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How to Install Mishimoto Aluminum Coolant Expansion Tank (15-19 GT, EcoBoost, V6) on your Ford Mustang

Installation Time

60 minutes

Tools Required
  • Needle-Nose Pliers
  • 1⁄4 or 1⁄2 inch Ratchet
  • 7mm Socket
  • 10mm Socket
  • Short Extension
  • Small Container to hold the fluid from the existing Coolant Tank.
View PDF Guide
American Muscle
Shop Parts in this Guide

Note: Before beginning, be sure the tank has had plenty of time to cool down before starting.


Step 1 Remove the two top hoses.

Step 2 Cap off the hoses with a plug or bolt to prevent coolant leakage.

Step 3 Remove the two existing mounting bolts from the factory tank.

Be sure the existing mounting clips stay with the fan shroud.


Step 4 Lift the tank making sure the bottom hose stays connected. Empty the coolant from the factory tank into a small container (make sure it will hold all the coolant from inside the factory tank).

Step 5 Remove the bottom hose, making sure it is kept upright so the coolant does not leak.

Step 6 Remove the clamp from the bottom hose and slide on the new provided clamp. Tighten it just enough so it will not slide off.

Step 7 Install the hose to the bottom of the new tank then position and tighten the clamp.

Step 8 Place the cutout tab (Figure A) into the cutout slot (Figure B) on the fan shroud bracket.

Step 9 Line up the screw holes, install the new provided mounting bolts and tighten.

Step 10 Remove the plug from one of the two top hoses and remove the factory clamp. Slide on the provided new clamp, install the hose to the new tank, then position and tighten the clamp.

Step 11 Repeat this step for the second top hose. Fill the new tank with the coolant drained from the factory tank and add additional coolant to the halfway point using the sight tube on the side of the tank if necessary. Install the factory cap on the new tank.

Step 12 Install the provided vent tube with the provided clamp route it so it doesn’t interfere with the fan or any other component.

Before and After

Installation Instructions Created by AmericanMuscle Customer: Kevin H. on 5/30/17

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