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Ford Focus ST Expansion Tank 2013+

  1. Tank Love - Expansion Tank R&D, Part 2: Final Reveal

    Tank Love - Expansion Tank R&D, Part 2: Final Reveal

    I told you this project was going to move fast. In the last update, we laid down our design plans for how we will give this RS coolant expansion tank some sprucing up. Not only did we make the tank more pleasing to look at, we also increased the capacity and added a neat sight tube so you can check your levels with ease. You guys have been asking for it, so let's get up close and personal.

    The stock unit pales in comparison to the size of the Mishimoto tank.
    The stock unit pales in comparison to the size of the Mishimoto tank.

    One of the first things you'll notice with this tank is the capacity increase over the stock unit. We are making this tank to fit both the Focus RS and ST, but that doesn't mean we have to stay within the size parameters

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  2. Tank Love - Coolant Expansion Tank R&D, Part 1: Design Plans

    Tank Love - Coolant Expansion Tank R&D, Part 1: Design Plans

    Anyone with a car older than 15 years or so likely has a coolant expansion tank with the structural integrity of wet toilet paper. These tanks rarely get aesthetic love in the factory vehicle design. They are usually plastic, look weird and can start cracking given enough time. After 20 years, the expansion tank in my 1995 Nissan 240SX project car will literally begin crumbling around your finger if any sort of pressure is applied. We don't want that happening to your RS/ST a decade or two from now, so we decided to design a sweet looking expansion tank that will outlast the car and be a nice addition to your engine bay.

    The stock cap is has a pressure limit of 21psi
    The stock cap on the RS has a pressure limit of 21psi

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