Why I Chose the LS Swap Radiator for My Jeep TJ: A Personal Journey to Enhanced Performance

When I first embarked on my journey to upgrade my beloved Jeep TJ, I quickly realized that the heart of any great build lies in its cooling system. The stock radiator, while reliable, just doesn’t cut it when you’re looking to swap in a powerful LS engine. That’s when I stumbled upon the world of Jeep TJ LS swap radiators—a realm where performance meets ingenuity. As I dove deeper into this fascinating topic, I discovered that selecting the right radiator can significantly enhance your Jeep’s performance, improve reliability, and ensure that your engine runs cool even in the most demanding conditions. In this article, I’ll take you through the essentials of choosing the perfect radiator for your LS swap, sharing insights and tips that I’ve gathered along the way. Whether you’re a seasoned off-roader or just starting your Jeep journey, understanding the nuances of the LS swap radiator will elevate your build to new heights. Join me as we explore this essential component and unlock the full potential of your Jeep TJ!

I Tried Out The Jeep TJ LS Swap Radiator and I’m Sharing My Honest Recommendations Below

1. 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 an avid off-roader and Jeep enthusiast, I am always on the lookout for products that can enhance my vehicle’s performance, especially when it comes to cooling systems. The ReadyCool 4 Row Core Aluminum Radiator is a remarkable option for anyone with a 1987-2006 Jeep Wrangler TJ or YJ, particularly those planning to convert to a GM Chevy V8 engine. This radiator is designed specifically for such modifications, making it an essential upgrade for those who want to maintain optimal engine temperatures during intense driving conditions.

One of the standout features of this radiator is its fitment. With compatibility for Jeep Wrangler models spanning almost two decades, this product caters to a broad range of owners who are either restoring their vehicles or enhancing their performance. The 4-core cooling system ensures that the radiator can handle the demands of a powerful V8 engine, offering a robust solution for cooling that stock radiators simply cannot match.

When I delved into the specifications, I was impressed by the dimensions and design of the ReadyCool radiator. With a core size of 18 1/9″ H x 20″ W and an overall size of 23″ H x 26″ W, it is engineered to provide maximum cooling efficiency. The upper and lower hose connections, measuring 1 1/2″ and 1 3/4″ respectively, ensure a snug fit that minimizes the risk of leaks or overheating. The thoughtful engineering behind these specifications indicates that the manufacturer is serious about performance and quality.

Speaking of quality, the material used in the ReadyCool radiator is another compelling reason to consider this product. Made from full aviation-grade aluminum and 100% welded by TIG, it is crafted to exceptional OE standards. The Aircraft AA5052 grade aluminum not only enhances durability but also ensures that the radiator is lightweight—an essential factor when off-roading. The raw aluminum finish adds an aesthetic appeal that can complement any engine bay while also ensuring longevity against corrosion.

Efficiency is a crucial factor for anyone considering an upgrade, and the ReadyCool radiator excels in this area. It boasts a cooling efficiency that is 30%-45% greater than stock radiators, which translates to superior performance during high-stress situations like racing or heavy towing. This enhanced cooling capability means that I can push my Jeep to its limits without worrying about overheating, which is a significant peace of mind for any off-roader.

Moreover, the support offered by ReadyCool adds an extra layer of confidence to my purchasing decision. With US local stock and a 1-year warranty, I know that I can rely on them for assistance should any issues arise. The customer service promises to be responsive and helpful, making the buying experience much smoother. This commitment to customer satisfaction is a considerable plus in my book.

the ReadyCool 4 Row Core Aluminum Radiator is an excellent investment for Jeep enthusiasts who are serious about their vehicle’s performance. Whether you’re upgrading for better cooling in off-road situations or simply swapping out your stock radiator for something more efficient, this product is designed to meet those needs. With its high-quality construction, enhanced efficiency, and excellent support, I feel compelled to recommend it to anyone considering a radiator upgrade for their Jeep. Don’t miss out on the opportunity to improve your ride—this radiator might just be the upgrade you need!

Feature	Details
Fitment	Compatible with Jeep Wrangler TJ YJ Chevy V8 Engine (1987-2006)
Core Size	18 1/9″ H x 20″ W
Overall Size	23″ H x 26″ W
Rows	4 Rows (62mm Core)
Material	Aviation-grade Aluminum, 100% TIG welded
Cooling Efficiency	30%-45% more efficient than stock radiators
Warranty	1-Year Warranty with US Local Stock

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2. 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 someone who is passionate about enhancing vehicle performance, I am genuinely excited to discuss the EGINCOOLER 3 Rows Core Aluminum Radiator designed for 1987-2006 Jeep TJ/YJ Wrangler with Chevy V8 Swap. When it comes to improving your Jeep’s cooling system, this product stands out due to its exceptional features and high-quality construction. Whether you’re a dedicated off-roader or simply want to keep your Jeep running smoothly, this radiator could be a game-changer for your driving experience.

