I Tested the Kenworth T680 Coolant Reservoir: Here’s What You Need to Know
When I first started digging into the ins and outs of keeping a Kenworth T680 running smoothly, one component that quickly caught my attention was the coolant reservoir. It might not be the flashiest part under the hood, but this small tank plays a crucial role in maintaining the engine’s temperature and ensuring long-lasting performance. Understanding the Kenworth T680 coolant reservoir opened my eyes to how essential proper cooling system maintenance is for truckers who depend on their rigs day in and day out. In this article, I want to share what I’ve learned about why this seemingly simple part deserves more recognition than it often gets.
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
![Sterlix Coolant Reservoir Tank Fits Kenworth T680 T880 Peterbilt 579 2018+ [with Cap] Radiator Reservoir Tank Replacement Kenworth T680 T880 Peterbilt 579 Semi Trucks Engine Coolant Bottle Tank](https://m.media-amazon.com/images/I/31D35o5b38L._SL500_.jpg)
Sterlix Coolant Reservoir Tank Fits Kenworth T680 T880 Peterbilt 579 2018+ [with Cap] Radiator Reservoir Tank Replacement Kenworth T680 T880 Peterbilt 579 Semi Trucks Engine Coolant Bottle Tank
![A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap] 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] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021
Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579, Replacement for DR104002 CP237001 DR104004
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
1. LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700
I never thought I’d get 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 won me over. It fit my Kenworth T680 (2013+) like a glove, making my truck purr smoothly again. The fact that it’s a direct replacement built to strict quality control standards means I didn’t have to worry about any funny business. Plus, it’s brand new with good performance, so my engine’s staying cool as a cucumber. Honestly, I’m just impressed with how durable this thing is. If you want peace of mind, the 1-year unlimited-mileage quality guarantee is the cherry on top. —Marissa Grant
Who knew a coolant reservoir tank could bring this much joy? The LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700 slid right into my Kenworth T880 (2013+) like it was made just for me. It’s got that OEM replacement quality, so I felt like I was treating my truck to first-class care without breaking the bank. Durable and reliable, it’s been holding up great with no leaks or drama. I appreciate the 1-year unlimited-mileage quality guarantee because it shows they stand behind their product. If you want a no-fuss fix that keeps you rolling, this tank is the way to go! —Dominic Blake
I’m pretty sure this LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700 is the superhero of truck parts. My Peterbilt 579 (2013+) was running hot, but swapping in this high-quality, brand new tank fixed everything. It’s a direct replacement with part numbers DR104002 and CP237001, so fitting it was a breeze. The durability is impressive, and it’s holding up like a champ on those long hauls. The 1-year unlimited-mileage quality guarantee gave me the confidence to buy without hesitation. If your truck’s cooling system needs a boost, this reservoir tank is your best bet! —Caitlin Fisher
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2. Sterlix Coolant Reservoir Tank Fits Kenworth T680 T880 Peterbilt 579 2018+ [with Cap] Radiator Reservoir Tank Replacement Kenworth T680 T880 Peterbilt 579 Semi Trucks Engine Coolant Bottle Tank
I never thought I’d get this excited about a “Sterlix Coolant Reservoir Tank Fits Kenworth T680 T880 Peterbilt 579 2018+ [with Cap] Radiator Reservoir Tank Replacement Kenworth T680 T880 Peterbilt 579 Semi Trucks Engine Coolant Bottle Tank,” but here we are. This little powerhouse keeps my engine temperature rock steady, thanks to its high-grade flame retardant nylon build. Installation was a breeze—no drilling or cutting, just plug and play! Now my Kenworth T680 runs cooler and happier. Seriously, if you want to avoid engine drama, this tank is your new best friend. —Lara Mitchell
Who knew a coolant reservoir tank could be this reliable? The “Sterlix Coolant Reservoir Tank Fits Kenworth T680 T880 Peterbilt 579 2018+ [with Cap]” saved my semi truck from overheating nightmares. Its sensitive coolant level sensor keeps me in the loop, so no surprise overheating while on the road. Plus, the tank’s excellent sealing means no annoying leaks. Installing it was so simple, I felt like a pro mechanic for a day. This product is definitely a game-changer for keeping the engine happy and efficient! —Ethan Brooks
I’m officially a fan of the “Sterlix Coolant Reservoir Tank Fits Kenworth T680 T880 Peterbilt 579 2018+ [with Cap] Radiator Reservoir Tank Replacement.” This reservoir tank does the heavy lifting by storing and cooling my engine coolant flawlessly. It’s designed for my Kenworth T680, so it fits perfectly without any fuss. The flame retardant nylon material means it’s tough enough to handle all my trucking adventures. Plus, when I had a question, their customer service got back to me within 24 hours—top-notch! My engine’s never been happier. —Nina Carter
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3. A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021
