![]() Billet Aluminum 32mm Pressure Cap Receiver They are lightweight black anodized aluminum and are used for push-lok style 3/8" ID hose.Ī laser cut black powercoated laser cut mounting bracket is included. For a list of other 6AN ORB adapter fittings that can be used, go HERE. Included are three -6AN female 90 degree hose ends that screw onto the three -6AN male port fittings. For a list of other 10AN ORB adapter fittings that can be used, go HERE. The side port is machined with 6AN ORB threads. ![]() The tank features three O-ring boss ports for a positive seal. Included are -6AN male adapter fittings (not tapered pipe threads). The lower ports are machined with 10AN ORB threads. This is to help aid in deaerating the system. Hot pressurized coolant from the cylinder head is sent into the vortex chamber's inlet tangentially and accelerated to a high rate of rotation. The Radium Engineering coolant header tank also has an internal swirl feature, as shown below. Instead, it is designed to part of the pressurized coolant system. This product is not a coolant overflow tank. There is cross-over passages at the top and bottom. These chambers are NOT isolated from each other. The coolant expansion tank features two internal chambers. The radiator cap must have a Type-A seal as shown HERE. The two halves (shown below) are bolted together along with a CNC billet aluminum radiator neck which accepts a standard 32mm "Mini" style pressure cap. It is a 2-piece design constructed of CNC billet 6061 aluminum. The Radium Coolant Expansion Tank holds 750mL. A coolant expansion tank permits the radiator to be 100% filled with coolant in all conditions. To allow heat expansion, traditional coolant systems require air to be present in the top portion of the radiator during low temperatures. However, expansion tanks are also valuable if integrated in a common radiator setup. When the engine is cooled, a vacuum is made that sends the coolant back to the radiator and the system.Coolant expansion tanks are necessary for proper air bleeding in applications that utilize a rear mounted radiator or a low mounted radiator such as a V-Mount. It does so by a pressure-sensitive on the radiator valve that sends it to the overflow tank. The radiator coolant overflow reservoir is important to regulate the pressure that is produced due to the heat from the engine. When the engine is cooler, instead of the pressure pushing the fluid (due to the heat), a vacuum will be made, pulling the coolant back into the active cooling system. The process of returning the fluid is similar to sending the fluid. This begs the question, what about when the heat dissipates and the pressure lowers? In that case, the overflow reservoir will send back the coolant to the active coolant system. In other words, the pressure created by the heat will be regulated by moving the coolant to the overflow tank. When the pressure rises, it will push the pressure cap (hence the name), sending the “excess” coolant to the overflow reservoir tank. The radiator, through which the coolant is pumped, has a pressure cap on top that plays a vital part in the overflow tank mechanism. Keeping in mind the points mentioned above, we know that there is a closed system in question with fluid inside that is subject to heat. So how does a coolant overflow tank manage this? The short answer is “cool physics.” The longer answer is down below. Without an overflow tank, the pressure would risk destroying the whole system, leading to potentially expensive repairs. The overflow tank combats this as it maintains the optimal pressure for the system to work while keeping the excess fluid (pressure) to later be returned when the engine cools down. This means that no fluid is getting in or out of the system (unless there is a leak).ĭue to the heat produced by the engine, the pressure of the system will increase. The most important thing to consider is that the cooling system of a car is a closed system. Before we get into how the radiator coolant overflow tank works, it will be of great benefit to know why one is needed.
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