My Infinity is leaking antifreeze somewhere and trying to overheat. I hear noise

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! If your 2008 INFINITI G35 is still losing antifreeze after changing the radiator, hoses, and thermostat, and multiple shops haven’t found the leak, you might be dealing with something trickier, like a small head gasket leak or a faulty water pump. A head gasket can leak coolant internally without obvious signs, and it could explain the overheating attempts that self-correct. Try a pressure test on the cooling system, or consider a chemical test for exhaust gases in the coolant to rule out a head gasket issue. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554!