The Three Signs of a Problematic Mazda Protege Radiator Overflow Tank
Your Mazda Protege radiator overflow tank receives the expanded coolant that was released by the radiator due to extreme heat and pressure. Aside from that, it also prevents the radiator hoses and other cooling system parts from blowing up. Over time, the radiator overflow tank will wear down and may cause the coolant to leak or the engine to overheat. When you already notice that your car's cooling system is acting a weird, you should pop the hood and do some troubleshooting. Here are some of the problems you might encounter:
Decrease in engine coolant level
A crack in your Mazda Protege radiator overflow tank is one of the causes for the coolant to leak, and you will notice the level of coolant in the reservoir slowly decrease or a puddle of coolant under your car. Although there are different causes of a leaking coolant, it is easy to check if the problem is caused by the radiator overflow tank because you can simply look for the crack or the hole on its surface. To solve this issue, you can use plastic or epoxy welds to cover the crack of the overflow tank. However, if this doesn't work and the coolant is still leaking, then it's time for you to find a replacement radiator overflow tank.
Increasing engine temperature and overheating
Other symptoms of a faulty radiator overflow tank include the sudden increase in the engine temperature and overheating. Although there can be other causes for your car's engine temperature to increase or the engine to overheat, you should check the overflow tank because it can be a possible culprit. However, before you do this, you should let your vehicle cool down first to avoid any injury. When the car finally cools down, you should pop the hood and find holes or cracks on the tank's surface.
Bubbles inside the radiator overflow tank are actually a common occurrence because the tank's function is to remove these bubbles from the coolant in your car's cooling system. However, this could also be a sign of a leak at the head gasket. You can test each cylinder using a cylinder leakage tester and observe if there are bubbles present. If there's none, then the bubbles inside the radiator overflow tank are completely normal.