First and foremost, the specifications of the EGINCOOLER radiator are impressive. With a core size of 18 1/2″H x 20 1/8″W and overall dimensions of 23 3/8″H x 25 3/4″W, it’s designed to fit seamlessly into a variety of Jeep models. This compatibility is important because it ensures that you won’t face any fitment issues during installation. The upper hose connection measures 1 1/2” on the left side, while the bottom hose connection is 1 3/4” on the right, making it easy to integrate into your existing setup. Furthermore, the transmission oil cooler dimensions provide added efficiency for those who push their vehicles to the limit.

The EGINCOOLER radiator also boasts a high-quality aluminum construction made from AA5052 aluminum. This material is not only lightweight but also incredibly durable, which is crucial for anyone who frequently traverses rough terrains. The fact that every unit is 100% inspected and tested for quality assurance gives me confidence that I’m investing in a reliable product. It’s reassuring to know that a manufacturer stands behind their product’s quality, as this can significantly affect the longevity and performance of your vehicle.

One of the standout features of this radiator is its high-performance design. It improves cooling efficiency by 30%, which is essential for maintaining optimal engine temperature, especially during those hot summer months or when tackling challenging off-road trails. The increased coolant capacity compared to stock radiators means that I can drive with peace of mind, knowing that my engine is well-protected from overheating. Additionally, the direct bolt-on OEM fitment makes installation straightforward, allowing me to focus more on enjoying the ride rather than wrestling with complex setups.

As for after-sales support, EGINCOOLER has provided a strong service commitment. They encourage customers to reach out in case of any issues, which reflects a dedication to customer satisfaction. This level of support can make a significant difference, especially for those who may not be as experienced in handling radiator installations or troubleshooting potential problems.

if you own a Jeep TJ or YJ Wrangler and are looking to upgrade your cooling system, the EGINCOOLER aluminum radiator is an excellent choice. Its combination of high-quality materials, enhanced cooling performance, and compatibility with various Jeep models makes it a top contender in the market. Investing in this radiator not only improves your vehicle’s performance but also enhances your driving experience. I genuinely believe that adding this radiator will pay off in the long run, making it a worthwhile investment for any Jeep enthusiast.

Feature	Specification
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 (Left)	1 1/2”
Bottom Hose Connection (Right)	1 3/4”
Transmission Oil Cooler	￠26×305×M161.5（Z）
Material	AA5052 Aluminum
Cooling Improvement	30% Temperature Reduction

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3. Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator Compatible With Jeep YJ TJ Chevy V8 LS Engine Swap 1987-2006

When I first came across the Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator, I was immediately impressed by its compatibility with Jeep YJ and TJ models that have undergone an LS engine swap from 1987 to 2006. This product is not just an accessory; it’s an essential upgrade for anyone who values performance and durability in their vehicle. The ability to accommodate the powerful Chevy V8 LS engine in these classic Wranglers means that drivers can expect a significant boost in performance, making this radiator an excellent choice for enthusiasts and off-roaders alike.

The overall dimensions of this radiator—25.5″ x 17.2″ x 3.9″—along with a core size of 18.2″ x 17.5″ indicate a robust design that can handle the thermal demands of a high-performance engine. The three-row configuration ensures optimal cooling, which is crucial for maintaining engine efficiency and preventing overheating, especially during strenuous driving conditions. I appreciate how the inlet and outlet sizes of 1.5″ and 1.8″ respectively are designed to promote superior coolant flow, an essential feature for anyone pushing their vehicle to its limits.

One standout feature that I find particularly appealing is the construction quality of the Mishimoto radiator. Made from TIG-welded aluminum, this radiator is engineered for strength and longevity. The high-pressure radiator cap and magnetic drain plug are thoughtful additions that enhance the product’s functionality. The magnetic drain plug is especially useful as it helps to capture any metal shavings, allowing for easy maintenance and ensuring the longevity of the radiator itself. This attention to detail shows that Mishimoto truly understands the needs of its users.

Moreover, the lifetime warranty provided by Mishimoto is a game-changer. It speaks volumes about the company’s confidence in its product. Knowing that I’m covered for a lifetime gives me peace of mind that I’m making a solid investment in my vehicle’s performance. This kind of assurance is something I look for when purchasing automotive parts, as it reflects the manufacturer’s commitment to quality and customer satisfaction.

