Radium Coolant Tank Kit, Lotus Elise/Exige 2Zz-Ge, Firewall Mount

The Radium Remote Mounted Coolant Swirl Tank is commonly required for custom Lotus applications such as engine swaps, turbocharger kits, etc. where the OEM expansion tank is no longer in an ideal location. The Radium Coolant Expansion Swirl Tank features three ports that use -6AN to 9/16-18 O-ring adapters (not tapered pipe threads) for a positive seal. The main tank is a 2-piece design constructed of cast aluminum. The two halves (shown below) are welded together along with a CNC billet aluminum cap receiver which mates to any standard 32mm "import" style pressure cap. Coolant expansion tanks are necessary for proper air bleeding in applications that utilize a low mounted radiator. The Radium Engineering tank also has an internal swirl feature. Hot pressurized coolant from the cylinder head is sent into the vortex chamber's inlet tangentially and accelerated to a high rate of rotation. This is an old hot rod trick to help aid in deaerating the system.

Included are three -6AN female 90 degree hose ends that screw onto the three -6AN male coolant tank port fittings. They are lightweight black anodized aluminum and are used for push-lok style 3/8" ID hose. All coolant tanks are pressure tested in house and then powder coated texture black and laser etched. Also included is a black powercoated laser cut mounting bracket.
Legal only for use in competition vehicles which may never be registered, licensed, and/or used on public streets or highways; and also for use in other exempted vehicles.