Pro Alloy Aluminum Coolant Expansion Tank for Lotus Elise, Exige, and 2-Eleven
The coolant expansion tank developed and manufactured by Pro Alloy replaces the standard plastic tank with a robust aluminum construction. With a total volume of 1,700 ml, it offers nearly double the volume of the original tank with 900 ml.
The handcrafted and precisely TIG-welded design is built for long durability. The black powder coating in Pro-Black finish protects the surface and provides a discreet look in the engine bay.
Direct replacement for the original tank: The standard mounting points and hoses are reused. No modifications are required.
Advantages over the standard tank
Plastic expansion tanks can become brittle over time due to repeated temperature and pressure changes. Sun exposure in the engine bay can further accelerate this aging.
The aluminum construction offers a durable alternative. The larger container volume creates additional coolant and expansion reserves – especially for vehicles used on track days and racing circuits as well as in high outside temperatures.
Suitable for
Lotus Elise S2 with 1ZZ engine, 2006 to 2010
Lotus Elise S2 with 2ZZ engine, 2004 to 2011
Lotus Exige S2 with 2ZZ engine
Lotus Elise S3 1.6, 2011 to 2014
Lotus Elise S3, 2011 to 2021
Lotus 2-Eleven
Product details
Manufacturer: Pro Alloy
Made entirely of aluminum
Handcrafted, TIG-welded construction
Total volume: 1,700 ml
Volume of the standard container: 900 ml
Internal guide plates to support air separation
Filling neck made of solid aluminum
Integrated sight glass for easy level monitoring
Manual vent valve
Black powder coating in Pro-Black finish
Mounting at the original attachment points
Use of the standard hoses
Delivery including cap
Scope of delivery
1 × Pro Alloy aluminum coolant expansion tank in Pro-Black finish
Matching cap
Important installation note
Installation is possible without modifications to the vehicle. According to the manufacturer, installation can be done by an experienced hobby mechanic in less than 30 minutes.
Work on the cooling system may only be carried out when the engine is cool. After installation, the cooling system must be properly bled and all connections checked for tightness.