YEYETUO Coolant Overflow Tank 800ml Aluminum Radiator Reservoir — Black, O-Ring Sealed

YEYETUO's 800ml aluminum coolant overflow tank is a compact, leak-resistant radiator reservoir built to manage excess coolant and improve cooling-system reliability.

This compact 800ml radiator overflow tank from YEYETUO replaces or upgrades factory plastic bottles with a durable aluminum reservoir engineered for better heat dissipation and long-term use. It arrives with all mounting hardware and hose fittings so you can fit it to most passenger cars quickly. The tank’s black finish and clean lines also provide a subtle visual upgrade under the hood while protecting coolant levels during normal operation and temperature cycles.

How does this overflow tank help my car’s cooling system?

The YEYETUO overflow tank captures expanding coolant and returns it to the radiator as the engine cools, helping maintain stable fluid levels and preventing air pockets. Its aluminum construction helps shed heat faster than plastic, which can reduce the chance of warped or weakened reservoir material under heavy use.

• 800ml capacity for typical passenger car recovery needs
• Aluminum body improves heat dissipation compared with plastic
• O-ring sealed cap reduces the risk of coolant leakage
• Includes hose and clamps for simple plumbing to the radiator

Is installation difficult and what’s included in the kit?

Installation is straightforward for anyone comfortable working under the hood; the kit is designed for universal fitment and uses standard hose diameters. YEYETUO supplies mounting brackets, clamps, screws, a fuel-line style hose, and a cap clamp so you won’t need extra parts in most installs.

• Package includes 1 overflow tank, hose, cap clamp, 2 brackets, 2 clamps, 2 screws
• Hose ID matches common radiator fittings for easy connection
• Mounting brackets accommodate a range of engine-bay orientations

What are the exact dimensions and how do they affect fit?

The tank’s footprint and inlet/outlet sizes are provided so you can confirm fitment before purchase. Its compact length and moderate diameter allow it to fit in tight engine bays while the 1.96-inch hose ID pairs with common radiator overflow lines.

• Length: 7.48 inches — fits many compact and mid-size engine bays
• Bottom diameter: 2.95 inches for a small engine-bay footprint
• Cap diameter: 1.96 inches and hose ID: 1.96 inches for standard hoses
• Volume: 800ml — suitable for typical passenger vehicles

How durable and leak-resistant is the tank over time?

The tank uses an O-ring sealed cap and aluminum construction to resist cracking, swelling, and degradation that can affect plastic reservoirs. Properly mounted and secured with the included clamps, it provides a durable alternative designed to tolerate thermal cycling and everyday vibration.

• O-ring seal helps prevent coolant seepage at the cap
• Aluminum body resists heat-related deformation seen in plastics
• Black coating improves corrosion resistance and appearance

Who is this for? This YEYETUO 800ml coolant overflow tank is aimed at drivers who want a rugged, compact replacement for a worn or leaking factory reservoir, DIY mechanics updating cooling components, and vehicle owners seeking a subtle engine-bay upgrade. It’s especially useful for those with limited space who need a reliable recovery tank that installs with basic hand tools and includes the fittings required for most standard radiator connections.