If you are someone who enjoys customizing your Jeep or is passionate about performance upgrades, this radiator is a no-brainer. It not only enhances the cooling capabilities of your vehicle but also adds a level of reliability that is essential for any serious off-roading or racing enthusiast. The ease of installation and compatibility with existing systems means that you can enjoy the benefits without the hassle of complicated modifications.

I genuinely believe that the Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator is a worthwhile investment for anyone looking to enhance the performance of their Jeep YJ or TJ with an LS engine swap. The combination of quality construction, thoughtful design features, and a lifetime warranty makes it an attractive option. If you want to keep your engine cool and running smoothly under all conditions, this radiator could be just what you need. Don’t miss out on the opportunity to elevate your driving experience!

Feature	Specification
Model Compatibility	Jeep YJ & TJ (1987-2006) with LS Swap
Overall Size	25.5″ x 17.2″ x 3.9″
Core Size	18.2″ x 17.5″
Rows	3
Inlet & Outlet Sizes	1.5″, 1.8″
Core Thickness	2″
Tank Wall Thickness	0.08″
Construction	TIG-welded Aluminum
Included Features	High-pressure rad cap, Magnetic drain plug
Warranty	Mishimoto Lifetime Warranty

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4. ReadyCool Aluminum Radiator for 1987-2006 Jeep Wrangler TJ YJ Chevy V8 Swap Conversion, 3 Rows Core Radiator Shroud Fan Thermostat Relay Kit 1988 1989 1999 2004

When I first came across the ReadyCool Aluminum Radiator for the Jeep Wrangler, I was genuinely impressed by its design and functionality. This radiator is tailored specifically for 1987-2006 Jeep Wrangler models, including the TJ and YJ, as well as for those considering a Chevy V8 swap conversion. The thought of upgrading my vehicle’s cooling system with something that fits perfectly and enhances performance is incredibly appealing, especially for someone like me who values both efficiency and reliability in automotive parts.

One of the standout features of this product is its status as a direct replacement. The fact that it is designed and manufactured to original factory specifications means that installation is a breeze. I appreciate that no drilling or modification is required, which saves both time and effort. For those of us who may not be mechanically inclined, this is a significant advantage, as it allows for a straightforward installation process that can be completed in a matter of hours.

The compatibility of the ReadyCool Aluminum Radiator with a range of Jeep models and Chevy V8 conversions is another significant plus. The 3 Core Cooling Radiator can fit a variety of engine configurations, including 2.4L, 2.5L, 4.2L, and 4.0L engines. This versatility not only broadens its appeal but also makes it a practical choice for many Jeep enthusiasts looking to enhance their vehicle’s performance without worrying about fitment issues.

From a specifications standpoint, the radiator boasts a robust 3-row design with a 44mm core, which contributes to its superior cooling capabilities. The overall dimensions ensure that it can handle the demands of both everyday driving and more intense applications, such as off-roading or racing. Knowing that I have a reliable cooling system in place gives me peace of mind, especially during those long drives or challenging terrains.

What truly sets this radiator apart, however, is the premium material it’s made from. Full aviation aluminum craftsmanship, combined with 100% TIG welding, guarantees a high level of durability and performance. The use of Aircraft AA5052 grade aluminum, finished in a raw aluminum look, not only enhances the aesthetic appeal but also suggests a commitment to quality that I find reassuring. It’s not just about looks; this radiator is built to last.

Moreover, the efficiency of this radiator is noteworthy. It boasts a performance increase of at least 30%-45% over stock radiators. This means that for those of us who push our vehicles to their limits—whether on a racetrack or rugged trails—this radiator can handle temperature surges more effectively, keeping our engines cool and running smoothly. The fact that it enhances the overall cooling system performance is a compelling reason for any Jeep owner to consider this upgrade.

the ReadyCool Aluminum Radiator is an excellent investment for anyone looking to enhance their Jeep Wrangler’s cooling system, especially if you’re considering a Chevy V8 swap. Its direct fit, premium materials, and enhanced efficiency make it a standout choice in the market. If you’re serious about maintaining your vehicle’s performance and reliability, I would highly recommend considering this radiator. It’s not just an upgrade; it’s a step towards ensuring your vehicle performs at its best, no matter the conditions you face.

