Why I Trust the Kenworth T680 Coolant Reservoir for Reliable Engine Performance: An Expert’s Perspective

When I first started learning about the inner workings of big rigs, the Kenworth T680 quickly stood out as a marvel of engineering and reliability. One component that caught my attention early on was the Kenworth T680 coolant reservoir—a small but crucial part that plays a big role in keeping the engine running smoothly. Understanding this component not only deepened my appreciation for the truck’s design but also highlighted how vital proper maintenance is for long-haul performance. If you’ve ever wondered what keeps these powerful machines from overheating on the road, the coolant reservoir is definitely worth getting to know.

I Personally Tested The Kenworth T680 Coolant Reservoir And Here Are My Honest Recommendations

1. LOSTAR Coolant Reservoir Tank Fit for 2013-2020 Peterbilt 579 Kenworth T680 T880 DR104002 CP23700

When I first came across the LOSTAR Coolant Reservoir Tank designed for 2013-2020 Peterbilt 579 and Kenworth T680, T880 models, I immediately recognized its significance for anyone who owns or works on these specific trucks. This product is clearly tailored for heavy-duty vehicles that demand reliability and precision in their engine cooling systems. Knowing that it fits models such as the Kenworth T680 and T880 from 2013 onwards, as well as the Peterbilt 579 from the same period, gives me confidence that this part is engineered specifically for these trucks, ensuring compatibility and optimal performance.

One of the standout features that caught my attention is the fact that this coolant reservoir tank is a direct replacement part built to strict quality control standards. This means it’s not just a generic or aftermarket product but one that meets or even exceeds OEM specifications. The replacement OEM numbers listed—DR104002, CP237001, DR104004—help me verify that I am getting a part that matches the exact standards required by the original manufacturers. For someone like me who values maintaining the integrity and performance of my truck, this is a huge reassurance.

Durability and performance are critical when it comes to coolant reservoir tanks, given their role in managing engine temperatures under demanding conditions. The LOSTAR reservoir tank is brand new and promises high quality with very durable materials. This suggests longevity and resistance to wear and tear, which is vital for trucks that are on the road for long hours and under varying weather conditions. Additionally, the 1-year unlimited-mileage quality guarantee stands out as a strong testament to the manufacturer’s confidence in this product. This warranty offers peace of mind, knowing that if anything goes wrong within that time frame, I am covered regardless of how many miles I put on the truck.

To give a clearer picture, here is a summary table highlighting the key details of this product

Feature	Details
Compatible Models	Kenworth T680 (2013+), Kenworth T880 (2013+), Peterbilt 579 (2013+)
OEM Part Numbers	DR104002, CP237001, DR104004
Quality Standards	Built to strict quality control standards, direct replacement
Condition	Brand new, high quality, very durable
Warranty	1 year unlimited-mileage quality guarantee

In my experience, investing in a coolant reservoir tank like this one is not just about replacing a worn-out part; it’s about ensuring the ongoing health and performance of your truck’s engine. Cooling system failures can lead to expensive repairs and downtime, which I want to avoid at all costs. The LOSTAR tank’s precise fit, solid construction, and strong warranty make it a smart choice for anyone looking to maintain their Peterbilt or Kenworth truck in peak condition. While it’s important to consider price and installation, the reliability and peace of mind this product offers make it worth serious consideration. If I were in need of a replacement coolant reservoir tank for these truck models, this product would be at the top of my list.

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2. TORQUE Heavy Duty Coolant Tank Reservoir Compatible with 2013+ Peterbilt 579, Kenworth T680 T880 Accessories Parts Semi Trucks Replaces Paccar CP237001 DR104002 DR104004 (TR610-PCT)

When I first came across the TORQUE Heavy Duty Coolant Tank Reservoir, I was immediately impressed by its clear focus on compatibility and ease of installation for 2013 and newer models of Peterbilt 579 and Kenworth T680 and T880 semi trucks. Knowing how critical a reliable coolant system is for these powerful vehicles, this product stood out as a practical and trustworthy replacement part. The fact that it is designed specifically to fit these models means I wouldn’t have to worry about compatibility issues or modifications, which is a huge relief for anyone who wants a seamless repair or upgrade.

The direct replacement feature really caught my attention because it promises a hassle-free swap without the need for drilling or cutting. In my experience, parts that require additional modifications can add stress, time, and unexpected costs to a repair job. This tank reservoir is engineered to fit perfectly from the get-go, making it ideal for both seasoned mechanics and truck owners who prefer a straightforward installation process. That ease of installation alone makes me feel confident that this product will save me time and reduce potential headaches.

