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Mishimoto Aluminum Performance Radiator (87-06 Jeep Wrangler YJ & TJ)

Item J100246
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$367.95 (kit)

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      Review & Installation Video

      I'm Ryan from and this is my review of the Mishimoto aluminum performance radiator fitting all 1987 to 2006 Wranglers. Today we're going to talk about the construction and of course the installation of this radiator. This radiator is going to be for those of you who need to replace your factory existing radiator because it is leaking, but I would not recommend this for those of you who are having overheating problems. If your TJ or YJ are overheating, chances are you have a problem with either the water pump, the thermostat or you need to have the coolant system properly flushed. And I would recommend those fixes before I go and spend big money on a performance radiator like this.While this radiator is designed to be very efficient, the OE radiator is more than optimal to cool almost any YJ and TJ in any off road or on road conditions. However, if you are looking for an all-aluminum radiator, this one from Mishimoto is a very high-quality option. This radiator is made from brazed aluminum and it has polished end tanks. The radiator has a .89 gallon capacity and Mishimoto claims a 20% increased efficiency in cooling over your factory radiator. This will work with both automatic and manual transmissions because it does have a transmission cooling tank on the bottom of it and a couple of different adapters to work with your factory automatic trans cooler. As I mentioned before, the OE radiator is going to be more than sufficient for most TJs and YJs in most driving conditions. In fact, the factory radiator is an aluminum core radiator, so it shares a lot of similarities with this radiator. Of course the factory radiator does have plastic tanks where this one has aluminum, so that is going to be an upgrade for this radiator over the factory.Getting this radiator installed in your Jeep is going to be a very simple process because it's designed to install just like your OE radiator. The first step is to get that old radiator out of the way. To do that, you'll want to first drain the system by using the petcock on the factory radiator. Then, pull the upper and lower coolant lines and finally your trans cooler lines if you have an automatic transmission. After that it's just a matter of removing the fan shroud and the bolts that hold the radiator onto the core support, then you can lift it out through the top. After that you can drop your new radiator in being careful not to bend or break any of the new fins and then reinstall it in the opposite steps that you uninstalled the factory one. Bolt the radiator to the core support, reinstall your fan shroud, reattach those automatic trans coolant lines if you have them and the upper and lower rad hoses.While you have the radiator out, this is a really good time to do a full coolant flush. Regardless, when you refill the radiator, you'll want to make sure that you're refilling it with the proper type of coolant which should be the same type of coolant you had in the system before. There are a few types of coolant out there these days and you certainly don't want to mix and match. If you have a TJ, this is also a really good time to blow out your heater core to make sure you're getting maximum heating in the cab.Once you have the system all hooked up and filled back up, you can bleed the cooling system in a couple of different ways. There are pressure bleeders that you can use, but the more old school way that is tried and true is to park the Jeep on a slight uphill, leave the radiator cap off and let the Jeep idle. As it comes up to temperature and the thermostat opens, it'll cycle all of the air out through the top of the radiator, and as long as you continue to top it off and keep your overflow tank full, you'll get all of the air out of the system no problem.This whole installation will probably take you around two hours, maybe a little bit more by the time you get everything bled out. You won't need any specialty tools, just a few gallons of coolant and some hand tools to get everything installed.As I mentioned before, an OE replacement radiator is going to be more than sufficient for most TJs and YJs. Even in the harshest desert off-road environments, they're going to be more than enough to keep your engine cool if your coolant system is in good condition. However, if you are looking to replace your radiator with one that's all-aluminum and doesn't have the plastic tanks that the OE radiator has, I think this is a really nice option. Of course you are going to pay significantly more than an OE replacement for this all-aluminum radiator from Mishimoto. You're going to be about three times the cost of an OE radiator for this option.If you're looking to replace your OE radiator with an all-aluminum version, I think this one from Mishimoto is definitely worth a second look. This is going to be significantly more expensive than an OE replacement but you are getting an all-aluminum radiator. That's my review of the Mishimoto aluminum performance radiator fitting all 1987 to 2006 Wranglers that you can find right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Features Brazed Aluminum, Polished End Tanks
      • Prevents Overheating
      • Effortless Installation
      • Fits 87-06 Jeep Wrangler YJ & TJ Models


      Performance. Enhance your Jeep Wrangler's performance with the Mishimoto Aluminum Performance Radiator. It is designed to optimize cooling efficiency by up to 20% and prevent overheating.

      Construction. The Mishimoto Jeep Wrangler radiator has lightweight dual core end tanks made of aluminum. It has a 0.89 gallon capacity.

      Parts Included. This Mishimoto radiator has a magnetic drain plug, a radiator cap and 6 transmission adapters.

      Compatibility. This downflow radiator is designed to fit 87-06 Jeep Wrangler YJ & TJ models.

      Fitment: 1987 1988 1989 1990 1991 1992 1993 1994 1995 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Details

      MPN# MMRAD-WRA-87

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (45)

      Write a Review

      Ratings Summary

      4.2 out of 5 overall rating from 45 customers

      Installation Time: Afternoon

      • February 20, 2020

        1 2003 Wrangler - Ogre Installation Time: Afternoon

        Not good

        Customer service was great but had to install three radiators. They all leaked on the passenger side down low engine compartment side. Had to pay shipping each time. Eventually went with OEM radiator from Napa for 1/3 the price. Would give it -5 stars if I could.

