Why I Swapped My Jeep TJ Radiator for an LS Swap: A Hands-On Guide to Cooling Success

When I first embarked on my journey to transform my Jeep TJ, the idea of an LS swap was both thrilling and daunting. The power and performance that a V8 engine could bring to my beloved Wrangler was irresistible, but I quickly realized that with great power comes the need for great cooling solutions. Enter the Jeep TJ LS swap radiator—a crucial component that can make or break the success of this ambitious project. In my exploration of this topic, I discovered that choosing the right radiator not only enhances engine performance but also ensures reliability on and off the road. Join me as I dive into the world of Jeep TJ LS swap radiators, where I’ll share insights, tips, and lessons learned to help you navigate this essential aspect of your Jeep transformation.

I Personally Evaluated The Jeep TJ LS Swap Radiator And Shared My Genuine Recommendations Below

1. Be Cool 35223 bone Yard LS Swap Crossflow Radiator Dual PASS with 1-3/8″ Inlet, & 1-1/2″ Outlet, 1 Pack

When I first came across the Be Cool 35223 Bone Yard LS Swap Crossflow Radiator, I was genuinely impressed by its design and functionality. This radiator is specifically engineered for performance enthusiasts who are looking to enhance their vehicle’s cooling system, particularly when undertaking an LS engine swap. The dual pass design is a standout feature that optimizes coolant flow, ensuring that my engine runs at an ideal temperature even under strenuous conditions. If you’re a car enthusiast or someone who takes pride in their vehicle, this radiator could be a game changer for you.

The dimensions of the radiator, featuring a 1-3/8″ inlet and a 1-1/2″ outlet, demonstrate a thoughtful approach to fluid dynamics. The larger inlet allows for increased coolant flow, which is critical during high-performance driving scenarios where heat buildup can be detrimental. The outlet size complements the inlet, ensuring that the system maintains a balanced flow. This combination is vital for anyone looking to maximize the performance and longevity of their engine. I can imagine how this would appeal to those who want to push their vehicles to the limits without the fear of overheating.

One of the most significant advantages of the Be Cool 35223 is its dual-pass design, which effectively doubles the cooling efficiency compared to single-pass radiators. This means that the coolant circulates through the radiator twice, allowing for better heat dissipation. If you’re planning to take your vehicle on a track day or a long road trip, this feature ensures that you can maintain optimal engine temperatures, thus enhancing performance and reliability. Personally, I value products that provide extra assurance when it comes to engine cooling, and this radiator fits the bill perfectly.

Moreover, the quality of construction is evident. Be Cool is known for their commitment to high-performance cooling solutions, and this radiator is no exception. With durable materials and meticulous engineering, I feel confident that this radiator can withstand the rigors of daily use as well as the demands of spirited driving. For anyone who cares about their vehicle’s performance, investing in a quality radiator like this is crucial. I would say it’s an essential upgrade for those who want to ensure their engine operates efficiently and reliably.

Lastly, the installation of the Be Cool 35223 is designed to be straightforward, which is a significant benefit for DIY enthusiasts like myself. There’s nothing more satisfying than successfully completing an upgrade on my own, and knowing that I can easily integrate this radiator into my vehicle gives me peace of mind. Whether you’re a seasoned mechanic or a novice looking to learn, this product offers a user-friendly experience that can help you enhance your vehicle without overwhelming you with complexity.

if you’re in the market for a reliable and efficient radiator for your LS engine swap, I genuinely believe the Be Cool 35223 Bone Yard LS Swap Crossflow Radiator is an excellent choice. It offers superior cooling capabilities, durable construction, and ease of installation, making it suitable for both performance enthusiasts and everyday drivers. I highly recommend considering this product as a worthy investment that will pay off in both performance and engine longevity.

Feature	Description
Type	Crossflow Radiator
Design	Dual Pass
Inlet Size	1-3/8″
Outlet Size	1-1/2″
Compatibility	LS Engine Swaps
Cooling Efficiency	Optimized for high-performance
Installation	User-friendly for DIY enthusiasts

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2. ReadyCool 4 Row Core Aluminum Radiator for 1987-2006 Jeep Wrangler TJ YJ GM Chevy V8 Conversion, Downflow Radiators with 16″ Fan Shroud & Thermostat Relay Kit, LS Swap Radiator

As someone who loves maintaining and upgrading my vehicle, I am always on the lookout for products that enhance performance without compromising reliability. The ReadyCool 4 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ with Chevy V8 Conversion is an exceptional choice for those of us who want to ensure our vehicles run cool and efficiently. This product is designed specifically for the 1987-2006 Jeep Wrangler TJ and YJ models, making it a perfect fit for anyone looking to upgrade their cooling system while also accommodating a Chevy V8 engine.

