When it comes to the heating and cooling systems in any vehicle, there are a number of critical components. One of which is the coolant overflow tank. But what is this? And what are the most common coolant overflow tank problems in vehicles?
What does the coolant overflow tank do?
The coolant overflow tank is also known as the coolant reservoir. This plays an essential role in maintaining the proper level of coolant in the engine, managing the expansion and contraction of coolant as it heats and cools during the normal engine operation. As the coolant circulates through the engine and radiator to absorb and dissipate heat, it itself will heat up, causing the coolant to expand. This is where the overflow tank comes into play. The excess coolant will be directed into the overflow tank. When the engine cools down, the coolant contracts, creating a vacuum that draws the coolant back into the engine from the overflow tank. This system ensures that the engine always has the correct amount of coolant available for proper functioning, preventing overheating and helping to maintain optimal performance.
What are the most common problems with the coolant overflow tank?
There are a number of different problems that are associated with the coolant overflow tank. These can cause various issues with the performance of the vehicle, as well as structural problems, including:
- Leaks- One of the most common problems is a leak in the overflow tank. This can occur due to cracks or damage caused by age, heat, or physical impact. A leaking overflow tank can lead to a loss of coolant, resulting in the engine overheating.
- Cracks and ageing- Over time, the plastic material of the overflow tank can become brittle and crack due to continuous exposure to heat cycles and the chemical properties of the coolant. This is especially prevalent in older vehicles or those that have experienced prolonged exposure to extreme temperatures.
- Blocked hoses- The hoses connecting the overflow tank to the radiator and engine can become clogged with debris or degraded material. This blockage can prevent the proper flow of coolant between the tank and the engine, leading to overheating issues.
- Faulty cap- The cap of the overflow tank is designed to maintain the correct pressure in the cooling system. If the cap is faulty, it can fail to seal properly, allowing coolant to escape or preventing the coolant from being drawn back into the engine, both of which can cause overheating.
- Coolant quality- Poor-quality or contaminated coolant can lead to sediment build-up in the overflow tank and hoses, obstructing the flow of coolant. Regularly checking and replacing the coolant can help prevent this issue.
What are the benefits of professional repair for coolant overflow tanks?
For the coolant overflow tank it is essential to choose a professional team with the expertise and experience to resolve the issue effectively and quickly, like us here at MRS. The benefits of professional repair include:
- Expert diagnosis- Our team of trusted professionals have the tools and expertise to accurately diagnose the cause of the problem. Whether it’s a leak, a faulty cap, or a clogged hose, we can pinpoint the exact issue and recommend the best course of action.
- Quality parts- You can trust our team to use the highest quality parts for repairs that withstand the test of time.
- Comprehensive service- Our team will deliver a professional and thorough service, not only repairing the overflow tank as needed, we will perform a comprehensive inspection of the entire cooling system. This can help identify and address any other potential issues, such as problems with the radiator, water pump, or thermostat.
Here at MRS Heat Transfer we are radiator, car heater, intercooler, and air conditioning experts, and we have the skills, knowledge and expertise to resolve any air conditioning or car heater problem. Why not get in touch today to find out more?