Product Description
This 2-piece engine radiator coolant reservoir tank set features a direct replacement design that supports optimal coolant overflow management and helps maintain stable engine temperatures. Each tank includes a yellow coolant reservoir cap, closely replicating OEM# 21712-79900 specifications for reliable compatibility and performance.

Crafted from durable, heat-resistant plastic, the tanks are built to endure high operating temperatures, resist deformation under pressure, and ensure long-lasting functionality. The high-strength material construction provides a leak-resistant structure, ideal for vehicle cooling systems that demand consistent pressure control.

This product is designed for vehicles equipped with an external coolant reservoir system and is used to replace worn or cracked expansion bottles. It helps prevent coolant loss due to overflow, maintaining the correct fluid level in the system during engine operation. The snap-on cap with precision fit ensures secure sealing and easy removal when needed.

Each tank measures approximately 1.5 x 1.5 inches (outer diameter), with an inner diameter of 1.2 x 1.2 inches and a height of 0.43 inches. The compact size allows seamless integration into tight engine bays while maintaining original system performance.

Compatible with cooling systems that require an external tank and top-mounted cap matching OEM part number 21712-79900, this set provides a cost-effective solution for radiator maintenance. It is recommended to verify the part number and dimensions before purchase to ensure a proper fit.

Whether you're replacing a damaged tank or performing scheduled maintenance, this coolant overflow tank set offers dependable performance and straightforward installation, helping to extend the life of your engine cooling system.