        Helpful (0)
      • December 15, 2019

        1 2002 Wrangler - BKeltz Installation Time: Afternoon

        Update to my previous review. BK

        This is an update to my previous review under BK. Again, had to go and buy the hardware, no big deal. It did make the Jeep run cooler so that was good. However, I bought the radiator in February of 2019 and it is now December 2019 and there is a pretty good leak in it already. Haven’t been off road since I installed, just driving to work, so that says something about the quality. DON’T BUY THIS RADIATOR. I am now going to have to buy another, it won’t be this one.

        Helpful (4)
      • September 06, 2019

        5 2003 Rubicon - Squatch Installation Time: Afternoon

        Very nice radiator

        I waited about a year to write this review, I put this radiator in and ran it all summer in hot conditions. Not one drop leaked and it is looking real good. I did use the Mishimoto hoses which come just a little bit long and needed to be trimmed. That's how you want it, because if you get a short hose you can't add length, engineered right. I have an 03 TJ Rubicon and it runs it's best at 210 degrees. Exactly where I was at after install. I can run up hills with the AC on and it climbs a little in the summer heat but what is awesome is how fast the temp drops after you stop or crest the hill. Excellent product, no doubt!

        Helpful (3)
      • August 28, 2019

        4 2000 Wrangler - Q8ieng

        A good quality radiator

        After I had installed it and used it, if you're facing a heat issue before installing Mishimoto then get a new OEM Mopar radiator would be better. But great quality after all.

        Helpful (2)
      • August 27, 2019

        4 1994 Wrangler - AndrewE Installation Time: Less than 1 Hour

        Amazing product

        Only 4 stars because of shipping experience. Short install time because I already had the front of the Jeep off because of a restore project. Product keeps my Jeep at the perfect temperature.

        Helpful (1)
      • July 30, 2019

        5 2006 Wrangler - Johnnyfloyd Installation Time: Less than 1 Hour

        No surprises

        No surprises. It was exactly what I thought it would be. Sometimes after reading a review or ordering something it isn't what it seems. Exact fit. Easy to install. Runs Cooler. Looks Cool. What else could you want?

        Helpful (1)
      • July 15, 2019

        5 2004 Wrangler Unlimited - Chris Installation Time: Less than 1 Hour

        Mishimoto aluminum radiator

        Very satisfied with this radiator perfect fit looks excellent and new fan shroud fit perfect also brought temperature down in my Jeep would highly recommend this radiator to everyone

        Helpful (1)
      • April 30, 2019

        4 2003 Wrangler - Jeepgrl1991 Installation Time: Afternoon

        Huge difference!

        So, I installed my radiator a month ago, installation was pretty basic, the only issue was that the hardware included did not fit the factory hardware on my jeep from my older radiator but that was an easy fix. I ran to the hardware store to replace all the old hardware on my jeep to fit the new hardware included in the Mishimoto radiator. Probably spent like 15 bucks on new clips and washers and nuts. Installation took me about 4 hours.

        Helpful (1)
      • April 23, 2019

        4 2003 Wrangler - BUD Installation Time: Afternoon

        Shure beets plastic cap rariator

        I read revews and knew to expect hardware fit. But hay the assorted stainless bolts from harbor freight I had left over from another project was all I needed. The fit was great but I was surprised buy how much antifreeze it holds. I'm sure this can be installed faster but I was putting this in one handed with a beer in the other.

        Helpful (2)
      • April 11, 2019

        1 2001 Wrangler - Goatar Installation Time: Full Day

        Sad Day!!!

        Finally got it installed. Yes the bolts that come with it DO NOT fit the thread of a 2001 TJ. Advance had M6-30 that fit perfect. Pin hole leak detected where the transmission cooler meets the fins. About to contact WTY.

        Helpful (4)

      Questions & Answers (12 answers)

      5 Top Rated Questions

      I've had past problems with this radiator with hoses leaking at the inlet and outlet of both upper and lower hose. What are the radiator in and out dimensions. I've tried several different hose manufacturers for my 97 tj sport. They all seep fluid.

      • The Mishimoto Aluminum Performance Radiator has inlet measurement of 1.26" and outlet measurement of 1.50"- you should be able to reuse OEM hoses for install.

      Helpful (2)

      How many cores in this radiator and what are its dimensions?

      • The Mishimoto Aluminum Performance Radiator is a 2 core radiator and features an overall size of: 25.8" x 23.0" x 3.7"

      Helpful (1)

      Will this work with a manual transmission, as in with no transmission cooling lines?

      • The Mishimoto Aluminum Performance Radiator is compatible with manual and automatic transmissions. It will have plugs to cap the holes for the automatic transmission fittings.

      Helpful (1)

      This being a performance radiator, would it be sufficient cooling for a small block Chevy swap? Not worried about fitment, just the performance.

      • This has not been tested with this motor swap.

      Helpful (0)

      will this fit with either motor 2.4l or 4.0l ?

      • This will fit both 2.4L and 4.0L motors.

      Helpful (0)
      Post Your Question
      1 More Question
      What is the size and thread pitch for the transmission cooler ports? 1 answer

      Installation & What's in the Box

      What's in the Box

      • (1) Radiator
      • (1) Radiator Cap
      • (1) Magnetic Drain Plug
      • (6) Transmission Adapters

      Will It Fit My Wrangler

      • TJ Rubicon 2 Door - 03, 04, 05, 06
      • TJ Rubicon Unlimited 2 Door - 05, 06
      • TJ Wrangler 2 Door - 97, 98, 99, 00, 01, 02, 03, 04, 05, 06
      • TJ Wrangler Unlimited 2 Door - 04, 05, 06
      • YJ Wrangler 2 Door - 87, 88, 89, 90, 91, 92, 93, 94, 95