Today is your lucky day if your car is heating up. I will show you how to fix it. There are not many things that can cause your car to really heat up. Let’s start with the basics. When the radiator fluid is cold, check it. Remove the radiator cap. Take a look inside. In this instance, it’s probably bone dry, so pressure tests the system for any leaks. Don’t worry, if you don’t want to do it yourself, you can still buy the used items for $30, and some of them only cost $70.
Hook it up to your radiator. Pump up the pressure. This case shows that the pressure is leaking from the radiator. The radiator is full of holes. This case is now fairly straightforward. The radiator had a hole, but it wasn’t difficult to access. Watch the pressure gauge to see if it begins to drop. If it does, you can pump it up to 16 pounds pressure or more and then watch the gauge. If it drops like this, you know there is a leak. Let’s suppose your pressure was tested and found no leaks. What should you do? It would help if you remembered that radiator caps are meant to keep pressure in place. If they are worn or rusty, you may need to replace them. Some machines can test radiator caps. But they are so inexpensive; you can buy another one and put it on. If that fails to fix the problem, you can check the cooling fan. Turn the AC up to full blast, start the car and check the cooling fan to make sure they are working again. In this example, the left fan is spinning, and the right one is. The fans won’t work if there isn’t enough air. Overheating radiators can cause them to stop working. You can check if they have burned out by checking the fan motors. You can use a jumper wire to attach one hand to the positive end of the battery. Let’s inspect the other end of the red cable that supplies the motor. If the fan stops spinning, the motor has likely failed. However, if the fan does not spin, the fans may be working properly. The problem could be a bad thermostat. These thermostats must be closed when the engine heats up. When it gets hot, they are supposed to open and sometimes stick. Most thermostats are easy to access. Follow the bottom radiator line to find the thermostat housing. There is a bolt at the top and bottom. It is easy to remove it and replace the thermostat. If it doesn’t, then it could be one of two very expensive problems. Either the radiator is too old to dissipate heat anymore, the head gasket is leaking, or the engine is causing problems. Modern radiators made from aluminum and plastic often corrode and don’t dissipate heat anymore. It is best to hope that the radiator works because a bad headgasket can cause the engine to fail. This can lead you to have the engine disassembled, which can run well into the thousands on modern cars. To ensure that the head gasket is not leaking, you should perform a combustion leak test before turning off the engine. This is a quick test that involves putting blue liquid into a tube. The engine is then run to check if the blue turns brown. This is a sign that your head gasket has failed. If the blue liquid turns yellow, it’s okay to replace the gasket. Don’t panic if your car overheats. Get under the hood to fix it!