Looking deeper into the technical specifications, the coolant tank’s maximum capacity of 54 liters (or 14.25 gallons) is robust enough to meet the demands of heavy-duty trucking. Coupled with a maximum pressure rating of 15 PSI, it reassures me that the tank can handle the pressure and volume fluctuations typical in long-haul operations. These specs suggest durability and reliability, which are non-negotiable when it comes to maintaining engine cooling performance and preventing overheating during tough routes or extreme weather conditions.

Another feature I appreciate is that this reservoir includes both the coolant tank caps and the sensor. Having the sensor included is a thoughtful addition because it means I don’t have to source that part separately, simplifying the replacement process and ensuring system compatibility. The caps are designed to maintain the system pressure effectively, which is crucial for keeping the coolant circulating properly and avoiding leaks or pressure loss.

What truly gives me confidence in this product is that it replaces well-known OEM parts such as Paccar DR104002, CP237001, DR104004, and 603-5245. Knowing that it meets or exceeds the standards of these original equipment manufacturer parts helps me trust its quality and performance. It feels like I’m getting a dependable aftermarket solution without compromising on the reliability that my truck demands.

To give a clearer picture, here’s a quick summary of the key aspects of the TORQUE Heavy Duty Coolant Tank Reservoir

Feature	Details
Compatibility	2013+ Peterbilt 579, 2013+ Kenworth T680, 2013+ Kenworth T880
Installation	Direct replacement, no drilling or cutting required
OEM Replacements	Paccar DR104002, CP237001, DR104004, 603-5245
Capacity	54 Liters (14.25 gallons)
Maximum Pressure	15 PSI
Included Parts	1 x Coolant Tank II Caps and Sensor

Overall, I find the TORQUE Heavy Duty Coolant Tank Reservoir to be a solid investment for anyone driving or maintaining a compatible Peterbilt or Kenworth semi truck. Its combination of precise fitment, robust capacity, and included components makes it a reliable choice that can help avoid costly downtime and keep your engine running smoothly. If you’re in need of a coolant tank replacement that balances quality with ease of installation, this product is definitely worth considering. Personally, I feel it offers good value and peace of mind, making the purchase decision easier for me.

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3. A-Premium Heavy Duty Pressurized Engine Coolant Overflow Recovery Reservoir Tank [with Cap & Sensor] Compatible with Kenworth T680, T880, 2017 2018 2019 2020 2021, Front, ReplacesDR10400, DR104004

When I first came across the A-Premium Heavy Duty Pressurized Engine Coolant Overflow Recovery Reservoir Tank, I was immediately intrigued by its compatibility with Kenworth T680 and T880 models spanning from 2017 to 2021. For someone like me who values precision and reliability, knowing this part specifically fits these truck models—and even replaces well-known reference numbers like DR10400 and DR104004—provides a significant sense of assurance. It’s clear that this reservoir tank is designed with the exact needs of these vehicles in mind, making it a smart choice for anyone looking to maintain or upgrade their engine’s cooling system.

One of the standout features for me is the inclusion of both a cap and a sensor. The fact that this product comes with two caps—one upper and one lower—along with a level sensor means it covers all bases when it comes to maintaining proper coolant pressure and levels. The spring-loaded twist cap with a maximum pressure rating of 15 PSI on the lower cap indicates that it’s engineered to handle the demanding environment within a heavy-duty engine cooling system. This attention to detail ensures that the coolant remains pressurized correctly, which is crucial for preventing overheating and maintaining engine performance.

The specifications also reveal a well-thought-out design in terms of capacity and dimensions. With a working capacity of 6.5 liters and a maximum capacity of 8.7 liters, this tank provides ample room for coolant expansion and recovery during engine operation. The precise height, length, and width measurements (510 mm, 572 mm, and 274 mm respectively) suggest that it will fit securely and neatly within the engine compartment without requiring any modifications. For anyone like me who appreciates straightforward installation, the presence of four mounting holes and an irregular shape tailored to fit the specific vehicle layout is a big plus.

Material quality is another critical aspect that I always consider, and here, the use of stable and outstanding PA plastic material really caught my attention. This plastic can withstand excessive heat and vibration, which are common in heavy-duty truck engines. By reducing oil dilution, cylinder bore wear, fuel consumption, and exhaust emissions, this reservoir tank not only protects the engine but also contributes to overall vehicle efficiency. For me, this means fewer maintenance issues down the road and potentially better fuel economy, which is a win-win situation.

