Expansion tanks for trucks

Expansion Tanks for Trucks

A truck's expansion tank is an important component of the engine cooling system. The tank accommodates the expansion of the coolant as the engine heats up and ensures that the cooling system continues to operate at the correct pressure. The expansion tank also makes it easy to check and top up the coolant level. A properly functioning expansion tank helps prevent overheating and contributes to reliable engine operation.

At BAS Parts & Tyres, you'll find an extensive range of expansion tanks and related components for trucks of various makes and models. From complete expansion reservoirs and radiator caps to level sensors, connections, and mounting hardware.

What Does an Expansion Tank Do?

Coolant expands as it heats up. The expansion tank accommodates this change in volume, keeping the pressure in the cooling system stable. When the engine cools down, the coolant flows from the expansion tank back into the cooling system.

Accommodating Expanding Coolant

The expansion tank prevents excess coolant from being lost when the pressure in the cooling system increases. This helps the system continue to operate efficiently.

Checking the Coolant Level

Thanks to the transparent housing or level markings, it is easy to check whether the coolant level is still within the specified range.

Part of a Closed Cooling System

The expansion tank works together with the radiator, water pump, thermostat, and radiator cap to keep the cooling system closed and at the correct pressure.

Which Components Are Associated with an Expansion Tank?

Depending on the truck model, the expansion tank may consist of several parts or be fitted with additional components.

• Expansion tank or expansion reservoir.
• Radiator cap or expansion tank cap.
• Coolant level sensor.
• Hose connections.
• Bleed connections.
• Mounting brackets and rubber supports.
• Seals and gaskets.

Why Is a Properly Functioning Expansion Tank Important?

A properly functioning expansion tank prevents pressure problems and coolant loss. This keeps the engine at the correct operating temperature and significantly reduces the risk of overheating.

• Accommodates changes in pressure and volume.
• Prevents coolant loss.
• Helps prevent overheating.
• Supports stable coolant circulation.
• Extends the service life of the cooling system.

Symptoms of a Faulty Expansion Tank

Problems with the expansion tank can cause the cooling system to function poorly. Common symptoms include:

• Coolant leaks around the expansion tank.
• Cracks in the plastic tank.
• A continuously dropping coolant level.
• Engine overheating.
• A faulty or leaking radiator cap.
• A low coolant level warning.
• Air bubbles in the cooling system.
• Discoloration or ageing of the expansion tank.

Common Causes of Failure

Ageing Plastic

Prolonged exposure to heat and pressure can cause the plastic expansion tank to become brittle and eventually crack.

Faulty Radiator Cap

If the radiator cap does not regulate the system pressure correctly, excessive pressure can develop and damage the expansion tank.

Coolant Leaks

Worn hoses, connections, or seals can cause leaks, lowering the coolant level and allowing air to enter the system.

Overheating

A malfunctioning thermostat, water pump, or radiator can increase the pressure in the cooling system and place additional strain on the expansion tank.

Choosing the Right Expansion Tank

Expansion tanks differ in capacity, shape, connections, sensors, and mounting points. Therefore, always check the OEM number, part number, or chassis number before ordering a new expansion tank.

BAS Parts & Tyres supplies expansion tanks for brands including:

• DAF
• IVECO
• MAN
• Mercedes-Benz
• Renault Trucks
• Scania
• Volvo Trucks

New and Used Expansion Tanks

New Expansion Tanks

New expansion tanks offer maximum reliability, a long service life, and a perfect fit in accordance with the manufacturer's specifications.

Used Expansion Tanks

A used original expansion tank can be a cost-effective alternative, provided it is free from cracks, leaks, and damaged connections.

Order Expansion Tanks at BAS Parts & Tyres

BAS Parts & Tyres offers a wide range of expansion tanks and components for truck cooling systems. Simply search by OEM number, part number, or chassis number to quickly find the right expansion tank for your truck. This keeps the cooling system operating optimally and reduces the risk of overheating and engine damage.