I am original owner of a manual transmission 2011 Sonata GLS with about 85,00 miles. Car recently overheated a few times. No visible fluids under car at any time. I took the car to a Goodyear service center and I explained the situation to them and asked them to check the car out and let me know. They told me the thermostat housing was leaking coolant and needed to be replaced and gave me a quote to do that and replace thermostat and gaskets plus a coolant flush for $500.
I told them to go ahead and after they did the work they told me the housing was still leaking and since the new housing didn't solve the problem they put the old one back on and suggested I go to Hyundai. No charge. Since then, 9/2/21, car is running fine and coolant level hasn't moved . Today it's down toward the low line of reservoir so I assume there's still a small leak. Goodyear rep said he didn't know why the new housing didn't solve the problem but said sometimes with aftermarket parts there's a slight difference in specs which could cause this. Has anyone had this problem?
I told them to go ahead and after they did the work they told me the housing was still leaking and since the new housing didn't solve the problem they put the old one back on and suggested I go to Hyundai. No charge. Since then, 9/2/21, car is running fine and coolant level hasn't moved . Today it's down toward the low line of reservoir so I assume there's still a small leak. Goodyear rep said he didn't know why the new housing didn't solve the problem but said sometimes with aftermarket parts there's a slight difference in specs which could cause this. Has anyone had this problem?
