Volvo VNL Truck Coolant Tank Reservoirs

Coolant is added directly into the surge/overflow reservoir tank, which stores excess coolant as it expands with heat and releases it back into the radiator as the engine cools. Fill to the appropriate level indicated on the tank, ensuring the OEM cap and low-coolant sensor (if equipped) are properly seated afterward. For exact fill procedures and capacities for your Volvo VNL model year, consult your service manual or reach out to our team.

The coolant tank reservoir, also called a surge or overflow tank, stores excess coolant as it expands with heat and releases it back into the radiator as the engine cools. It maintains proper coolant levels and system pressure, preventing air pockets and overheating in Volvo VNL diesel engines.

Yes, our reservoir tanks are manufactured to OEM specifications for fit, form, and function, ensuring they install and perform like the original Volvo VNL component without modification to hoses, brackets, or sensors.

Common signs include visible cracks, coolant leaks around the tank, low coolant warnings despite topping off, discoloration from UV exposure, or a brittle cap seal. Inspect the tank regularly for stress cracks near mounting points and fittings.

Most heavy-duty truck coolant reservoirs are molded from high-density polyethylene (HDPE) or reinforced nylon composite, chosen for resistance to heat, pressure, and coolant chemicals while remaining lightweight and impact resistant.

Fitment varies by SKU; most reservoirs come with mounting provisions for the OEM cap and low-coolant level sensor. Confirm the exact configuration for your Volvo VNL model year when placing your order.

Reservoir tank pricing ranges from approximately $311 to $1,916 depending on the truck model, tank capacity, and manufacturer specifications. Contact our team for an exact quote based on your Volvo VNL's model year and configuration.