I Tested the Best Jeep TJ LS Swap Radiator Options for a Reliable Cooling Upgrade
When I first started looking into a Jeep TJ LS swap, one of the biggest questions I ran into was cooling. A powerful engine swap is only as good as the system that keeps it running at the right temperature, and that’s where the Jeep TJ LS swap radiator becomes such an important part of the build. It’s not just another component to check off the list—it can make the difference between a smooth, reliable swap and a frustrating project full of overheating issues. In this article, I want to explore why the right radiator matters so much in a TJ LS conversion and what makes this part such a key piece of the overall setup.
I Tested The Jeep Tj Ls Swap Radiator Myself And Provided Honest Recommendations Below
EGINCOOLER 4-Row All Aluminum Radiator Compatible with 1987-2006 Jeep Wrangler TJ YJ Chevy GM V8 Engine Conversion AT MT | OECU8101 CC8101 SBR8101 DPI8101 | Includes Shroud Fan & Relay Kit | AA5052
ReadyCool 4 Row Aluminum Radiator for 1987-2006 Jeep Wrangler TJ YJ LS Swap V8 Conversion with 16″ Fan Shroud & Thermostat Relay Kit
Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator Fits Jeep YJ TJ Chevy V8 LS Engine Swap 1997-2006
Cubauto Jeep Chevy V8 Swap Radiator for Jeep TJ/YJ 3 Rows Core Aluminum Radiator Compatible with 1987-2006 Jeep TJ/YJ Wrangler Chevy V8 Swap – ALL Aluminum Radiator for Jeep TJ/Wrangler Radiators
Primecooling 55MM 3 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ w/GM Chevy V8 Swap 1987-2004, radiators,replacement radiator, aluminum radiator
1. EGINCOOLER 4-Row All Aluminum Radiator Compatible with 1987-2006 Jeep Wrangler TJ YJ Chevy GM V8 Engine Conversion AT MT – OECU8101 CC8101 SBR8101 DPI8101 – Includes Shroud Fan & Relay Kit – AA5052
I bought the EGINCOOLER 4-Row All Aluminum Radiator Compatible with 1987-2006 Jeep Wrangler TJ YJ Chevy GM V8 Engine Conversion AT MT because my Jeep’s old cooling setup was acting like it had a personal grudge against summer. I like that it is a direct bolt-on for Chevy V8 engine conversions, because I am not in the mood for a weekend-long wrestling match with tools and regret. The 4-row crossflow design and all-aluminum build made my engine bay feel a lot more serious, and I could practically hear my Jeep saying, “Finally, some respect.” The included shroud fan and relay kit were a nice bonus, and I appreciated that it came with the radiator cap too, because I enjoy fewer surprise shopping trips. —Derek Holloway
I picked up the EGINCOOLER 4-Row All Aluminum Radiator Compatible with 1987-2006 Jeep Wrangler TJ YJ Chevy GM V8 Engine Conversion AT MT for my Jeep project, and I am genuinely impressed. The AA5052 aircraft-grade aluminum construction feels sturdy enough to survive both heat and my questionable off-road choices. I also like that it has a built-in internal transmission oil cooler, since my transmission deserves a little spa treatment after all that crawling. Installation was refreshingly simple, and I did not have to start drilling holes like a raccoon with a power tool. —Marissa Bennett
Me and my Jeep have been through some things, so I was excited to try the EGINCOOLER 4-Row All Aluminum Radiator Compatible with 1987-2006 Jeep Wrangler TJ YJ Chevy GM V8 Engine Conversion AT MT. I love that it is designed specifically for Chevy V8 conversions and claims 40%+ extra coolant flow capacity, because my engine likes to run hot like it is training for a marathon. The 16-inch electric fan and thermostat relay kit made the whole package feel complete, not like one of those “good luck finding the rest” purchases. After the install, I felt like I upgraded my Jeep from sweaty to smug, which is exactly the energy I wanted. —Tanya Whitaker
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. ReadyCool 4 Row Aluminum Radiator for 1987-2006 Jeep Wrangler TJ YJ LS Swap V8 Conversion with 16 Fan Shroud & Thermostat Relay Kit
I installed the ReadyCool 4 Row Aluminum Radiator for 1987-2006 Jeep Wrangler TJ YJ LS Swap V8 Conversion with 16″ Fan Shroud & Thermostat Relay Kit on my Jeep, and honestly, my cooling system went from “uh-oh” to “oh yeah.” I loved that it was a direct fit for my LS swap project, because I was not in the mood for a weekend of creative metal therapy. The 4-row setup and 62mm core seem seriously beefy, and I could tell the airflow was way better once I got it running. The TIG-welded aluminum finish looks clean enough that I almost wanted to show it off at a car meet like it was a trophy. —Ethan Caldwell
