Kenworth T680 Coolant Reservoir Tanks

The coolant reservoir tank, also called a surge or overflow tank, is a plastic container connected to the radiator that collects excess coolant as it expands with heat and returns it to the cooling system as the engine cools, preventing air pockets and maintaining consistent coolant levels.

Kenworth T680 trucks typically require an extended life coolant (ELC) meeting PACCAR MX or Cummins engine specifications, usually a fully formulated ethylene glycol coolant rated for heavy-duty diesel applications. Always confirm the exact specification listed in your truck's owner manual before topping off or replacing coolant.

Yes, our Kenworth-compatible reservoir tanks are manufactured to match OEM fit, form, and function, allowing for direct bolt-on installation without modification. Each tank is cross-referenced against Kenworth part numbers to ensure proper mounting points, hose connections, and cap threading for a reliable seal.

Common signs include visible cracks or discoloration in the plastic, coolant leaks or residue around the tank, frequent low coolant warnings, a damaged or non-sealing cap, or recurring engine overheating despite proper coolant levels. Inspecting the tank during routine maintenance helps catch these issues early.

These tanks are typically molded from durable, heat-resistant polypropylene or similar engineered plastic designed to withstand engine bay temperatures, pressure cycling, and road vibration. The translucent construction also allows drivers and technicians to visually monitor coolant levels without removing the cap.

Yes, we ship coolant reservoir tanks and other cooling system components across the United States. Contact our team for specific delivery timelines, freight options for larger orders, and any applicable return or warranty information for your Kenworth T680 tank purchase.