1 Qt Expansion Tank

The 1 Qt Expansion Tank by MOROSO (MPN 63656) is a precision-engineered coolant recovery system designed for high-performance engines and custom cooling applications. This aluminum expansion tank serves as a critical component in modern cooling circuits, capturing and storing excess coolant that naturally expands as engine temperature rises. Whether you're building a race engine, restoring a classic vehicle, or upgrading a street machine, this compact 1-quart tank provides reliable overflow management and coolant level monitoring without compromising under-hood aesthetics.

Constructed from lightweight aluminum with a natural finish, the 1 Qt Expansion Tank features a 1/4 inch NPT female inlet connection for coolant return flow and a 1/2 inch NPT female outlet for circulation back to the radiator or engine block. The dual NPT port configuration ensures secure, leak-free connections with standard plumbing fittings and adapters. Its compact footprint—measuring 8.5 x 5 x 8.5 inches and weighing just 1.43 pounds—makes it easy to integrate into tight engine bays while maintaining visibility for quick coolant level checks. The natural aluminum construction resists corrosion and integrates seamlessly with both traditional and modern cooling systems.

This universal-fit tank benefits engine builders, hot rodders, and performance enthusiasts who demand reliability and precision in their cooling systems. Installation requires basic plumbing connections—simply route the inlet line from the engine's overflow port and the outlet back to the radiator or block. The 1-quart capacity suits most street and race applications where space is limited or where a smaller reserve is preferred. Compatible with all coolant types and both standard and custom radiator setups, the MOROSO expansion tank eliminates guesswork in coolant management and helps prevent air locks, overheating, and coolant loss during high-RPM operation.