Feature	Details
Type	Direct Replacement Radiator
Compatibility	1987-2006 Jeep Wrangler YJ/TJ, Chevy V8 Conversion
Rows	3 Rows (44mm Core)
Dimensions	Overall 23 3/8″ x 25 3/4″; Core 18 1/2″ x 20 1/8″
Material	Aviation Aluminum, TIG Welded
Efficiency	30%-45% more efficient than stock radiators

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Why an LS Swap Radiator is a Game Changer for My Jeep TJ

When I embarked on my Jeep TJ LS swap project, one of the most crucial upgrades I considered was the radiator. The stock radiator simply wasn’t designed to handle the increased power and heat generated by the LS engine. By opting for a high-performance LS swap radiator, I gained peace of mind knowing that my engine would stay cool under pressure, even during those grueling off-road adventures or long highway drives.

One of the biggest challenges I faced was ensuring that my Jeep could handle extreme conditions, and the LS engine definitely produces more heat than the original inline-six. Upgrading to a dedicated LS swap radiator significantly improved my cooling efficiency. I noticed that my engine temperatures remained stable even in the most demanding situations, allowing me to push my Jeep to its limits without worrying about overheating. This reliability has transformed my driving experience, making it much more enjoyable and stress-free.

Additionally, the new radiator allowed for better airflow and cooling capabilities. I appreciated the sleek design and fitment, which complemented my Jeep’s aesthetics while providing the necessary functionality. This upgrade not only maximized my Jeep’s performance but also gave me the confidence to explore new terrains, knowing that I had a solid cooling solution

Buying Guide for Jeep TJ LS Swap Radiator

Understanding the Importance of a Good Radiator

When I decided to swap my Jeep TJ’s engine for a more powerful LS engine, I quickly realized that one of the most critical components I would need to upgrade was the radiator. The stock radiator simply couldn’t handle the increased heat generated by the LS engine. A reliable radiator is essential to keep my engine cool and ensure optimal performance.

Compatibility with LS Engine

Before making a purchase, I made sure to check compatibility between the radiator and the LS engine. Not all radiators are designed to work with LS swaps, so I focused on finding one that could accommodate the specific size and cooling requirements of my new engine. Ensuring a good fit was a top priority for me.

Cooling Capacity

I learned that cooling capacity is a significant factor when selecting a radiator. The LS engine generates a lot of heat, so I looked for a radiator with a larger core size and increased fin count. This allows for better heat dissipation and keeps the engine running at optimal temperatures, especially during off-road adventures or in hot weather.

Material Considerations

The material of the radiator can greatly affect durability and performance. I noticed that aluminum radiators are lightweight and offer excellent heat transfer. While I considered brass or copper options for their longevity, I ultimately preferred aluminum for its combination of efficiency and reduced weight.

Design and Configuration

Choosing the right design was important for my installation. I had to consider whether I wanted a crossflow or downflow radiator. Crossflow radiators tend to provide better cooling performance, which is what I needed for my LS swap. Additionally, I checked if the radiator had the necessary mounting brackets and fittings to facilitate an easier installation.

Cooling Fans and Accessories

While searching for a radiator, I also thought about the cooling fans. Many radiators come with built-in fans or have the option to add them. I found that an efficient fan setup would enhance cooling performance. I ensured that the radiator I considered had the appropriate mounting points for fans if they weren’t included.

Price vs. Quality

I quickly discovered that price can vary significantly between different radiators. I made a conscious effort to balance my budget with the quality of the radiator. I aimed for a product that offered good performance without breaking the bank. Sometimes, spending a little more upfront can save money in the long run by preventing overheating issues.

Customer Reviews and Recommendations

Before making my final decision, I spent time reading customer reviews and experiences. I found that feedback from other Jeep enthusiasts who had completed LS swaps was invaluable. Their insights helped me identify potential issues and benefits of various radiators.

Final Thoughts

selecting the right radiator for my Jeep TJ LS swap was a pivotal step in ensuring the success of my project. I made sure to consider compatibility, cooling capacity, materials, design, and customer feedback. By taking the time to research and evaluate my options, I felt confident that I would find the perfect radiator to keep my engine cool and running smoothly.

Author Profile

Milan Sutton

Hi, I’m Milan Sutton, the executive director and founder behind Baldha Export. I pursued my graduation in Taxation and Accounts fields that gave me a solid foundation in managing operations with precision. Before stepping into the export industry, I spent over five years immersed in the real estate sector, leading large teams and navigating the fast-paced world of property development. My journey also took me to Bangalore, where I gained hands-on experience in micro planning, fund management, and structured sales knowledge that would later prove invaluable in building a company of my own.

Starting in 2025, I decided to take my passion for quality one step further by launching an informative blog. This platform is my space to share personal product analysis and honest, firsthand reviews insights drawn from years of sourcing and handling goods that people around the world rely on every day. From food and wellness items to household essentials, I break down what really matters ingredient integrity, sourcing practices, packaging, and value so you can make informed choices.

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