aluminum expansion tank

It goes without saying that the cooling system routed throughout the engine bay of any vehicle works best when the coolant stays in the system. It's one of the main design requirements in fact. If that sounds familiar, that's because this same statement was made about the Ford 7.3 Powerstroke's expansion tank, which begs the question, is there a chink in the armor of Ford's self-proclaimed tough built trucks?

While most of the F-150 is "Built Ford Tough" the factory expansion tank doesn't exactly live up to that standard.

Don't get me wrong, the F-150, for the most part, lives up to the widely recognized moniker. Ford designed them specifically to put up with the constant punishment that the pickup truck was originally intended for -- blasting through rugged terrain all with a loaded bed and a trailer in tow. There's a reason why it's been the best-selling pickup truck for the past 40 years. That being said, nobody's perfect. After a little scouring of the internet, it turns out the twelfth-generation

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 on the RS has a pressure limit of 21psi

Factory expansion tank for the ST

There is a lot of focus (I haven't made that pun in a while, give me a break) devoted strictly to improving how this EcoBoost hot-hatch platform performs since it's introduction. This is important, our engineers have that as a clear goal in their minds. For our RS, we've released an