EVIL ENERGY Aluminum Coolant Overflow Tank 800ml — Universal Black, O-ring Seal & Vent Cap

The EVIL ENERGY 800ml aluminum coolant overflow tank is a universal, compact radiator expansion bottle designed to collect excess coolant, resist heat, and reduce leaks in most vehicle engine bays.

Compact and engineered for durability, this 800ml radiator overflow bottle from EVIL ENERGY is made of aluminum alloy with a rubber hose and precision O-ring seal. It’s built to fit a wide range of cars where space allows, and includes a small ventilation hole in the cap to aid heat dissipation. The matte black finish gives a clean, unobtrusive look while the lightweight construction minimizes added weight under the hood.

How does this overflow tank prevent coolant leakage?

The EVIL ENERGY overflow tank uses an O-ring seal at the filler neck to create a tight, reliable closure that reduces the risk of coolant seepage. The threaded cap engages securely and the included hose fits snugly to the tank inlet, providing a controlled route for overflow coolant back to the engine system when required.

• O-ring seal at the cap to prevent drips and seepage.
• Tightly fitted rubber hose (5/16 inch ID) for secure connection.
• Durable aluminum alloy resists warping and maintains clamping pressure.
• Install vertically to maintain proper fluid flow and seal effectiveness.

Will this bottle fit my car and what are the exact dimensions?

This overflow bottle is considered universal and fits most vehicles as long as there is sufficient space in the engine bay for mounting. Before ordering, verify that the listed dimensions and hose size match your available clearance and existing plumbing.

• Volume: 800 ml (about 0.8 liters).
• Overall length: 7.48 inches; bottom diameter: 2.95 inches.
• Cap diameter: 1.96 inches; hose inner diameter: 5/16 inch.
• Requires vertical installation and clearance away from high-heat components.

What materials and features improve durability and cooling performance?

The tank body is constructed from aluminum alloy, offering lightweight strength and improved resistance to thermal cycling compared with many plastic tanks. The cap incorporates a small 1/16-inch ventilation hole to encourage heat dissipation, while the rubber hose and O-ring are chosen for chemical resistance to typical engine coolants.

• Aluminum alloy shell for corrosion resistance and structural rigidity.
• Rubber hose compatible with standard coolant formulations.
• 1/16-inch vent hole in cap helps release trapped heat and pressure.
• Included installation instructions and recommended vertical mounting orientation.

Who is this for? The EVIL ENERGY 800ml aluminum coolant overflow tank is aimed at DIY mechanics, car enthusiasts, and professional technicians who need a compact, reliable replacement or upgrade for OEM overflow bottles. It suits drivers with compact engine bays who want a sturdy, low-profile reservoir that resists heat and reduces leak risk. If you have limited space, want an aluminum replacement, and can mount the bottle vertically away from intense heat sources, this unit should meet your needs. Always confirm fit and clearance before purchase and follow the included installation guidance for best results.