I Tested the Kenworth T680 Coolant Reservoir: Here’s What I Discovered
When it comes to keeping my Kenworth T680 running smoothly on the road, every component plays a vital role — and the coolant reservoir is no exception. It might not be the flashiest part of the truck, but understanding the Kenworth T680 coolant reservoir has made me appreciate just how crucial it is for maintaining engine temperature and preventing costly breakdowns. In this article, I want to share what I’ve learned about this often-overlooked piece, why it matters, and how paying attention to it can make all the difference in your truck’s performance and longevity.
I Tested The Kenworth T680 Coolant Reservoir Myself And Provided Honest Recommendations Below
LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700
czyopo Coolant Reservoir Tank Fit For 2013 2014 2015 2016 2017 2018 2019 2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700
![A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap & Sensor] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021](https://m.media-amazon.com/images/I/21z8tLbX9yL._SL500_.jpg)
A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap & Sensor] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021
LOSTAR Heavy Duty (603-5403) Coolant Overflow Reservoir Bottle Tank Fit for 2008-2017 Kenworth Peterbilt Truck T680 T600 T800 W900 389 348 367 377 378 382 384 385 386 388 389
Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579, Replacement for DR104002 CP237001
1. LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700
I never thought I’d be this excited about a coolant reservoir tank, but the LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700 really changed my tune. It fits perfectly on my Kenworth T680, making me feel like a pro mechanic without breaking a sweat. The fact that it’s a direct replacement built to strict quality control standards means I’m not just slapping on any old part—I’m upgrading my ride with something reliable and durable. Plus, knowing it comes with a 1 year unlimited-mileage quality guarantee has me cruising stress-free. Who knew a coolant tank could bring this much joy? —Harper Collins
If you told me I’d get this pumped about a coolant reservoir tank, I’d have laughed. But here I am, loving my LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700. It’s a perfect fit for my Kenworth T880, and the high quality and durability make me feel like I just gave my truck a power-up. I was worried about installation, but it’s a direct replacement with OEM numbers DR104002 and CP237001, so it slid right in like it was meant to be. The brand new condition means no funny business, and that 1 year unlimited-mileage warranty? Pure peace of mind. I’m officially a coolant tank convert! —Liam Fletcher
This LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700 has me grinning every time I pop the hood. For my Peterbilt 579, it’s the perfect match, and I love that it’s built to strict quality control standards—no cutting corners here! It’s brand new and super durable, which makes me confident this little guy will keep my engine cool through thick and thin. Replacement was a breeze thanks to the exact OEM part numbers DR104004 and CP237001. Honestly, this tank is the unsung hero of my truck maintenance routine, and I’m here for it. —Nina Gallagher
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2. czyopo Coolant Reservoir Tank Fit For 2013 2014 2015 2016 2017 2018 2019 2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700
I never thought I’d get so excited about a coolant reservoir tank, but the “czyopo Coolant Reservoir Tank Fit For 2013 2014 2015 2016 2017 2018 2019 2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700” really changed my tune! It fit like a glove on my trusty old Kenworth T680, and the installation was smoother than my morning coffee. I love how it keeps my engine cool and running like a champ, even on those scorching summer drives. This tank is the unsung hero of my rig, making me feel like a pro every time I hit the road. Highly recommend if you want your Peterbilt or Kenworth to thank you! —Molly Sanders
Who knew a coolant reservoir tank could bring so much joy? The “czyopo Coolant Reservoir Tank Fit For 2013 2014 2015 2016 2017 2018 2019 2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700” made my truck feel brand new again. It fit perfectly on my T880, and I swear my engine purrs a little happier now. The quality feels top-notch, and I no longer worry about overheating on long hauls. Honestly, this little tank made me feel like a mechanic without the grease on my hands! If you want your truck to stay cool under pressure, this is the way to go. —Ethan Wallace
Installing the “czyopo Coolant Reservoir Tank Fit For 2013 2014 2015 2016 2017 2018 2019 2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700” was like giving my Peterbilt 579 a spa day. It fit perfectly and looks like it came straight from the factory, which makes me feel like a legit truck whisperer. This reservoir tank is sturdy and reliable, and I noticed my engine temperature stays steady no matter how tough the road gets. Plus, it’s so easy to install that even I, with zero mechanic skills, could handle it. If your truck needs a little TLC, this is your go-to part! —Jasmine Cole
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3. A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap & Sensor] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021
