20-0270-01 Coolant Tank Lotus Elise/Exige 2ZZ-GE OEM Location

COMPATIBILITY
Lotus S2 Elise (N/A Toyota 2ZZ-GE)
Lotus S2 Elise (Supercharged Toyota 2ZZ-GE)
Lotus S2 Exige (N/A Toyota 2ZZ-GE)
Lotus S2 Exige (Supercharged Toyota 2ZZ-GE)

OVERVIEW
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 de-aerating 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 simplified 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 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 Pushlok hose ends are included to convert the factory coolant hoses into 6AN.

PRESSURE CAP
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.

INCLUDED
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
Optional Radium pressure cap is not included in this kit


Returns & Exchanges


Please inspect items immediately when received.  Read conditions below carefully before inquiring about returns and exchanges.

  • All returns are subject to a 20% restocking fee.  The restocking fee covers the cost of our order processing, shipping cost, and the restocking process.
  • Items you wish to return MUST be approved prior to your return.  Contact us for an RMA# (Return Merchandise Authorization) and specify your reason for return.  All return inquiries must be sent to us within 5 days of receiving your order.
  • Approved Returns MUST be sent back to us within eBay's 30 days of receiving your RMA#
  • Returned items must be in brand new condition.
  • Shipping, handling, and transaction fees are non-refundable.
  • Once items have been returned to us, and the condition has been inspected and approved, a refund will be issued.  Approved refunds are issued within 2-3 days.
  • If a mistake was made by us, we will provide a return shipping label for you to use to make the exchange as seamless as possible.

Order Status & Availability

  • We will contact you by eBay messages if an item you ordered is currently not available or back ordered.  We will obtain your approval if you wish to keep an item on backorder or if you wish to cancel your order. 
    If the item is coming back in stock within two weeks, we'll ask if you want to keep it on order.  If any longer, we will immediately refund you.  We ship back ordered items immediately when they become available.
  • We only shipped to verified addresses, if you wish to change an address, please do so on eBay or contact us if you need help. 
  • Please contact us if you wish to check the availability of an item prior to making an order.
  • I may ship using USPS, FedEx, or UPS.  Factors that include my selection is the best time or carrier limitation to ship to you.  If you have a preference, I may consider it but please message me first.
  • For shipping to AK, HI, US Protectorates, please message us for a shipping quote to see if it's possible to offer you free or discounted shipping rate.
Warranty
  • All warranty is handled through manufacture.  If you need help contacting the manufacturer, contact us and we will provide you with the contact information and will help you gather any necessary information to streamline any issues with you.
*All items (except those exempted) are intended for off-road use only, may never be used on public roads and highways.*