Daniel Boone Posted January 14, 2023 Share Posted January 14, 2023 Overheating! Have changed thermostat. Changes water pump today. Had vehicle at dealership earlier week. Dealership tested for exhaust in coolant…no exhaust. Ran for an hour trying to burp system. Heater blew hot initially then stopped and blew cool air and hoses to heater core cool to touch. Bottom radiator hose cold to touch.engine will overheat when raining rpm’s. What’s up? Please help! Quote Link to comment Share on other sites More sharing options...
Toyota Owners Club Posted February 22, 2023 Share Posted February 22, 2023 I would remove the thermostat to see if there is an even flow of coolant. If so, then chances are it is a faulty (albeit new) thermostat Air can be very difficult to remove from a cooling system occasionally but always check the obvious things first. A coolant pressure cap is a prime example of when it fails for the pressure to drop and lead to overheating and also a source to introduce air into the system......very cheap part to replace Quote Link to comment Share on other sites More sharing options...
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