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Mishimoto Aluminum Coolant Expansion Tank (15-18 GT, EcoBoost, V6)

Market Price $211.99 You Save 17% ($35.74)
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$176.25 (each)

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  • Item 389661
  • MPN# MMRT-MUS-15E

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    Features, Video & Details

    • Stronger Than Plastic Factory Tank
    • One-Piece Design
    • Polished Finish
    • Aluminum Construction
    • Fully TIG Welded for Durability
    • Includes Sight Tube for Coolant Level
    • Direct Fit Replacement
    • Reuses Stock Overflow Cap
    • Fits 2015-2018 GT, EcoBoost and V6 Mustangs

    Review & Installation Video

    Review & Install Video

    Hey guys. Stephanie with AmericanMuscle.com, here with a Mishimoto Aluminum Coolant Expansion Tank for 2015 and up Mustangs. The Mishimoto Aluminum Coolant Expansion Tank is perfect for those S550 owners out there that are looking for some underhood improvements. The factory coolant expansion tank is plastic, and it looks like a bubble which can leave a lot to be desired in the looks department, especially over time. The Mishimoto tank is not only more attractive, making for a better appearance, but it's also more durable and stronger than the factory plastic tank as well. Just looking at the Mishimoto tank here you can see that it's an obvious appearance upgrade right away. It has an attractive one-piece design instead of the stock two-piece design, and it's made from aluminum, and it has lovely welds on it. Even though this tank is powder coated black, the welds are obvious, and Mishimoto doesn't look like they were rushing when they were building this tank. If you weren't that into the black, Mishimoto does offer the same tank with a polished aluminum finish if you prefer that instead, or you always have the option of powder coating it your own color. These tanks are TIG welded which will give strength and durability, and the aluminum will be stronger than the factory plastic tank. So not only will this tank offer an appearance upgrade but it will also be more durable and hold up better than a plastic tank, especially in high performance applications. Like the factory tank, this tank also has internal baffles. The internal baffles will keep the coolant from sloshing around, so this means during braking or high speed cornering, and since the coolant won't be sloshing around it will stay close to the overflow cord therefore helping to prevent coolant starvation and air from entering the system. Another cool thing this tank has is a sight tube. The sight tube allows you to keep an eye on your coolant level at a glance, which is important since this tank is a solid blacked-out tank. This thing will be your new best friend. The tank will come complete with an overflow nipple on the fill neck so you can attach more reservoirs if necessary. It's also a direct fit replacement that's going to work on an S550 V6, Ecoboost and GT so you won't have to worry about making room for this tank, and it reuses a stock overflow cap as well. As far as price, you're looking at spending just over $175 for this tank. The polished aluminum version is the same price so you'll have a choice of which you like better. The tank is nicely made and has some nice features like the hot and cold fill lines, and at the end of the day you're investing in an item that will improve both looks and it will last longer than the factory plastic tank. The install for this overflow tank is very easy. I mentioned that it's a direct bolt-on replacement, which means that it will just take the place of the factory overflow tank, and it does reuse the factory cap. You won't need any special tools to complete the install, just a few sockets, a flat head and hose clamp removers, and it will take less than an hour to complete, and I'm going to call it a one out of three wrenches on the difficulty meter. You will want to drain some of the coolant so you can pull up your stock expansion tank, so having some extra coolant to fill up with is a good idea. The factory tank uninstalls by removing 3 hoses and 2 10 millimeter bolts. It doesn't get much easier than this here. You can clamp your hose down if you want to make sure you don't leak any coolant, and the new tank installs the same way the factory one came out. One hose on the bottom, two bolts on the fan shroud and two hoses on the top of the tank. The stock cap can then be installed, and the install can be finished by topping off and bleeding the coolant system. Wrapping things up here, the Mishimoto Aluminum Coolant Expansion Tank will help you add some additional reliability by upgrading the materials of the expansion tank. It will also add some styling to the engine bay in either black or polished aluminum. It will eliminate the unattractive factory two-piece plastic tank and replace it with a single-piece design that utilizes a sight tube, and you can check it out more online right here at AmericanMuscle.com.

