Radium - Elise/Exige Coolant Expansion Tank OEM Location Kit

SKU: 20-0270-01
Radium - Elise/Exige Coolant Expansion Tank OEM Location Kit

Radium - Elise/Exige Coolant Expansion Tank OEM Location Kit

SKU: 20-0270-01
Regular price $417.00
/
  • In stock, ready to ship
  • Inventory on the way

Click here to download installation instructions (PDF)

This kit is compatible with all S2 Elise and Exige models that use the Toyota 2ZZ-GE engine (N/A or supercharged).

The Radium Coolant Expansion Swirl Tank features three ports that use -6AN male adapters (not tapered pipe threads) for a positive seal. The main tank is a 2-piece design constructed of billet aluminum.

The two halves are bolted together along with a CNC billet aluminum cap receiver which mates to any standard 32mm "Type-A" style pressure cap.

The Radium Engineering tank also has a swirl feature as shown. Pressurized coolant 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.


The S2 Lotus Elise Lotus Exige and Lotus 2-Eleven comes standard with a Denso coolant expansion tank. This is the same plastic tank that is found in the Toyota 2ZZ-GE equipped vehicles. For fitment Lotus designed a complex bracket that incorporates a mount for the electric hot-soak water pump. There has been cases reported where the Denso tank has failed and owners have found that new replacements are quite expensive. Radium has simplied the Lotus design by making two separate mounts and further improved it using a robust aluminum tank and adapting the factory hoses to -6AN fittings.

The picture below shows the factory Lotus setup (left) and the Radium setup (right).

The mount uses all factory threaded mounted holes. Because of this there is no need to drill or modify anything as it bolts in. Install is a fairly simple process that can be performed by an average mechanic. Everything is accessible with the rear clam intact. Aluminum push lok-hose ends are included to convert the factory coolant hoses into -6AN.

Includes:

-Billet Aluminum Coolant Tank Anodized Black
-Nickel Plated Sight Tube Fittings
-Aluminum 6AN Male Adapter Fittings Anodized Black
-Aluminum 6AN Hose Ends Anodized Black
-Laser Cut Aluminum Tank Bracket Powder Coated Black
-Laser Cut Aluminum Hot-Soak Water Pump Bracket Anodized
-Rubber Isolation Coolant Tank Grommets
-Hot-Soak Water Pump Cushion Clamp
-Mounting Hardware

Options:

The optional Radium Engineering pressure caps (sold separately) allow the user to select a range of pressure that was not possible with the Denso tank. The purpose of a high pressure cap is to increase the boiling point in the cooling system providing improved cooling efficiency. Each cap is manufactured from stainless steel with a race proven high pressure valve. This is something to consider when tracking the vehicle in extreme conditions.

Note: The OEM Lotus pressure cap is 1.1Bar.

"

Small items: 1-3 Days via Express Post Satchel

Medium Sized Items: 2-3 working days via AusPost Express or Courier (Depending on location)

Large Items: 2-8 working days (Large items can only be sent via courier, and delivery time depends on both courier and location

*Delivery to rural or remote areas, NT, WA, and TAS may take longer*

Click here to download installation instructions (PDF)

This kit is compatible with all S2 Elise and Exige models that use the Toyota 2ZZ-GE engine (N/A or supercharged).

The Radium Coolant Expansion Swirl Tank features three ports that use -6AN male adapters (not tapered pipe threads) for a positive seal. The main tank is a 2-piece design constructed of billet aluminum.

The two halves are bolted together along with a CNC billet aluminum cap receiver which mates to any standard 32mm "Type-A" style pressure cap.

The Radium Engineering tank also has a swirl feature as shown. Pressurized coolant 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.


The S2 Lotus Elise Lotus Exige and Lotus 2-Eleven comes standard with a Denso coolant expansion tank. This is the same plastic tank that is found in the Toyota 2ZZ-GE equipped vehicles. For fitment Lotus designed a complex bracket that incorporates a mount for the electric hot-soak water pump. There has been cases reported where the Denso tank has failed and owners have found that new replacements are quite expensive. Radium has simplied the Lotus design by making two separate mounts and further improved it using a robust aluminum tank and adapting the factory hoses to -6AN fittings.

The picture below shows the factory Lotus setup (left) and the Radium setup (right).

The mount uses all factory threaded mounted holes. Because of this there is no need to drill or modify anything as it bolts in. Install is a fairly simple process that can be performed by an average mechanic. Everything is accessible with the rear clam intact. Aluminum push lok-hose ends are included to convert the factory coolant hoses into -6AN.

Includes:

-Billet Aluminum Coolant Tank Anodized Black
-Nickel Plated Sight Tube Fittings
-Aluminum 6AN Male Adapter Fittings Anodized Black
-Aluminum 6AN Hose Ends Anodized Black
-Laser Cut Aluminum Tank Bracket Powder Coated Black
-Laser Cut Aluminum Hot-Soak Water Pump Bracket Anodized
-Rubber Isolation Coolant Tank Grommets
-Hot-Soak Water Pump Cushion Clamp
-Mounting Hardware

Options:

The optional Radium Engineering pressure caps (sold separately) allow the user to select a range of pressure that was not possible with the Denso tank. The purpose of a high pressure cap is to increase the boiling point in the cooling system providing improved cooling efficiency. Each cap is manufactured from stainless steel with a race proven high pressure valve. This is something to consider when tracking the vehicle in extreme conditions.

Note: The OEM Lotus pressure cap is 1.1Bar.

"

Evolution Racing Spares aims to have fast turnaround time for processing and handling orders, and will always make every effort to get the order to you as soon as possible.

Small items: 1-3 Days via Express Post Satchel
Medium Sized Items: 2-3 working days via AusPost Express or Courier (Depending on location)

Large Items: 2-8 working days (Large items can only be sent via courier, and delivery time depends on both courier and location

- Delivery to rural or remote areas, NT, WA, and TAS may take longer.

- Express Post shipping is only valid to areas that fall within the express post zone and is not guaranteed.

- Evolution Racing Spares may use the quickest carrier/method for delivery regardless of the method chosen at checkout.

- Typical handling time for items that are in stock is approximately 24-48 hours, with delays during holiday periods and public holidays.

- Evolution Racing Spares is not responsible for lost or damaged orders when customers change the delivery instructions to "authority to leave."

All goods sold and work performed by Evolution Racing Spares come with a 3-month warranty with no questions asked.

In accordance with the Australian Consumer Law, we are not required to provide a refund or replacement if you change your mind.

You can choose a refund or exchange if an item has a major problem, including:

  • A problem that would have stopped you from buying the item if you had known about it
  • The item is unsafe
  • The item is significantly different from the sample or description
  • The item doesn't do what we said it would, or what you asked for and can't be easily fixed

Alternatively, you can choose to keep the item and we will compensate you for any drop in value.

  • If the problem is not major, we will repair the item within a reasonable time.
  • If the item is not repaired in a reasonable time, you can choose a refund or replacement.

Please keep your proof of purchase such as your receipt.

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