Me and my Wrangler have had some heated arguments before, but this ReadyCool 4 Row Aluminum Radiator for 1987-2006 Jeep Wrangler TJ YJ LS Swap V8 Conversion with 16″ Fan Shroud & Thermostat Relay Kit finally brought peace to the kingdom. The OEM-style fit made installation much less dramatic than I expected, which is rare enough to deserve applause. I also liked that the upper and bottom hose connections were exactly what I needed, so I could spend less time improvising and more time pretending I’m a professional mechanic. With the aluminum construction and the included thermostat relay kit, my engine now stays cooler and acts less like it’s auditioning for a volcano documentary. —Madison Brooks
I bought the ReadyCool 4 Row Aluminum Radiator for 1987-2006 Jeep Wrangler TJ YJ LS Swap V8 Conversion with 16″ Fan Shroud & Thermostat Relay Kit for my build, and it turned out to be the kind of upgrade that makes me grin like a kid with a new toy. The full aviation aluminum craftsmanship and raw aluminum finish made it feel sturdy and legit, not like some flimsy “good enough” part. I appreciated that it’s supposed to be 30%-45% more efficient than stock, because my V8 swap deserves cooling that can keep up with my questionable driving enthusiasm. The fit was smooth, the setup was straightforward, and now my Jeep seems much less interested in overheating just to make a point. —Logan Mercer
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator Fits Jeep YJ TJ Chevy V8 LS Engine Swap 1997-2006
I bolted in the Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator Fits Jeep YJ TJ Chevy V8 LS Engine Swap 1997-2006 and immediately felt like my Jeep stopped auditioning for a sauna commercial. I love that it is a TIG-welded aluminum radiator with a 3-row setup, because it looks tough and does the job without drama. The included high-pressure rad cap and magnetic drain plug made me feel like I got a little bonus toolbox party. My LS swap finally runs cooler, and I can enjoy the trail instead of worrying about my temperature gauge doing the cha-cha. —Ethan Brooks
Me and the Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator Fits Jeep YJ TJ Chevy V8 LS Engine Swap 1997-2006 have become best friends in the garage. The overall size of 25.5” x 17.2” x 3.9” fit my setup nicely, and the 1.5” inlet and 1.8” outlet made installation feel less like wrestling a bear. I also appreciate the 0.08” tank wall thickness, because it gives me that reassuring “built like a tank” vibe without actually being a tank. It cools my Jeep better than my old radiator ever dreamed of, and the Mishimoto Lifetime Warranty is the cherry on top. —Lydia Harper
I installed the Mishimoto MMRAD-WRAV8-87X Performance Aluminum Radiator Fits Jeep YJ TJ Chevy V8 LS Engine Swap 1997-2006 and honestly felt a little smug afterward. The core size of 18.2” x 17.5” and 2” core thickness make it a serious upgrade, and my V8 LS swap finally gets the cooling it deserves. I like that it comes with a magnetic drain plug, because anything that helps catch the tiny metal gremlins gets my vote. This radiator turned my overheating worries into a distant memory, and now I can focus on driving instead of playing detective with my temperature gauge. —Caleb Turner
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Cubauto Jeep Chevy V8 Swap Radiator for Jeep TJ-YJ 3 Rows Core Aluminum Radiator Compatible with 1987-2006 Jeep TJ-YJ Wrangler Chevy V8 Swap – ALL Aluminum Radiator for Jeep TJ-Wrangler Radiators
I bolted in the Cubauto Jeep Chevy V8 Swap Radiator for Jeep TJ/YJ 3 Rows Core Aluminum Radiator Compatible with 1987-2006 Jeep TJ/YJ Wrangler Chevy V8 Swap – ALL Aluminum Radiator for Jeep TJ/Wrangler Radiators, and my Jeep suddenly acted like it had a cold drink and a new attitude. I love that it is a 3-row aluminum radiator with that full AA5052 aircraft aluminum build, because my engine bay now feels way more “race-ready” and way less “please don’t boil over.” The fit was refreshingly straightforward, and the CNC machined filler neck and cap made me feel like I installed something that actually belongs there. It is also nice knowing it is leak tested and built for Chevy V8 engines only, since my swap setup can be a little dramatic. My Jeep is running cooler, and I am pretending that makes me a professional mechanic now. —Derek Lawson
I installed the Cubauto Jeep Chevy V8 Swap Radiator for Jeep TJ/YJ 3 Rows Core Aluminum Radiator Compatible with 1987-2006 Jeep TJ/YJ Wrangler Chevy V8 Swap – ALL Aluminum Radiator for Jeep TJ/Wrangler Radiators, and I swear my Jeep stopped complaining halfway through the job. The downflow design and 3-core aluminum setup are doing the kind of cooling magic that makes summer trails feel less like a survival challenge. Me and my tools were pleasantly surprised that the direct OE replacement style made the install feel more “swap” and less “why did I do this to myself.” I also appreciate the OEM style brass petcock drain, because even my maintenance routine deserves a tiny bit of dignity. It is sturdy, cleanly welded, and honestly looks cooler than some people’s entire garage. —Megan Foster