    High Performance. Add some additional strength and reliability to your 2015-2018 Mustang with this polished Mishimoto Aluminum Coolant Expansion Tank. Replace that weak plastic eye sore that came on your S550, which is known to fail in high temperature situations, with this TIG-welded aluminum beauty. Improve both your underhood styling and coolant tank longevity with this Coolant Expansion Tank by Mishimoto.

    Durable Construction. Fully TIG-welded for durability and crafted from high strength 100% aluminum, this Mishimoto Coolant Expansion Tank will be much stronger, not to mention better looking, than the factory two-piece plastic tank. Featuring internal baffles to keep coolant from sloshing during high speed cornering, braking or acceleration, the baffles also help to prevent coolant starvation from the overflow ports on your S550 engine.

    Easy Installation. This Coolant Tank by Mishimoto has been designed as a direct fit replacement and comes complete with a sight tube to help keep an eye on your coolant levels at a glance. Complete with an overflow nipple on the fill neck to attach additional NHRA reservoirs if necessary, this tank comes with the necessary installation hardware for a simple install, taking just under an hour.

    Application. This polished Mishimoto Aluminum Coolant Expansion Tank is designed to fit on 2015-2018 V6, GT and EcoBoost Mustangs and reuses the stock overflow tank cap.

    Fitment: 2015 2016 2017 2018 Details

    What's in the Box
    • (1) Polished Expansion Tank
    • (1) Sight Glass Tube
    • (1) Overflow hose
    • (3) Worn-Gear Clamps
    • Mounting Hardware
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    15 Questions / 28 Answers

    Ask a Question

    Does this tank keep the new car warranty valid please?

    B8C

    • The Magnusson Moss Warranty Act: US Code – Title 15, Chapter 50, Sections 2301-2312, was created to protect consumer warranties. According to this act, a manufacturer such as Ford cannot void the warranty of a vehicle due to the use of an aftermarket part unless they can prove the aftermarket part directly cause or contributed to the failure of the vehicle.

      AMKody

    Helpful (2)

    I have a 2016 Mustang GT with a Roush supercharger. I believe I saw a pic with same configuration but wanted to make sure this will fit.

    SLEEPR

    • The Mishimoto Aluminum Coolant Expansion Tank will work with your Roush Supercharger.

      AMRobD

    Helpful (0)

    Would this work for 03 mach1 that has a SC coyote swap?

    Machnu1

    My cap will not screw on all the way is that a problem?

    CooperG

    • If you are having issues with your Mishimoto Aluminum Coolant Expansion Tank pleae give us a call at 1844-494-7745, we are open until 11pm EST!

      ChrisAM

    Helpful (0)

    Does anyone know if this tank would be compatible with the Injen evolution CAI for the 15-17 GT's? It looks like the vacuum line on that cai sticks out a fair amount.

    ArtD

    • The Injen Evolution Cold Air Intake will be compatible with the Mishimoto Aluminum Coolant Expansion Tank and will have no fitment issues.

      Rob D

    Helpful (0)

    Does the new mishimoto tank give a cold fill line and max fill line according to the engine your buying for??

    Levi

    • The Mishimoto Aluminum Coolant Expansion Tank has a standard minimum and maximum fill line for GT, Ecoboost and V6.

      AMJEFF

    Helpful (0)

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.7

    out of 5 stars




    • 4/5

      July 16, 2018

      Great looking tank but

      I took a couple hours this weekend and installed the coolant expansion tank. Looks great and well made but instructions are not that easy to follow. I was able to figure all this out but only concern was that the Stock Ford tank cap (which they state should be reused and fits perfectly) does not really fit perfectly. You hand screw in until it bottoms out but there is no click, nor does this cap align as mentioned on instructions.

      Lowell

      Year: 2017 Submodel: EcoBoost

      Helpful (0)

    • 5/5

      July 05, 2018

      World of difference

      Was easy installation. And looks good under the hood.

      Dannys50

      Year: 2017 Submodel: GT

      Helpful (0)

    • 4/5

      June 12, 2018

      I have a leaker!

      Need to get a hold of somebody here with AmericanMuscle, tanks been on the car a couple of weeks and it’s developed a leak on the weld front right but ease of putting it in was perfect the look and the Ability to get rid of the plastic turtle was is even better.

      Terry

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      June 07, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      Great look

      Easy to install and looks great for the engine bay.

      KyleM

      Year: 2015 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      May 25, 2018

      What an eye catcher!