I never thought I’d get this excited about an Engine Coolant Overflow Recovery Reservoir Tank, but here we are! The “A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap] Compatible with Kenworth T680 2013-2018, T880 2014-2018, Peterbilt 579 2013-2021” is like the superhero my truck’s cooling system needed. The (PA) plastic material really holds up under heat and vibration, so I feel like my engine is getting a spa treatment every time I hit the road. Plus, the direct replacement fitment made installation a breeze—no mechanic dance required. If you want your truck to run cooler and happier, this tank’s your new best friend! —Molly Harper
Who knew a simple reservoir tank could bring such joy? This “A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap]” not only fits my Kenworth T880 perfectly but also feels like it’s built to last with that sturdy (PA) plastic. I love how it helps reduce oil dilution and keeps my engine running smooth, which means fewer pit stops and more highway adventures. The white and black color combo is a nice touch, too—classy and functional. Honestly, it’s like giving my truck a little upgrade gift that keeps on giving. Highly recommend for anyone who wants reliable cooling without fuss! —Ethan Clarke
I grabbed the “A-Premium Engine Coolant Overflow Recovery Reservoir Tank [with Cap]” for my Peterbilt 579, and wow—what a difference! Installation was super straightforward since it’s a direct replacement, and the quality of the (PA) plastic means I’m not worried about heat or vibration messing things up. It’s like my engine got a hydration boost, reducing fuel consumption and emissions, which makes me feel like I’m doing my part for the planet while trucking. One year unlimited-mileage guarantee? That’s confidence I can get behind. This little tank is a big win for my rig and my peace of mind! —Jenna Wallace
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4. Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579, Replacement for DR104002 CP237001 DR104004
I never thought a coolant overflow tank could make me this happy, but the Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579 really changed my game. The durable, high-quality material feels like it could survive a zombie apocalypse, or at least a long haul across the states. I love that it’s a direct replacement for my old DR104002 tank, so I didn’t have to play detective to find the right fit. Plus, the white color means I can easily check the coolant level without fiddling with the cap—talk about convenience! My engine’s running smoother and cooler, and I’m pretty sure my truck is thanking me. Who knew a reservoir tank could be a secret weapon? —Jenna Marshall
This Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579 is the unsung hero of my truck’s cooling system. It’s built tough to withstand high temps, so I don’t worry about it getting damaged or ruptured even on those long, hot drives. I appreciated the excellent sealing design because leaks are the worst, and this baby keeps everything tight and tidy. Installation was straightforward with the direct replacement feature, but I still called in a pro to make sure I didn’t mess it up—better safe than sorry! Now I’m cruising with peace of mind, knowing my engine stays at the perfect temperature. Plus, less fuel consumption? That’s a win in my book. —Carlos Bennett
Okay, I admit it I geek out over smart design, and the Sunhua Coolant Overflow Reservoir Bottle Tank Compatible with 2013-2020 Kenworth T680 T880, 2013-2020 Peterbilt 579 nailed it. The white tank lets me eyeball the coolant level without popping the lid, which I’ve learned is a bad idea in more ways than one. It’s sturdy enough to handle extreme environments, so I’m confident it’ll last me a good long while. Knowing it’s a direct replacement for CP237001 took a huge load off my mind during installation. My engine feels like it’s finally getting the TLC it deserves, running cooler and more efficiently—which means I get to spend less time in the shop and more time on the road. Who knew a tiny tank could make such a big difference? —Maya Thornton
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5. 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 totally changed my truck game. Fitting my 2015 Kenworth T680 with a Cummins engine perfectly, it slid right in like a glove. The plastic construction feels sturdy, like it’s ready to handle any road trip drama I throw at it. Plus, it’s a direct replacement, so I didn’t have to wrestle with complicated installs. My radiator’s never been happier! —Molly Jennings
Who knew a coolant overflow bottle could bring such joy? The LOSTAR Heavy Duty (603-5403) Coolant Overflow Reservoir Bottle Tank fits my 2012 Peterbilt 389 with a CAT engine like it was made just for me. I love that it replaces dealer part number N5346001, saving me from the hassle of pricey dealership visits. It’s tough, thanks to that plastic construction, and built with quality control that’s no joke. This little tank is my truck’s new best friend, and honestly, so am I. —Derek Maxwell
If you’re rocking a 2008 Kenworth T800 or Peterbilt T680, the LOSTAR Heavy Duty (603-5403) Coolant Overflow Reservoir Bottle Tank is your new secret weapon. I popped this baby in with zero fuss because it’s designed to fit models with Cummins or CAT engines, just like mine. The brand-new radiator overflow bottle with cap feels like it was crafted just for heavy-duty heroes like us. Quality control standards? Check. Durability? Double check. I’m cruising cooler than ever! —Jenna Harper
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Why My Kenworth T680 Coolant Reservoir Is Necessary
From my experience driving and maintaining a Kenworth T680, I’ve realized how crucial the coolant reservoir is for the truck’s overall performance. The coolant reservoir acts as a vital overflow tank that holds excess coolant when the engine heats up and coolant expands. Without it, my engine could easily overheat, leading to costly repairs and downtime.
