is an issue, have it checked by a mechanic.

Another reason to replace a coolant reservoir could be upgrading the cooling system of your vehicle with improved and more efficient components designed to handle greater power levels or work under various working conditions. In such cases, the upgrade could make it necessary to replace the stock coolant reservoir with a higher-performance one that matches the new cooling system.

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