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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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    Features, Video & Details

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

    Review & Installation Video

    Review & Install 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

    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


    CA Residents: WARNING: Cancer and Reproductive Harm -

    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

      Customer Photos (13) Submit Your Photo

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        Questions & Answers (11)

        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)

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

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

        Helpful (0)

        What is the size and thread pitch for the transmission cooler ports?

        • This will utilize OEM sized trans cooler ports.

        Helpful (0)
        Post Your Question
        6 More Questions
        Will a factory fan shroud be a direct fit for this? 1 answer
        This is a direct fit with no modifications, correct? Any recommendations on an electric fan to attach to it? 1 answer
        The only question I have is how many cores does this radiator consist of? 1 answer
        Will this radiator work with a small block chevy 1 answer
        Will this radiator work with the 06 Unlimited 2 door? 1 answer
        how many cores? I am looking for a four core radiator. 1 answer

          Customer Reviews (44) Write a Review

          Ratings Summary

          4.3 out of 5 overall rating from 44 customers

          Installation Time: Afternoon

          • 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 (2)
          • 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 (1)
          • 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 (1)
          • 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 (0)
          • 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 (0)
          • 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 (0)
          • 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 (0)
          • 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 (0)
          • 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 (2)
          • March 15, 2019

            1 2018 Rubicon - GBarclay

            3 radiators in 4 months

            This radiator ended up costing me a fortune in installation. I’ve had Mishimoto warranty out 3 radiators I’m just 4 months. Sure they cover the cost of the radiator but when I hVe to pay the labor to get it installed each time then it’s not worth it. Not impressed, they admitted they are aware of an issue with the radiators for this year range of Jeeps. Wish I would have known before the 1st radiator

            Helpful (2)
          • March 13, 2019

            4 2002 Wrangler - BK Installation Time: Afternoon

            Radiator swap

            So far, very nice product. Engine runs 15 degrees cooler and it was fairly easy to install. I did have to run and get new hardware but not a huge deal.

            Helpful (3)
          • March 12, 2019

            5 1993 Wrangler - Niel Installation Time: Less than 1 Hour


            I bought this radiator for my 93 Jeep and everything about it is fantastic!!! It was super easy to install (30 min) and holds almost 2 gallons of 50/50... The only thing I’d say change is maybe giving customers new fastener nuts for the main bolts. The old ones are usually broken on older model Jeeps.

            Helpful (2)
          • March 04, 2019

            3 2005 Wrangler Unlimited - RichardG Installation Time: Afternoon

            My 05 LJ

            This is my second Mishimoto radiator I have installed on my LJ. The first one lasted about a year. So I'm hoping it was a fluke and this one will last longer. I did have to buy longer bolts to install the fan shroud.

            Helpful (2)
          • March 02, 2019

            5 1999 Wrangler - DennysB Installation Time: Afternoon

            So far, so good

            Too soon to tell, but so far it's been working great. Radiator fitted right in. I'm been dealing with radiator problems for years. This one fixed it. We'll seen.

            Helpful (1)
          • February 11, 2019

            5 2004 Wrangler - MichaelS Installation Time: Less than 1 Hour

            Nice radiator

            Dropped right in, bolted up. No issues. At running temps in 15 minutes. Solid alum, no plastic.

            Helpful (6)
          • February 10, 2019

            4 2004 Rubicon - Steve Installation Time: Less than 1 Hour

            Great fit

            Built solid, easy installation. Lowered my operating temp by 20 degrees. The only thing I could find wrong was the bolts they supplied for the fan shroud don’t fit the nutserts, however if you keep your factory bolts no problem

            Helpful (4)
          • February 01, 2019

            5 2000 Wrangler - GaryE Installation Time: Afternoon

            Mishimoto radiator

            This radiator is twice as big as what was factory and so far it has been working very well. No more over heating. I will have to wait until the summer weather to get a true reading on the value of the switch but si far it is doing very well.

            Helpful (3)
          • January 20, 2019

            2 2004 Wrangler - HaroldS Installation Time: Afternoon

            Comes with the wrong bolts

            First off, no directions. Not really a problem, but there are things like a tab that needs removing if you have air conditioning. This shows up when you test fit it. The larger issue is the bolts sent with it for mounting. They are absolutely unusable unless you retap the mounting clip nuts. Diameter is too large. No documentation (the video you can find on the Mishimoto sight doesn’t mention the aircon tab). Although the radiator looks great, I’m very concerned by the lack of quality control. Unless you have have another vehicle to run and buy bolts, your Jeep is going to be disabled. No excuse for this kind of shoddy QC. The radiator was well packaged and automatic transmission cooling line adapters are included, though I don’t know if they work, my Jeep is manual transmission. Installation time icludes driving into town ( 22 minutes one way) to buy bolts.

            Helpful (6)
          • January 08, 2019

            5 2006 Wrangler Unlimited - James Installation Time: Full Day

            Mishimoto replacement radiator

            Product looks very well built, simple to install took a little time with the Mishimoto electric fan installation. Pleased with the purchase would recommend it to others.

            Helpful (5)
          • October 31, 2018

            5 2004 Wrangler - RaeL Installation Time: Less than 1 Hour

            Works great! Hardware not meant for TJ

            I’ve had a plastic radiator that kept popping and finally decided to upgrade to mishimoto radiator. Some of the bolts don’t quite fit correctly in a TJ so hopefully you have some of your own spare hardware you can use.

            Helpful (4)