Radium Coolant Expansion Tank OEM location - Elise/Exige 06-11 (2ZZ-GE)

Radium Coolant Expansion Tank OEM location - Elise/Exige 06-11 (2ZZ-GE)

Application: Lotus S2 Elise / Exige – Toyota 2ZZ-GE (naturally aspirated and supercharged)
Part Type: Billet coolant expansion swirl tank kit, OEM location
Part Number: 20-0270-01

The Radium OEM Location Coolant Tank Kit replaces the Denso plastic expansion tank fitted to Lotus 2ZZ-GE Elise and Exige models, which has failed in some cases. The billet aluminium tank features an internal swirl chamber that spins pressurised coolant in a vortex to help de-aerate the system.

The kit uses two separate mounts and factory threaded holes, so no drilling is required, and Radium notes an average mechanic can install it with the rear clam in place. Factory hoses are adapted to 6AN with the included fittings.

Key Features

• OEM Location: Replaces the factory plastic expansion tank
• Swirl Deaeration: Internal vortex chamber removes entrained air
• Billet Construction: Two-piece billet aluminium tank with CNC cap receiver
• No Drilling: Uses factory threaded holes and two separate mounts
• 6AN Plumbing: 6AN male adapters for a positive seal – no tapered pipe threads
• Sight Tube: Nickel-plated sight tube fittings

What's Included

• Billet aluminium coolant tank, black anodised
• Nickel-plated sight tube fittings
• Aluminium 6AN male adapter fittings, black anodised
• Aluminium 6AN hose ends, black anodised
• Laser-cut aluminium tank bracket, black powder coated
• Laser-cut aluminium hot-soak water pump bracket, anodised
• Rubber isolation tank grommets
• Hot-soak water pump cushion clamp
• Mounting hardware

Optional Parts

• Radium Engineering Radiator Cap Type A Black (18-0076-A11 / A13 / A15) – 32mm Type-A pressure cap in 1.1, 1.3 or 1.5 bar

Important Notes

• Pressure cap is not included – the tank accepts a standard 32mm Type-A pressure cap
• The OEM Lotus cap is rated at 1.1 bar; a Radium high-pressure cap can be considered for extreme track use
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Lotus S2 Elise – Toyota 2ZZ-GE (N/A and supercharged)
• Lotus S2 Exige – Toyota 2ZZ-GE (N/A and supercharged)

Not sure if this suits your vehicle? Email sales@coore.com.au and our team will confirm fitment.