EVIL ENERGY Aluminium Coolant Overflow Tank 1L Black - TIG-welded, Universal Fit, Leak-Resistant

EVIL ENERGY's 1L aluminum coolant overflow tank is a compact, TIG-welded radiator reservoir designed to replace or upgrade stock expansion tanks on most vehicles.

This lightweight 1-liter reservoir gives you a durable, leak-resistant alternative to brittle plastic overflow bottles. Machined from aluminum, fitted with a sealed pressure cap and O-ring equipped barb fittings, this universal tank is built to handle the pressure path between radiator and reservoir while occupying minimal under-hood space. It’s a straightforward upgrade for hobbyists, tuners, and anyone replacing a cracked or discolored OEM plastic bottle.

How does this overflow tank work in my cooling system?

The tank collects excess coolant that the radiator releases when pressure rises above the cap setting, then supplies coolant back when the system cools. Ports are arranged so the bottom port connects to the radiator overflow line while the top port vents or returns coolant as designed.

• 1L storage volume for coolant expansion and recovery.
• Bottom port designated as radiator overflow connection.
• Top port acts as the tank overflow/vent path.
• Compatible with systems using a pressurized radiator cap.

What are the key build and sealing features?

The EVIL ENERGY tank is fully TIG welded for structural integrity, with threaded fittings that include O-ring gaskets to improve sealing. A tightly closing cap and supplied barb fittings minimize the chance of coolant loss under normal operating pressures.

• TIG-welded aluminum body for durability and corrosion resistance.
• M14 x 1.5 male thread with O-ring gasket on fittings.
• Barb fittings suit 3/8" ID hoses (compatible with included fittings).
• Recommended use of Teflon tape to enhance airtight installation.

Will this fit my vehicle and how do I install it?

The reservoir is designed as a universal replacement but requires you to verify available space and hose routing before installation. Installation is simple: connect the radiator overflow hose to the bottom barb, secure fittings with clamps, and use the included O-rings and recommended Teflon tape to ensure leak-free joints.

• Universal fitment—measure your engine bay to confirm clearance.
• Use 3/8" ID coolant hose on the M14*1.5 barb thread.
• Barb fittings and drain plug include O-rings for sealing.
• Tighten threaded cap fully and check for leaks after filling.

Who is this for? This EVIL ENERGY aluminum coolant overflow tank is aimed at car owners replacing failed OEM plastic reservoirs, performance enthusiasts seeking a robust upgrade, and mechanics needing a compact, serviceable expansion tank for custom or swapped engines. If you value a metal reservoir that resists heat-related aging and offers straightforward installation with standard hoses and fittings, this 1L unit is a practical choice. Always measure mounting space and confirm hose compatibility before purchase and follow vehicle-specific cooling system guidelines during installation.