![]() This can cause the engine to overheat and reduce the coolant level in the reservoir. The thermostat is responsible for regulating the flow of coolant in the engine, and if it fails to open or close at the correct temperature, it can cause the coolant to be blocked or not flow properly. Faulty ThermostatĪ faulty thermostat can cause the engine to overheat, which in turn can cause the coolant reservoir to become empty. While changing the seal alone is a more economical option, replacing the seal and water pump simultaneously might be more cost-efficient if one is close to the recommended mileage for water pump service. Regular inspections of both the water pump and its seal are imperative to spot any signs of wear, such as cracks or hardening. Failing Water Pump SealĪ malfunctioning water pump seal can result in a depleted coolant supply and eventual engine overheating. However, replacing the radiator with a brand-new one is the most effective solution. The hole can be patched, and many repair shops offer this service at an affordable cost. It is crucial to identify a faulty radiator by inspecting the vehicle’s undercarriage and looking for the source of the leak.Ī small hole can cause the coolant to evaporate, and in such cases, it is advisable to remove the radiator and conduct a smoke test. Age-related degradation can cause coolant to seep through cracks and disappear. Blown Head GasketĪ breach in the radiator can also be the culprit behind a coolant leak, particularly if the radiator has been damaged in a collision or has become outdated. The following are some of the reasons you have an empty coolant reservoir: 1. If the coolant level drops below this line, it could indicate a problem with the cooling system, such as a leak or evaporation, which should be addressed promptly to prevent engine damage. The coolant reservoir also has a fill line, indicating the appropriate coolant level for optimal engine performance. This ensures that the radiator is always filled with the right amount of coolant and prevents it from overheating. Then, as the engine cools down, the coolant contracts and is drawn back into the radiator from the reservoir. The way it works is simple – as the engine heats up, the coolant expands and flows into the coolant reservoir. Its primary function is to provide a space for excess coolant to expand and contract as the engine heats up and cools down. What Is a Coolant Reservoir and How Does It Work?Ī coolant reservoir, also known as an overflow tank, is a small plastic or metal tank that is connected to the radiator of a car’s cooling system. To help you avoid any engine disasters, in this article, we’ll discuss what a coolant reservoir is, how it works, and what you should do if you notice an empty coolant reservoir. Some culprits include a leaking head gasket or block, a faulty radiator cap, or a damaged coolant reservoir hose. But what exactly causes an empty coolant reservoir? An overheated engine can be a nightmare for any driver, and an empty coolant reservoir is a sign that something might be amiss with your car’s cooling system.
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