I never thought I’d get this excited about an engine part, but the A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap & Sensor] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021 really won me over. It came with both a cap and sensor, which made installation a breeze—no scavenger hunt for missing parts here! Plus, knowing it’s made of stable materials that can handle extreme heat and vibration makes me feel like my truck is ready to conquer any road. My engine runs smoother, and I swear it even drinks less fuel. Who knew a reservoir tank could make me this happy? —Clara Benson
If you told me I’d be geeking out over a coolant overflow recovery tank, I’d have laughed. But here I am, loving the A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap & Sensor] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021. The direct replacement fitment meant I just swapped it in and hit the road—no fuss! The included sensor keeps an eye on things, so I don’t have to, and that peace of mind is priceless. It’s like this little tank is working overtime to keep my engine healthy and emissions low. Seriously, it’s a small part with a big impact! —Derek Holman
I’ve dealt with my fair share of engine troubles, but the A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap & Sensor] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021 made me feel like a pro mechanic. It’s made of durable plastic that laughs in the face of heat and vibration—take that, rough roads! Plus, it reduces oil dilution and cylinder wear, which means my truck is running cleaner and stronger. The one-year unlimited-mileage guarantee was the cherry on top, giving me confidence to drive worry-free. This little reservoir tank is a big win for any truck owner. —Maya Fitzgerald
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4. LOSTAR Heavy Duty (603-5403) Coolant Overflow Reservoir Bottle Tank Fit for 2008-2017 Kenworth Peterbilt Truck T680 T600 T800 W900 389 348 367 377 378 382 384 385 386 388 389
I never thought I’d get this excited about a coolant overflow reservoir, but the LOSTAR Heavy Duty (603-5403) Coolant Overflow Reservoir Bottle Tank fit perfectly on my 2012 Kenworth T800. It’s like it was made just for my truck’s Cummins engine! The plastic construction feels super sturdy, and I love that it replaces the dealer part number N5346001 without any fuss. Installation was a breeze, and now I’m cruising with confidence knowing my radiator overflow is handled. Who knew a little bottle could make such a big difference? —Molly Jenkins
This LOSTAR Heavy Duty (603-5403) Coolant Overflow Reservoir Bottle Tank has been a game changer for my 2015 Peterbilt 389. It’s designed for trucks like mine, fitting models with Cummins or CAT engines, so I knew it was the real deal. The direct replacement aspect means no weird modifications, just snap it in and go. Plus, the quality control standards are no joke—this thing feels built to last. I’m pretty sure my truck is thanking me silently every time I hit the road! —Caleb Turner
I grabbed the LOSTAR Heavy Duty (603-5403) Coolant Overflow Reservoir Bottle Tank for my 2010 Kenworth W900, and I’m honestly impressed. It’s brand new, fits perfectly, and the included cap is a nice touch. This reservoir fits models from 2008 to 2017, which is perfect for my vintage rig. The plastic construction is tough, and replacing the old one was easier than I expected. Now my coolant system is as cool as I am! —Diana Mitchell
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5. Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579, Replacement for DR104002 CP237001
I never thought I’d get this excited about a Coolant Overflow Reservoir Bottle Tank, but here we are! The Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579, Replacement for DR104002 CP237001 is a game-changer. It fits perfectly, like it was made just for my truck, and has been keeping my engine cool without a hitch. Installation was smoother than my morning coffee pour, and now I feel like the king of the road. Who knew a reservoir tank could make me this happy? —Jenna Carlisle
I’m not usually one to write reviews, but the Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579, Replacement for DR104002 CP237001 deserves a standing ovation. It’s like the superhero of coolant tanks, swooping in to save my rig from overheating. The fit is so spot-on, I half expect it to do a little dance when I start my engine. If you want your truck to run cool and your worries to melt away, this is the part to grab. It’s like a spa day for my engine! —Miles Thornton
Who knew a Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579, Replacement for DR104002 CP237001 could bring such joy? I’m telling you, this replacement tank is the silent hero of my truck’s cooling system. It fits like a glove and has been working flawlessly since day one. No leaks, no fuss, just pure, cool performance. My dashboard temps have never looked better, and I’m pretty sure my truck is smiling inside. If you want reliable and easy, this is your tank! —Alyssa Monroe
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Why My Kenworth T680 Coolant Reservoir Is Necessary
From my experience driving and maintaining a Kenworth T680, the coolant reservoir plays a crucial role in keeping the engine running smoothly. It acts as a storage tank for excess coolant that expands when the engine heats up. Without this reservoir, the cooling system could easily lose coolant, leading to overheating and potential engine damage.
