Genuine radiator water reservoir (expansion tank) for JAC GS3 / GS4 / GS5 / GA4

Product description:

This component, known as the radiator coolant expansion tank , is a reinforced plastic container essential to the cooling system of JAC GS3, GS4, GS5, and GA4 vehicles. Its primary function is to manage the fluctuating coolant volume within the system. When the engine heats up, the coolant expands, and the tank receives this excess. As the engine cools, the tank draws the coolant back into the radiator, keeping the system completely sealed and free of air gaps . The tank also helps regulate cooling pressure via its cap.

Benefits and features:

• Regulating thermal expansion: Prevents damage to the radiator and hoses by accommodating changes in fluid volume resulting from cooling and heating cycles.
• Maintaining system pressure: The reservoir cap is designed to maintain the operating pressure specified by the factory, raising the boiling point of the coolant and preventing overheating.
• Easy level monitoring: Provides a clear point for monitoring the coolant level (MIN/MAX) to facilitate routine maintenance.
• Preventing air ingress: Keeps the system closed and airtight, preventing air from entering which reduces cooling efficiency and causes rust.

Specifications:

• Part Name: Radiator Water Tank / Expansion Tank.
• Vehicle model: JAC GS3 / GS4 / GS5 / GA4.
• Compatible models: (vary by model, but usually includes 2018 and later models).
• The side: It is fixed in the engine compartment.
• Condition: New.
• Type: Original.

If you notice a continuous decrease in coolant, or the presence of cracks, or discoloration of the plastic (yellowing and brittleness) in the old reservoir, this indicates damage to the reservoir and the possibility of leakage of coolant vapor, leading to a continuous shortage of water, and it should be replaced immediately.

⚠️ Important Notice: Please make sure the part matches your vehicle's chassis number before purchasing the product or after ordering.