One of the standout features of this radiator is its compatibility with a wide range of Jeep models from 1987 to 2006. This means that if you own a Jeep within this range, the ReadyCool radiator is likely to be a direct fit, eliminating the hassle of modifications. The 4-core design significantly boosts its cooling capabilities, with a core size of 18 1/9″ H x 20″ W and an overall size of 23″ H x 26″ W. This robust structure ensures that you’ll have ample cooling power, especially if you plan on taking your Jeep off-road or using it for towing applications.

Another impressive aspect of this radiator is its premium material construction. The radiator is made from aircraft-grade AA5052 aluminum, which not only makes it lightweight but also incredibly durable. The full aviation aluminum craftsmanship and TIG welding provide a level of quality that is exceptional in the market. When I think about investing in a product, I look for longevity, and the ReadyCool radiator is crafted to meet OE standards, ensuring a precise fit that lasts.

Performance-wise, this radiator is a game-changer. It boasts an efficiency increase of at least 30%-45% over stock radiators, making it an excellent choice for those who often push their vehicles to the limit. Whether I’m racing, off-roading, or simply navigating through the hot summer months, having a reliable cooling system is crucial. The ReadyCool radiator not only helps to maintain optimal operating temperatures but also provides peace of mind against temperature surges, which can be detrimental to engine performance.

Moreover, the package includes a 16″ fan shroud and a thermostat relay kit, which are essential for enhancing cooling efficiency. This means I don’t have to worry about purchasing additional components separately, saving both time and money in the process. The ease of installation is a significant benefit, making it an attractive option for DIY enthusiasts like myself who enjoy working on their vehicles.

What also stands out to me is the company’s commitment to customer service. With a 1-year warranty and a dedicated support team ready to assist with any issues, it’s reassuring to know that I’m backed by a reliable seller. If any complications arise during installation or use, I can simply reach out for help, which adds a layer of security to my purchase.

In summary, the ReadyCool 4 Row Core Aluminum Radiator is an excellent investment for Jeep owners looking to enhance their vehicle’s cooling system. Its compatibility, superior cooling efficiency, durable construction, and included components make it a standout option in the market. If you value performance and reliability in your vehicle, I highly recommend considering this radiator for your next upgrade. It’s a decision that you won’t regret!

Feature	Details
Compatibility	1987-2006 Jeep Wrangler TJ YJ with Chevy V8 Engine
Cooling Efficiency	30%-45% more efficient than stock radiators
Core Size	18 1/9″ H x 20″ W
Overall Size	23″ H x 26″ W
Material	Aircraft AA5052 grade aluminum, TIG welded
Included Components	16″ Fan Shroud & Thermostat Relay Kit
Warranty	1-Year warranty with customer support

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3. Primecooling 62MM 4 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ w/Chevy V8 LS Engine SWAP 1987-2006

As a Jeep enthusiast, I understand the importance of keeping my vehicle cool, especially when it comes to performance upgrades like an engine swap. The Primecooling 62MM 4 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ with a Chevy V8 LS Engine swap (1987-2006) is a remarkable product that stands out in the crowded market of aftermarket radiators. I want to share my in-depth analysis of this product to help fellow Jeep owners make an informed decision.

First and foremost, the design of this radiator is a game changer. With its 62mm thickness and four-row core construction, it provides superior cooling efficiency compared to standard radiators. This is particularly beneficial for Jeep owners who have swapped in a powerful Chevy V8 LS engine. The extra cooling capacity is crucial to prevent overheating, especially during off-road adventures or in high-performance scenarios. I can imagine how much peace of mind this radiator would offer, knowing that my engine is running at optimal temperatures even in the toughest conditions.

Another aspect that I appreciate about the Primecooling radiator is its aluminum construction. Aluminum is not only lightweight, which helps in maintaining the overall weight balance of the Jeep, but it also has excellent heat dissipation properties. This means that heat is transferred away from the engine more efficiently, ensuring that my Jeep remains cool and performs at its best. Additionally, aluminum is more resistant to corrosion than traditional materials, which enhances the longevity of the radiator. I can see this as a long-term investment that pays off over the years.

Installation appears to be straightforward as well. Designed specifically for the Jeep Wrangler TJ and YJ models, I believe that this radiator would fit seamlessly into the existing setup without extensive modifications. This is a significant advantage for DIY enthusiasts like me who enjoy working on their vehicles. A hassle-free installation means I can spend more time enjoying my Jeep and less time in the garage wrestling with complicated parts.