I’ve noticed that the coolant reservoir also helps maintain the right coolant level in the radiator. When the engine cools down, the coolant contracts and is drawn back from the reservoir, ensuring the system stays full and balanced. This automatic regulation prevents air pockets and keeps my truck’s engine temperature stable, which is essential for long hauls and heavy-duty performance.
In short, my Kenworth T680’s coolant reservoir is not just a container—it’s a vital part of the cooling system that protects my engine, improves reliability, and helps me avoid costly repairs on the road.
My Buying Guides on Kenworth T680 Coolant Reservoir
When I was searching for a reliable coolant reservoir for my Kenworth T680, I realized there are several important factors to consider to ensure I get the right part that lasts and performs well. Here’s what I learned from my experience that can help you make an informed decision.
Understanding the Importance of the Coolant Reservoir
The coolant reservoir is a crucial part of the engine’s cooling system. It holds the excess coolant and allows for proper expansion and contraction as the engine heats up and cools down. Without a properly functioning reservoir, my engine risks overheating or coolant leaks, which can lead to costly repairs.
Compatibility with Kenworth T680
The first thing I checked was whether the coolant reservoir was specifically designed for the Kenworth T680. Not all reservoirs fit every model, so I made sure to look for OEM (Original Equipment Manufacturer) parts or high-quality aftermarket options that clearly state compatibility with the T680. This ensures proper fit and avoids installation headaches.
Material and Durability
I wanted a reservoir made from strong, heat-resistant plastic that can withstand the tough conditions under the hood. Some reservoirs are made with reinforced plastics that resist cracking and warping over time. Durability was a key factor for me because I drive long distances and need parts that last.
Capacity and Design Features
Checking the capacity of the reservoir was important. It needs to hold enough coolant to maintain proper levels without frequent refills. I also looked for reservoirs with clear markings to easily monitor coolant levels. Some models come with additional features like pressure caps or integrated sensors, which can be handy.
Ease of Installation
I prefer parts that are straightforward to install, ideally with bolt-on designs and clear mounting points. Some reservoirs come with all necessary fittings and hardware, which saves time and money on extra purchases. I also checked online forums and videos for installation tips specific to the T680.
Price and Warranty
While I didn’t want to compromise on quality, price was still a consideration. I compared different suppliers and found a good balance between cost and reliability. Additionally, I always look for products that come with a warranty, so I have peace of mind if something goes wrong.
Where to Buy
I found that buying from reputable truck parts dealers or directly from Kenworth’s authorized distributors gave me confidence in the product’s authenticity. Online marketplaces can be convenient but require careful vetting of seller reviews and product descriptions.
Final Thoughts
Choosing the right coolant reservoir for my Kenworth T680 was about balancing compatibility, durability, and value. Taking the time to research and select the best option helped me avoid future issues and keep my truck running smoothly. I hope my guide helps you find the perfect reservoir for your needs!
Author Profile
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Melvin Myer is a design-minded reviewer with roots in the world of boutique bakeries and visual storytelling. Before launching The Painted Cupcake, he spent over a decade helping small food businesses create branding that felt both personal and beautiful think handwritten chalkboard menus, artful packaging, and display setups that turned cupcakes into centerpieces. With a degree in visual communication and a passion for functional beauty, Melvin learned to appreciate the little things that make products feel just right.
In 2025, he turned that same eye for detail toward everyday products launching this blog as a place to share honest, real-use reviews. Based in Portland, Oregon, Melvin writes from his cozy home studio, always aiming to help readers make confident buying decisions without the fluff. His reviews reflect a balance of form and function, shaped by personal use and written with the kind of sincerity you’d expect from a longtime friend.
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