![]() For this reason I recommend booking an appointment with one of our technicians to help you figure things out.PO Box, APO/FPO, Alaska/Hawaii, Albania, Algeria, Andorra, Angola, Argentina, Armenia, Azerbaijan Republic, Bahrain, Barbados, Belize, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, British Virgin Islands, Brunei Darussalam, Cambodia, Cameroon, Canada, Chile, China, Colombia, Cook Islands, Costa Rica, Dominican Republic, Ecuador, Egypt, El Salvador, Fiji, France, French Guiana, French Polynesia, Georgia, Germany, Ghana, Gibraltar, Greenland, Guadeloupe, Guam, Guatemala, Guernsey, Honduras, Hong Kong, Iceland, India, Indonesia, Jamaica, Jersey, Jordan, Kazakhstan, Kenya, Kuwait, Lebanon, Macedonia, Malawi, Maldives, Martinique, Mauritius, Mayotte, Moldova, Montenegro, Morocco, Mozambique, Namibia, New Caledonia, Nicaragua, Nigeria, Oman, Pakistan, Palau, Panama, Papua New Guinea, Peru, Puerto Rico, Qatar, Reunion, Russian Federation, Rwanda, Saint Lucia, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, Senegal, Serbia, Seychelles, Sri Lanka, Taiwan, Tanzania, Trinidad and Tobago, Tunisia, Turkey, US Protectorates, Uganda, Ukraine, Vanuatu, Venezuela, Virgin Islands (U.S. Determining a head gasket failure is best done by an experienced technician as there are many nuances that only experience will make apparent to you. Air bubbles can also be created from leaks and if a recently worked on system wasn’t properly filled. If this is the case, air bubbles will continually be created in the cooling system. The last possibility is a blown head gasket. If the first hose you choose doesn’t move much coolant, try another, but do not use either radiator hose. It is important to choose the hose that will flow plenty of coolant. However, when the cooler fails, motor oil can get into the cooling system. ![]() The purpose of the system is to cool down the oil to an acceptable level. Advanced systems are often found in high-performance or race cars. It should pump coolant out of it quickly. The oil/coolant heat exchanger is vital to keeping the temperature of the engine down. This is best done by removing a coolant hose, usually a heater hose and starting the car with the hose disconnected. If your radiator is good, you will need to check to see if the water pump is pumping. If there are cold spots, you have a clogged radiator that is best replaced. It should be hot at the top and gradually getting cooler toward the bottom. You first need the thermostat to be open, go for a quick drive around the block, come to a stop, turn the motor off, and feel the radiator with your hand. Testing for an internal clog is a little more involved. If it is clogged externally there will be debris lodged in the fins. The stat could be opening too late, in which case you will need an expensive infrared temperature gun to determine at what temperature it is opening.Īfter it is determined the thermostat is working properly, you will want to check to see if the radiator is clogged externally or internally. If it is hot to the touch, the stat is open and in most cases, the motor will not overheat because of the stat. This is the hose that comes from the thermostat housing. This is easily done by feeling the upper radiator hose. When a motor overheats, the place to begin is to determine if the thermostat is opening properly. Overfilling can create this as well, but it sounds as though your car is actually overheating. If the expansion tank is overflowing, then yes there is most likely a problem. If it is low and it has a leak, this needs to be fixed first. This should be done with the car cold and by filling through the radiator. All of this is the normal operation of a cooling system.įirst make sure the cooling system is completely full. In addition, the pressure increase in the cooling system is what keeps the coolant from boiling. It then allows coolant to be drawn back into the radiator from the expansion tank (overflow) when the system cools. The radiator cap is designed to allow coolant to pass into the overflow as pressure increases in your cooling system. The purpose of the overflow tank is simply that. It is the normal operation of the coolant in your cooling system to expand when it gets hot.
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