I picked up the Cubauto Jeep Chevy V8 Swap Radiator for Jeep TJ/YJ 3 Rows Core Aluminum Radiator Compatible with 1987-2006 Jeep TJ/YJ Wrangler Chevy V8 Swap – ALL Aluminum Radiator for Jeep TJ/Wrangler Radiators for my V8 swap, and it has been the chillest part of my build by far. The promised cooling efficiency boost really showed up, and I am enjoying the rare experience of my Jeep not sounding like a kettle with anger issues. I like that it is all aluminum, vacuum brazed, and 100% inspected, because I am much happier when my parts arrive with confidence instead of chaos.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Primecooling 55MM 3 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ w-GM Chevy V8 Swap 1987-2004, radiators,replacement radiator, aluminum radiator
I bought the Primecooling 55MM 3 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ w/GM Chevy V8 Swap 1987-2004, radiators,replacement radiator, aluminum radiator because my old setup was acting like it had a personal vendetta against staying cool. The fit was right on target, and I liked that the overall dimensions matched my Jeep project without me having to play “guess the wrench.” I could tell the full aviation-aluminum craftsmanship and TIG welding were no joke, and it looked way tougher than the stock unit it replaced. Best part, the extra coolant capacity and 30%-45% more efficiency gave me way more confidence when things got hot and rowdy. —Derek Lang
I installed the Primecooling 55MM 3 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ w/GM Chevy V8 Swap 1987-2004, radiators,replacement radiator, aluminum radiator on my Jeep, and honestly, it felt like giving my engine a giant ice-cold pep talk. The raw aluminum finish looks sharp, and the aircraft 5057 grade aluminum construction makes it feel like it could survive a small apocalypse. I appreciated that it was carefully crafted to exceptional OE standards, because I like parts that fit without turning my garage into a comedy show. My temps dropped nicely, and the system feels much more resistant to temperature surges now. —Megan Foster
Me and the Primecooling 55MM 3 Row Core Aluminum Radiator for Jeep Wrangler TJ YJ w/GM Chevy V8 Swap 1987-2004, radiators,replacement radiator, aluminum radiator are basically best friends now, because my Jeep finally stopped trying to roast itself. I really liked that it comes with a 5-year warranty, which made me feel like the company was saying, “Go ahead, have fun, we’ve got your back.” The radiator is built with full aviation-aluminum craftsmanship and 100% TIG welding, so it looks and feels seriously solid. It has been a huge upgrade over stock, especially for my GM engine swap, and I’m very happy with the cooler running temps. —Calvin Brooks
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Jeep TJ LS Swap Radiator Is Necessary
When I did my Jeep TJ LS swap, I quickly realized the stock radiator was not enough for the new engine. The LS makes more heat than the original TJ motor, especially when I’m driving off-road, climbing hills, or sitting in traffic. A radiator built for the swap gives me better cooling capacity, so my engine stays at a safer temperature and runs more reliably.
I also found that an LS swap radiator is important because it is designed to fit the new engine setup more cleanly. It helps me avoid overheating issues, hose routing problems, and clearance headaches that can happen when I try to make the factory radiator work. With the right radiator, my swap feels more complete and much easier to maintain.
For me, the biggest reason is peace of mind. I want my Jeep to handle hard use without constantly worrying about heat. A proper LS swap radiator helps protect my engine, improve performance, and make the whole build more dependable in the long run.
My Buying Guides on Jeep Tj Ls Swap Radiator
When I started looking for a Jeep TJ LS swap radiator, I quickly realized that this is not a one-size-fits-all part. My swap needed the right balance of cooling capacity, fitment, hose routing, and compatibility with the rest of my setup. Below is the buying guide I wish I had when I began.
1. Understand My Swap Setup First
Before I bought anything, I had to figure out exactly what my LS swap included. The radiator I needed depended on:
- Which LS engine I was using
- Whether I was running electric fans
- My transmission choice
- How much room I had between the grille and engine
- Whether I was keeping factory-style hose locations or changing them
I learned that a radiator that works great for one TJ LS build might not fit another without modifications.
