![]() ![]() ![]() The water pump is the heart of the cooling system in Cobalt responsible for pumping coolant throughout the system and cooling the engine. Your vehicle may also consume more fuel than normal. ![]() But if the weather is too cold, the engine may never reach its optimal operating temperature with a stuck open thermostat. Since the heating system in Cobalt relies on the hot coolant from the engine to heat the interior, the heater will blow cold air until the engine reaches its normal operating temperature. But if the thermostat has developed a defect and is stuck to open position, the coolant will continuously flow through the radiator and the engine may take a long time to reach its optimal operating temperature. When you start your Cobalt when the engine is cold, the thermostat cuts off flow of coolant through the radiator in order to quickly reach the optimal engine operating temperature. Thermostat is a part of the cooling system in Chevy Cobalt which ensures that the engine reaches its optimal operating temperature as quickly as possible and maintain it under all operating conditions. There are flush kits available in the market that can help you do the job yourself. Flushing is done by pushing water through the outlet hose of the heater core and draining the gunk from the inlet hose. Recommended videoīefore you consider replacing the heater core in your Cobalt, it is recommended to flush the existing heater core. If the coolant level is low, open the cap and pour some coolant into the tank until it is between minimum and maximum mark. You just have to locate the coolant overflow reservoir and inspect the level of coolant in it. Check coolant levelĬhecking coolant level in Cobalt is a fairly some job. The sound is most prominent right after you start the vehicle. Low coolant level or air in the heater core can sometimes cause sloshing sound from behind the dashboard when the engine is running. By filling and properly bleeding the system the heat should come back. Since the heater core is usually slightly higher, the air will accumulate in there first. If there is air trapped inside the heater core, the coolant will not be able to flow through it properly. When you turn on the heating, air gets blown through the heater core, warming the air in the cabin. The hot coolant is pumped through the heater core located behind the dashboard. The heating system in Cobalt uses hot coolant or antifreeze from the engine block to heat the interior of the vehicle. If the cooling system is not full and bled properly, the water pump will not be able to push the coolant around the system efficiently. Low coolant level or air in the cooling system can cause the heater to stop working properly in Cobalt. An X indicates that the vehicle was not manufactured for a specific year.1. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. Our subscribers provide great insights into their satisfaction by answering one simple question: If they had it to do all over again, would they definitely buy or lease the same model? In addition, respondents also rate their cars in six categories: driving experience, comfort, value, styling, audio, and climate systems. To learn about satisfaction, CR has collected survey data from our annual survey on more than half a million vehicles. An X indicates that the vehicle was not manufactured for a specific year. Based on this data and further analysis, we predict reliability for the latest year. Extra weight is given to the more serious areas such as major engine or transmission problems. The results are presented relative to the average model that year. Consumer Reports subscribers reported on any serious problems they had with their vehicles during the past 12 months that they considered serious because of cost, failure, safety, or downtime, in any of the trouble spots included in the table below. The reliability charts are based on responses on hundreds of thousands of vehicles from our latest Annual Auto Survey. ![]()
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