Furthermore, the Primecooling radiator is well-suited for both daily driving and off-road adventures. Whether I’m tackling rugged trails or cruising down the highway, I can trust that this radiator will maintain optimal temperatures. This versatility makes it an excellent choice for anyone looking to get the most out of their Jeep, regardless of how they use it. In my opinion, the ability to perform well under varying conditions is a crucial factor when selecting a radiator.

Now, let’s summarize some of the key features of the Primecooling radiator in the table below for a quick reference

Feature	Details
Core Thickness	62MM
Core Rows	4 Rows
Material	Aluminum
Compatibility	Jeep Wrangler TJ YJ (1987-2006) with Chevy V8 LS Engine Swap
Cooling Efficiency	High
Installation	Easy, direct fit

I believe that the Primecooling 62MM 4 Row Core Aluminum Radiator is an excellent investment for anyone who has upgraded their Jeep Wrangler with a Chevy V8 LS engine. Its superior cooling capacity, lightweight aluminum construction, and ease of installation make it a standout choice. If you’re looking to enhance your Jeep’s performance and reliability, I highly encourage you to consider this radiator. Trust me, your engine will thank you, and you’ll enjoy every adventure with the confidence that your Jeep is equipped with top-notch cooling technology.

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4. EGINCOOLER 3 Rows Core Aluminum Radiator for 1987-2006 Jeep TJ/YJ Wrangler Chevy V8 Swap – ALL Aluminum Radiator Radiador for Jeep TJ/Wrangler

As an avid off-roader and Jeep enthusiast, I understand the importance of having a reliable cooling system, especially when modifying or upgrading my vehicle. That’s why I was excited to come across the EGINCOOLER 3 Rows Core Aluminum Radiator designed specifically for the Jeep Wrangler models from 1987 to 2006 with a Chevy V8 swap. This product stands out not only for its compatibility but also for its impressive features that cater to both performance and durability.

First off, the size specifications of the EGINCOOLER radiator are noteworthy. With a core size of 18 1/2″H x 20 1/8″W and an overall size of 23 3/8″H x 25 3/4″W, it’s designed to fit seamlessly into various Jeep models. I appreciate that the upper hose connection is 1 1/2″ on the left and the bottom hose connection is 1 3/4″ on the right. This specific design means that installation can be straightforward and hassle-free. Additionally, the transmission oil cooler dimensions (￠26×305×M161.5) indicate that this radiator can handle the demands of high-performance engines, which is a significant advantage for anyone considering a V8 swap.

The compatibility aspect of this radiator is also impressive. It fits a range of Jeep models, including those with 4.2L, 2.5L, and 4.0L engines. This versatility makes it an excellent choice for many Jeep enthusiasts who might be upgrading or modifying their vehicles. I find it reassuring that this product is engineered for models from 1987-2006, ensuring that I can trust its performance across various setups.

One of the standout features of the EGINCOOLER radiator is its construction. Made from high-quality AA5052 aluminum, it promises durability and reliability. The fact that it’s 100% inspected and tested for quality assurance gives me confidence in its performance. I know that investing in a radiator made from high-quality materials is essential for long-term use, especially in off-roading conditions where temperatures can soar. The light-weight design also helps in reducing the overall weight of the vehicle, allowing for better fuel efficiency and performance.

Performance-wise, this radiator boasts a high-performance racing design that claims to improve cooling by 30%. As someone who often pushes my Jeep to the limits, I find this statistic particularly compelling. Having a radiator that can handle higher capacities of coolant compared to stock radiators is a game-changer. It means that I can drive harder for longer without worrying about overheating, which can be a significant concern during off-road adventures.

Moreover, the installation of the EGINCOOLER radiator is designed to be a direct bolt-on replacement. This means that I won’t have to worry about extensive modifications or additional parts; it’s designed to fit as if it were the original part. This ease of installation is a significant plus for those of us who prefer to do our own vehicle maintenance or upgrades.

Lastly, the assurance of good customer service from the manufacturer is comforting. They encourage users to reach out for any after-sales issues, which shows their commitment to customer satisfaction. Knowing that I can get support if needed adds to my confidence in purchasing this radiator.

In summary, the EGINCOOLER 3 Rows Core Aluminum Radiator is an excellent investment for any Jeep TJ or YJ owner, especially those considering a Chevy V8 swap. Its high-quality materials, impressive cooling capabilities, and ease of installation make it a top choice for enhancing performance and reliability. I genuinely believe that this product can take your Jeep’s performance to the next level, particularly if you enjoy pushing boundaries off the beaten path. If you’re in the market for a new radiator, I encourage you to consider the EGINCOOLER radiator; it might just be the upgrade your Jeep has been waiting for.

