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Ford Fiesta ST Coolant Expansion Tank 2014+

  1. Say No to Plastic - Coolant Expansion Tank, Post 2: Final Prototype

    Say No to Plastic - Coolant Expansion Tank, Post 2: Final Prototype

    It has been a while since we took a look at what is going on in the world of the Fiesta expansion tank. In our last post we test fitted our 3D-printed prototype on the Fiesta ST. After fitment was confirmed, we played the waiting game for our final prototype's arrival at our development facility. Our best efforts at being patient paid off when we had two packages arrive this morning!

    Fiesta ST expansion tank Fiesta ST expansion tank

    Fiesta ST expansion tank Fiesta ST expansion tank

    Each expansion tank comes with an overflow hose and

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  2. Say No to Plastic - Coolant Expansion Tank R&D, Part 1: Initial Design

    Say No to Plastic - Coolant Expansion Tank R&D, Part 1: Initial Design

    Time to dive into yet another Fiesta ST project! This little Fiesta is getting the royal treatment at Mishimoto; over the last few months it has been fitted for numerous upgrades. If you are in the mood for a recap, you can check out some of the other Fiesta posts here on the Mishimoto blog. For now we'll dive right into our development of Mishimoto's expansion tank for the Fiesta ST.

    Stock Expansion Tank

    Here at Mishimoto we feel a certain type of way about plastic. It is not that we have a vendetta against plastic, but we see an area where we can improve upon some of the stock Fiesta ST parts. Plastic expansion tanks in general (or any plastic parts) are more prone to failure than an aluminum part would be. Plastic becomes brittle with age, exposure to elements, and the repeated heat cycles in the engine bay. Replacing the plastic tank with an aluminum one not only looks better, but it also would be less prone to bursting or cracking especially as the

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