Radium Engineering’s Coolant Tank Design
Constructed of Billet 6061 Aluminum and powdercoated for durability and good looks, Radium Engineering designed their Coolant Expansion Tank with severe duty in mind. Its design features the three standard ports in a novel configuration: the radiator vent and return line are -10AN ORB (O-Ring Boss) ports on the bottom of the tank, and the steam line from the engine leads to the -6AN ORB port on the top.
The top steam line port is designed for improved deaeration of coolant. It tangentially leads to a circular swirl chamber. The coolant leaving the engine through this line is swirled at a high rate of speed, and this centripetal acceleration efficiently spins any air or steam bubbles away from the coolant before returning the now deaerated coolant to the coolant system. Passages machined into the top and bottom of the swirl chamber allow coolant to mix and provide deaeration from both the radiator vent and steam lines.
The compact design of Radium’s Coolant Expansion Tank allows it to be mounted virtually anywhere in an engine bay, freeing up space for forced-induction piping or allowing V-mount or rear-mounted radiators. The oversized AN ORB fittings allow easy interfacing or conversion to braided stainless lines.
Radium’s Coolant Expansion Tank is available by itself for use in custom applications. Radium also has kits available for the ‘11+ Ford Mustang (S197 and S550), Ford Focus ST and Lotus Elise/Exige. These kits include the universal tank, an application-specific bracket, and the AN fittings and hoses required for installation.
If installing Radium’s tank in an application that doesn’t normally have an expansion tank (for instance: ‘90s Hondas), simply seal off the stock radiator cap and install Radium’s expansion tank in a suitable location.
Assembling and Installing Radium Engineering’s Coolant Expansion Tank
Now, onto the assembly!