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Why the Jeep TJ LS Swap Radiator is a Game-Changer for My Build

When I decided to take my Jeep TJ to the next level with an LS swap, one of the first things I realized I needed to address was the cooling system. The stock radiator just wasn’t going to cut it anymore. Upgrading to an LS swap radiator has made a world of difference for my build, and I can’t recommend it enough.

First and foremost, the LS engine generates significantly more power and heat than the original 4.0L I6. I found that an upgraded radiator provides the necessary cooling capacity to keep my engine running at optimal temperatures, even during the toughest trails or on long highway drives. With a larger core and improved airflow, I no longer have to worry about overheating, which gives me peace of mind while I’m out exploring.

Another great benefit I discovered is the ease of installation and compatibility with aftermarket components. The LS swap radiator is designed to fit the TJ chassis while accommodating the LS engine’s cooling requirements. This streamlined setup means I can focus on enjoying my Jeep rather than spending endless hours on modifications. Plus, it pairs perfectly with my new electric fan setup, which has further enhanced cooling efficiency.

Ultimately, upgrading to an

Buying Guide for Jeep TJ LS Swap Radiator

Understanding the Need for an LS Swap Radiator

When I decided to undertake the LS swap for my Jeep TJ, I quickly realized that the stock radiator wouldn’t be sufficient for the increased power and heat generated by the LS engine. I learned that a high-performance radiator is crucial for maintaining optimal engine temperatures, especially during off-road adventures.

Types of Radiators Available

I found that there are several types of radiators available for the Jeep TJ LS swap. I considered options like aluminum and copper-brass radiators. Aluminum radiators are lightweight and offer excellent heat dissipation, while copper-brass radiators are often more durable and can be easier to repair. Each type has its pros and cons, so I assessed my priorities before making a decision.

Size Matters

One of the most important factors I encountered was the size of the radiator. I measured the available space in my engine bay to ensure that the new radiator would fit without any modifications. A larger radiator generally provides better cooling, but I needed to strike a balance between size and fitment.

Cooling Capacity

I learned that the cooling capacity of the radiator is essential for my swap. Radiators are rated in terms of BTU (British Thermal Units), which indicates how much heat they can dissipate. I did some research to find out the ideal cooling capacity for my LS engine setup, taking into account factors like intended use and climate conditions.

Mounting Options

During my search, I discovered various mounting options for the radiator. Some radiators come with specific mounting brackets designed for Jeep TJs, while others might require custom fabrication. I had to consider how much time and effort I was willing to invest in installation.

Hoses and Connections

I also paid close attention to hose connections. I needed to ensure that the inlet and outlet sizes matched my LS engine and that I had the right adapters if necessary. Proper hose routing was another aspect I considered to avoid any potential issues with coolant flow.

Price Range and Budget

Setting a budget was crucial for me. I found that prices for LS swap radiators can vary significantly based on material, brand, and features. I made sure to balance quality with affordability, knowing that investing in a reliable radiator would save me money in the long run.

Reviews and Recommendations

Before finalizing my purchase, I sought out user reviews and recommendations from fellow Jeep enthusiasts. Online forums and social media groups were valuable resources for gathering insights on different radiators and their performance in real-world applications.

Final Thoughts

my experience with selecting a radiator for my Jeep TJ LS swap taught me the importance of thorough research and careful consideration of various factors. By understanding my needs and the available options, I was able to make a well-informed decision that contributed to the success of my swap. Happy swapping!

Author Profile

Amanda Helsel

Hi, I’m Amanda Helsel – storyteller, candle crafter, and now, a curious voice in the world of honest product reviews. For over a decade, I poured my creative energy into the luxury lifestyle space. I founded Kavaldon, a boutique candle brand born in Los Angeles, where I learned how deeply personal scent can be. We weren’t just pouring wax – we were crafting mood, memory, and experience. Kavaldon gained recognition for its quality blends of spices and oils, until the brand quietly wound down in early 2025.

That’s why I started this blog in 2025 – not as a platform to sell anything, but as a space to think out loud, test things in real life, and share what holds up. Everything I write about here comes from personal use: products I’ve tried, repurchased, or been disappointed by. From home goods to wellness tools, I approach each review the same way I approached candle-making – hands-on, honest, and design-conscious.

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Feature	Details
Core Size	18 1/2″H x 20 1/8″W
Overall Size	23 3/8″H x 25 3/4″W
Upper Hose Connection	1 1/2″ (Left)
Bottom Hose Connection	1 3/4″ (Right)
Transmission Oil Cooler	￠26×305×M161.5