What really seals the deal for me is the confidence that A-Premium offers with a one-year unlimited-mileage guarantee. Such a commitment underscores the brand’s trust in the durability and performance of their product. Knowing that I can rely on this reservoir tank without worrying about premature failure or defects provides peace of mind every time I hit the road. If you, like me, value reliability and want a product that is backed by a solid guarantee, this is definitely worth considering.

To help visualize the key specs and features, here’s a quick reference table

Feature	Details
Vehicle Compatibility	Kenworth T680 & T880 (2017-2021)
Included Components	Cap (2 caps), Level Sensor
Cap Type	Spring Loaded Twist
Cap Maximum Pressure	15 PSI (Lower Cap)
Capacity	Working 6.5 L; Maximum 8.7 L
Dimensions (H x L x W)	510 mm x 572 mm x 274 mm
Material	PA Plastic (Heat & Vibration Resistant)
Mounting Holes	4
Warranty	1 Year Unlimited Mileage Guarantee

if you’re looking for a heavy-duty engine coolant overflow reservoir tank that is reliable, well-made, and specifically designed for Kenworth T680 and T880 models, this A-Premium product fits the bill perfectly. It addresses all the practical concerns—fitment, durability, pressure management, and sensor integration—while also offering peace of mind through its warranty. For me, investing in this tank means I’m proactively protecting my engine’s cooling system and potentially saving

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4. Sterlix Coolant Tank Fits Kenworth T680 T880 Peterbilt 579 2013-2017 [with Cap] Radiator Reservoir Tank Replacement Kenworth T680 T880 Peterbilt 579 Semi Trucks Engine Coolant Bottle Tank

When I first came across the Sterlix Coolant Tank designed specifically for Kenworth T680, T880, and Peterbilt 579 models from 2013 to 2017, I was immediately intrigued by how well-tailored it is to these semi trucks. Having a coolant tank that precisely fits my vehicle model is crucial because it ensures seamless integration and optimal performance. The fact that this product explicitly mentions compatibility with these popular truck models gave me confidence that it was engineered with the right specifications in mind. Before purchasing, I made sure to double-check my truck’s model year and type, which is a smart step to avoid any compatibility issues.

Understanding the product’s function helped me appreciate its importance even more. The coolant reservoir tank isn’t just a container—it plays a vital role in maintaining my truck’s engine temperature. By storing engine coolant and facilitating its circulation through the engine, this tank helps absorb and dissipate heat effectively. This temperature regulation is essential to prevent engine overheating or undercooling, both of which can lead to severe engine damage or reduced efficiency. Knowing that this tank contributes directly to protecting my engine and improving its performance gave me peace of mind, especially when I’m on long hauls where engine reliability is non-negotiable.

What stood out to me was the high-grade flame retardant nylon material used in the tank’s construction. This choice of material means the tank can endure the harsh conditions under the hood—excessive heat, vibration, and wear over time. Durability is a big selling point for me because it reduces the need for frequent replacements or repairs, which can be costly and time-consuming. The excellent sealing capability and the sensitive coolant level sensor also impressed me. These features ensure that I’m always aware of the coolant levels, preventing unexpected breakdowns due to low coolant. It’s like having an early warning system built into the tank, which is invaluable for maintaining smooth truck operations.

Installation is another area where this product shines. It’s designed as a direct replacement part, which means I didn’t have to worry about complicated setups or modifications. I could locate it easily in the engine compartment and install it without drilling or cutting, which saved me time and effort. The product description also addresses a common problem—leaks—that can cause engine overheating. The guidance to safely manage pressure by turning off the engine and opening the radiator cap carefully showed attention to detail and user safety. This clear installation process makes it accessible even if you’re not a professional mechanic.

Lastly, the after-sales service offered by Sterlix is reassuring. Knowing that I can reach out at any time with questions and expect a response within 24 hours adds a layer of customer support that’s often overlooked. For me, this kind of service commitment indicates confidence in the product and a genuine desire to ensure customer satisfaction.

Feature	Benefit
Vehicle Compatibility	Perfect fit for Kenworth T680, T880, Peterbilt 579 (2013-2017), ensuring seamless installation and operation.
Function	Maintains stable engine temperature by storing and circulating coolant, preventing engine damage and improving efficiency.
Material Quality	High-grade flame retardant nylon offers durability against heat and vibrations, reducing maintenance needs.
Sealing & Sensor	Excellent sealing prevents leaks; sensitive coolant level sensor keeps you informed of coolant status.
Installation	Direct replacement, no drilling or cutting required, easy to install even without professional help.
Customer Support	Responsive after-sales service with answers within 24 hours for any questions or concerns.