      As I said in the post with the pics I submitted. The Mishimoto Aluminum Coolant Expansion Tank will get the attention of on lookers, as soon as you raise the hood. There were no instructions included with the hardware, so common sense had to prevail. As always, fast service from AmericanMuscle.

      Wingnut

      Year: 2018 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      May 24, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      sweet

      great looking product easy to install instructions easy to follow

      BA

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      May 01, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      Much cleaner look

      For the small difference in price vs the plastic coolant expansion tank cover, this tank is a much better value. Very easy install and looks great!

      DonnyB

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      April 29, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      Great

      Looks good in the car better then the plastic one. Very easy install

      Rafael

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      April 26, 2018

      Better then stock

      Fits great looks a lot better then stock fast shipping was here a day before it should have been

      David

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      April 23, 2018

      Simple beauty

      Simple install, took about 30 min, plus looks great under the hood

      BrianH

      Year: 2017 Submodel: V6

      Helpful (1)

    • 5/5

      April 10, 2018

      Awesome

      The product arrived prior to the estimated date perfect finish and looks great installed. Great customer service department.

      CharlieG

      Year: 2018 Submodel: GT

      Helpful (2)

    • 5/5

      April 03, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      Looks great

      Just feels right in the engine bay, the old coolant bottle was a pet peeve of mine, this one just fits better and looks better. Great buy for the price. Easy install.

      BrettD

      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      April 02, 2018

      Quality product

      Looks great, nice welds, easy install, if your going to have your hood up at car shows its the way to go

      RobertK

      Year: 2005 Submodel: V6

      Helpful (2)

    • 5/5

      March 31, 2018

      Must Have!

      If anything distracts from a good looking engine bay, it's the stock bubble cloud looking coolant expansion tank. The Mishimoto Aluminum Coolant Expansion Tank is an affordable attractive and quality upgrade. It definitely gives the Mustang the looks it deserves.

      SergeantFit

      Year: 2017 Submodel: EcoBoost

      Helpful (2)

    • 4/5

      March 26, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      Great looking replacement for the stock tank

      A well designed tank that fits perfectly to replace the stock tank. It has a great look that fits the engine bay style. My first tank had a finish defect and AM accepted the return and sent a replacement quickly. My only difficulty with this tank, making it 4/5, is the fit of the coolant cap. It's very hard to screw the stock cap on. Feels like it's cross threaded but wasn't. The finish is holding up great and still looks new.

      03YellowGT

      Year: 2015 Submodel: GT

      Helpful (2)

    • 4/5

      March 10, 2018

      Not bad for engine bay

      Bought this product becz the AM folks were too pricey w/the plastic cover over the stock reservoir plastic grenade...installation fairly easy but manufacturer added another port that stock tank didn’t have—instructions not real clear but apparently it’s an extra drain tube that gets routed into the lower engine bay? Decent product but choose the right finish becz it is very prominent in the engine compartment

      Alan

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      March 07, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      Solid purchase, instant gratification

      You've read the other reviews. I just had mine installed. It looks REAL good, an very nice upgrade from that plastic bubble thing. It ALSO has a little bubble-gauge on the side to show coolant level. BONUS

      saunterer

      Year: 2016 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      February 05, 2018

      Review from Mishimoto Aluminum Coolant Expansion Tank - Black (15-18 GT, EcoBoost, V6)

      Good Visual Upgrade

      Mine fit awesome, unlike some of the other reviews. No real performance upside, but looks a lot better than the plastic stock tank. Only thing to watch out for is to make sure the fittings on the side of the tank are tight, mine were just finger tight in the side, so I'm glad I checked. Other than that, it's a great addition to any engine bay.

      Matt

      Year: 2015 Submodel: V6

      Helpful (2)

    • 5/5

      February 03, 2018

      Big upgrade

      Great product! Definitely makes it look much better. The old plastic reservoir was ugly and just didn’t belong on this amazing car. Chrome looks amazing and matches great with the ingot silver.

      silverstang

      Year: 2015 Submodel: V6

      Helpful (1)

    • 5/5

      January 29, 2018

      Rod's mustang "Thor"

      Looks great. I can't believe what a huge difference it made in the looks!!

      AngiE

      Year: 2017 Submodel: GT

      Helpful (2)

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