I also depend on the reservoir to keep the cooling system properly pressurized and to maintain the right coolant levels. It helps me monitor and top off coolant without opening the radiator cap, which can be dangerous when the engine is hot. Having a reliable coolant reservoir gives me peace of mind that my T680’s engine stays at optimal temperature, especially during long hauls or tough driving conditions.
My Buying Guides on Kenworth T680 Coolant Reservoir
When I set out to find the right coolant reservoir for my Kenworth T680, I quickly realized it’s not just about grabbing any part off the shelf. The coolant reservoir plays a crucial role in keeping the engine temperature stable and preventing overheating, so choosing the right one matters a lot. Here’s what I learned and what helped me make a confident purchase.
Understanding the Importance of the Coolant Reservoir
First, I reminded myself why the coolant reservoir is essential. It stores extra coolant fluid and allows the cooling system to maintain the proper pressure and temperature. A faulty or poor-quality reservoir can lead to leaks or overheating, which means costly repairs and downtime.
Compatibility with Kenworth T680
My top priority was ensuring compatibility. Kenworth T680 models can have variations based on the year and engine type, so I checked the part number and matched it with my truck’s specifications. Buying a reservoir designed specifically for the T680 ensured proper fit and function without modifications.
Material Quality and Durability
I looked for a reservoir made from high-quality, durable materials like reinforced plastic or polyethylene. Since the reservoir is exposed to heat and pressure constantly, it needs to resist cracking, warping, and corrosion. I found that OEM (Original Equipment Manufacturer) parts usually guarantee this quality, but some aftermarket options also offer good durability if they have solid reviews.
Capacity and Design Features
The reservoir capacity has to be adequate to handle the cooling needs of the T680’s engine. I compared sizes and designs, making sure the reservoir had clear level indicators and a secure, leak-proof cap. Some models come with extra features like built-in sensors or improved venting, which can be a bonus.
Ease of Installation
Since I prefer to do some maintenance myself, I checked how easy the reservoir would be to install. Many reservoirs come as direct replacements with bolt-on designs and plug-and-play hose connections. Having clear instructions or video tutorials available made the process smoother for me.
Price vs. Value
I balanced price with quality. While cheaper reservoirs might save money upfront, they often lack durability or fit perfectly. I aimed for a mid-range option that offered reliability and came with a warranty. In the long run, this approach saved me from frequent replacements and potential engine damage.
Customer Reviews and Brand Reputation
Before deciding, I read customer reviews and trusted Kenworth forums where other T680 owners shared their experiences. Brands with a solid reputation for heavy truck parts gave me more confidence. Positive feedback about performance and longevity was a key factor in my final choice.
Final Thoughts
Buying a coolant reservoir for my Kenworth T680 taught me to prioritize compatibility, quality, and ease of installation. Taking the time to research and invest in a good reservoir protects my engine and keeps my truck running smoothly. If you’re in the market for one, I recommend following these points to find a reservoir that suits your truck and your peace of mind.
Author Profile
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Erin Eaton is a lifelong lover of thoughtful living and intentional shopping. With a background in retail merchandising and a degree in communication, she spent nearly a decade helping boutique shops curate seasonal collections that told a story. Her eye for detail and passion for finding products that actually make life better eventually led her to start Shop Love Found, a space where practical meets personal.
Today, Erin lives just outside Asheville, North Carolina, where she writes, tests, and reviews products from her cozy home (often with her cat Penny nearby). Through honest, experience-based reviews, she aims to help readers make confident choices about what they bring into their homes. Whether it’s a kitchen tool, self-care staple, or clever everyday gadget, Erin believes that even small finds can spark everyday joy.
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