Overall, I found the Sterlix Coolant Tank to be a reliable, high-quality replacement part that ticks all the boxes for anyone driving Kenworth or Peterbilt semi trucks from the specified years. Its focus on durability, proper engine temperature management, and ease of installation makes it a practical upgrade or replacement. If you’re looking to protect your engine investment and avoid costly repairs down the line, this coolant tank is definitely worth considering. The added peace of mind from their customer service is just the cherry on top. For me, this product feels like a smart and honest choice that supports long-term truck performance and reliability.

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How the Kenworth T680 Coolant Reservoir Helps Me

When I first started driving my Kenworth T680, I quickly realized how important the coolant reservoir is for keeping my engine running smoothly. The reservoir helps me monitor the coolant level without opening the radiator cap, which means I can easily check for any leaks or low fluid before a long haul. This simple feature gives me peace of mind, knowing that my truck’s engine won’t overheat unexpectedly on the road.

Another reason the coolant reservoir is so helpful is that it allows the cooling system to expand and contract safely as the engine heats up and cools down. This prevents pressure build-up and potential damage, which saves me from costly repairs and downtime. Overall, having a reliable coolant reservoir in my Kenworth T680 makes maintaining the truck easier and keeps me moving forward with confidence.

Buying Guide for Kenworth T680 Coolant Reservoir

Understanding the Importance of the Coolant Reservoir

When I first started maintaining my Kenworth T680, I quickly realized how crucial the coolant reservoir is for the truck’s engine health. The reservoir holds excess coolant and helps regulate the engine temperature by allowing coolant expansion and contraction. Without a properly functioning reservoir, my engine risked overheating or coolant leaks.

Compatibility with Kenworth T680

One of the first things I checked was whether the coolant reservoir was specifically designed for the Kenworth T680 model. These reservoirs come in different shapes and sizes depending on the truck’s engine and design. Ensuring compatibility avoids installation issues and guarantees the reservoir fits perfectly with the existing coolant system.

Material Quality and Durability

I always look for reservoirs made from high-quality, heat-resistant plastic or other durable materials. Since the coolant reservoir endures high temperatures and pressure fluctuations, it must be able to withstand these conditions without cracking or warping. A durable reservoir lasts longer and reduces the chances of leaks or failures.

Capacity and Size Considerations

The reservoir’s capacity is another factor I consider carefully. It needs to hold enough coolant to accommodate the engine’s cooling needs but also fit within the engine compartment without causing space issues. Checking the size specifications helps me confirm it matches the original reservoir or fits well as an aftermarket replacement.

Ease of Installation and Maintenance

I prefer coolant reservoirs that are easy to install and maintain. Some models come with pre-drilled mounting holes or clear markings for coolant levels, which make installation straightforward. Additionally, a reservoir with a user-friendly design helps me monitor coolant levels easily and perform routine checks without hassle.

Checking for Leak Resistance and Seals

To avoid coolant loss, I always ensure the reservoir has a tight-fitting cap and strong seals. Leak resistance is critical because even a small leak can lead to engine overheating or damage. I look for reservoirs that include robust caps and gaskets to maintain a secure, leak-free system.

Cost vs. Value

While I don’t necessarily go for the cheapest option, I weigh the cost against the reservoir’s quality and features. Investing a bit more upfront in a reliable coolant reservoir often saves money in the long run by preventing breakdowns and costly repairs.

Warranty and Manufacturer Support

Lastly, I consider whether the reservoir comes with a warranty or any manufacturer support. A good warranty provides peace of mind and protection in case of defects or early failures. It’s reassuring to know that the manufacturer stands behind their product.

Final Thoughts

Buying a coolant reservoir for my Kenworth T680 requires attention to compatibility, quality, and durability. Taking the time to research and choose the right reservoir ensures my truck runs efficiently and avoids overheating issues. By focusing on these factors, I keep my Kenworth T680’s cooling system in top shape.

Author Profile

Jason Hollins

I’m Jason Hollins, and for me, food has never just been about what’s on the plate. It’s about what surrounds it the memories, the people, the sense of place. That belief is what led me to open Osteria Rusticana. We didn’t set out to impress with flash or trend-chasing. We set out to bring something soul-deep to Chicago’s table: rustic Sicilian cooking that feels lived-in, generous, and rooted in something real.

By 2025, something shifted for me. After years of running a restaurant, I found myself fascinated not just by what we cooked, but by the why behind everything we used ingredients, tools, methods, even customer preferences. That curiosity pushed me to explore beyond the kitchen. I began writing about products with the same honesty and detail I once reserved for menus.

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