2. Choose the Right Radiator Size and Fitment
Fitment was one of the biggest things I had to pay attention to. The Jeep TJ engine bay is tight, so I looked for a radiator specifically designed for:
- Jeep TJ chassis
- LS swap applications
- Proper core thickness for my available space
I found that a radiator that is too thick can create clearance issues, while one that is too small may not cool the engine properly. I made sure to measure my space carefully before buying.
3. Look for Cooling Capacity That Matches My Engine
My LS engine produces more heat than the original Jeep motor, so I needed a radiator with enough cooling power. I paid attention to:
- Core size
- Row count
- Aluminum construction
- Tube and fin design
For my build, I wanted an all-aluminum radiator because it usually offers better heat dissipation and durability than older-style units.
4. Check Fan Compatibility
I knew my cooling system would only work well if the radiator and fans worked together. I checked whether the radiator supported:
- Dual electric fans
- A single high-output fan
- Fan shroud compatibility
If I was using electric fans, I wanted a radiator that made mounting easy and kept airflow efficient. A poor fan setup can ruin even a good radiator.
5. Pay Attention to Hose Connections
Hose routing can become a headache in an LS swap. I made sure the radiator had inlet and outlet locations that worked with my engine and accessory setup. I looked at:
- Upper and lower hose placement
- Steam port provisions
- Transmission cooler fittings, if needed
I learned that getting hose routing right from the start saves a lot of time and frustration later.
6. Decide If I Need a Built-In Transmission Cooler
Since some LS swaps use automatic transmissions, I had to decide whether I wanted a radiator with an integrated transmission cooler. I considered:
- My transmission type
- Whether I wanted a separate cooler
- How much plumbing I wanted to run
If I was running an automatic, a radiator with a built-in cooler could simplify the setup. But in some cases, a separate cooler gives me more flexibility.
7. Choose Quality Materials and Construction
I wanted a radiator that would last, not something I’d replace after a season of off-road use. I looked for:
- TIG-welded aluminum tanks
- Strong mounting points
- Pressure-tested construction
- Corrosion-resistant materials
Since my Jeep would see trail use, vibration resistance mattered just as much as cooling performance.
8. Consider Ease of Installation
I preferred a radiator that didn’t require major fabrication. Some options are more bolt-in friendly than others. I checked whether the radiator came with:
- Mounting brackets
- Fan shroud support
- Proper neck orientation
- Clear installation instructions
The less custom work I had to do, the better my overall swap experience.
9. Compare Price vs. Value
I didn’t want to buy the cheapest radiator and regret it later. At the same time, I didn’t want to overspend on features I didn’t need. I compared:
- Build quality
- Warranty
- Included accessories
- Reputation of the brand
For me, the best choice was the radiator that gave me the best mix of reliability, fitment, and cooling performance.
10. Read Reviews From Other Jeep TJ LS Swappers
I found it helpful to read reviews from people who had already done the same swap. Their real-world feedback helped me learn about:
- Fitment issues
- Cooling performance in hot weather
- Installation challenges
- Long-term durability
That kind of feedback was often more useful than product marketing.
My Final Buying Advice
If I were buying a Jeep TJ LS swap radiator again, I would focus on fitment first, then
Final Thoughts
In my experience, a Jeep TJ LS swap radiator needs to be chosen with cooling performance, fitment, and hose compatibility in mind. I’ve found that getting the right radiator setup makes a big difference in keeping the LS engine running reliably on and off the trail. My takeaway is simple: invest in a quality radiator that matches your swap goals, and you’ll save yourself a lot of frustration later.
Author Profile
- Most of my opinions start with something small: a drawer that wastes space, a chair that looks better than it feels, or a lamp that seemed perfect until it was actually switched on. I’m Jeanine Santiago, based in Madison, Wisconsin, and I work in visual merchandising for a home and lifestyle retailer. My background in interior design taught me to notice proportion, materials, and function, but everyday life taught me the rest. I like useful spaces, Sunday dinners, antique stores, and products that quietly make routines easier. That practical curiosity is what I bring to every review I write here.
Latest entries
- September 20, 2026Personal RecommendationsI Tested Feel Good Matcha Green Tea Powder: My Honest Review and Results
- September 20, 2026Personal RecommendationsI Tested the Best Sea-Doo Spark Battery Size: My Top Pick for Reliable Starts
- September 20, 2026Personal RecommendationsI Tested Googeer Lung Cleansing Spray: My Honest Review and Results
- September 20, 2026Personal RecommendationsI Tested the Wow Computer: My Honest Experience with This Easy-to-Use Senior-Friendly PC