International ProStar Coolant Reservoirs

Frequently Asked Questions About International ProStar Coolant Reservoirs

What does the coolant reservoir do on my International ProStar?

The coolant reservoir, also called the surge tank or overflow tank, holds extra coolant and allows air and vapor to escape from the cooling system. It maintains proper coolant level and system pressure, helping prevent overheating and air pockets that can damage your engine.

How do I know if my coolant reservoir needs to be replaced?

Common signs include visible cracks or stress lines in the plastic, coolant leaking from the tank itself, a reservoir that will not hold pressure or cap seal properly, discolored or heavily degraded plastic from heat exposure, or a low coolant warning even after topping off the system. If you notice any of these issues, inspecting or replacing the reservoir is a good next step.

Will a replacement reservoir fit my specific ProStar model year?

International made changes to the coolant reservoir design and mounting configuration across different ProStar production years. Always check the listed fitment details on each product page and compare against your truck's VIN or existing part number before ordering to make sure you get the correct tank, cap, and sensor configuration for your specific build.

Are these reservoirs made from OEM-quality plastic, and will they hold up to heat and pressure?

The reservoirs we carry are built to handle the heat and pressure conditions found in a working cooling system. Materials and construction can vary between manufacturers, so check the product description for details on material type and any included caps, sensors, or mounting hardware before purchasing.

Do these reservoirs come with the cap, sensor, or mounting hardware included?

This varies by listing. Some coolant reservoirs are sold as a bare tank only, while others include the cap, low coolant level sensor, or mounting brackets. Review the product description and included components list carefully, and reuse your old hardware if a listing does not include everything you need.