Bosco Posted March 16, 2023 Report Share Posted March 16, 2023 My 2014 Dodge Journey began overheating. I relaced the water housing/thermostat and it was running great. Now 2 weeks later same thing happened. This time I took it to the shop, the inspected and said it was the thermostat. I said I just changed it and they said it may have been faulty. So I replaced it again. It was running fine and now began overheating. All symptoms the same. Now I have flushed the cooling system thinking maybe there was a blockage. It's still overheating. Do I need to replace it a 3rd time now the system has been flushed? Any ideas what might be going on? This time the coolant was very low before I flushed it. Please help. Quote Link to comment Share on other sites More sharing options...
5rebel9 Posted March 16, 2023 Report Share Posted March 16, 2023 I will GUESS you are working with a 3.6 V6 motor? More background info like engine, rear heat system or not, mileage and what kind of weather conditions would be very helpful for more than just guesses in response. Throwing in parts gets very expensive, you may want to find a better shop for a more thorough diagnosis. Quote Link to comment Share on other sites More sharing options...
DodgeaWrench Posted March 16, 2023 Report Share Posted March 16, 2023 In my days of owning 6 cyclinder Pontiacs, it happened on more than 1 vehicle, overheating and loss of coolant meant a leak in a head gasket. Quote Link to comment Share on other sites More sharing options...
Bosco Posted March 16, 2023 Author Report Share Posted March 16, 2023 Sorry about that. 154,000 miles, 2nd row heater controls, 3.6 engine. The weather has been anywhere from the 20's to the 50's. Quote Link to comment Share on other sites More sharing options...
2late4u Posted March 16, 2023 Report Share Posted March 16, 2023 (edited) might be a stupid question but did you bleed the air out of the system? also what are the symptoms? using coolant,overheating,code for the thermostat, Edited March 16, 2023 by 2late4u Quote Link to comment Share on other sites More sharing options...
2late4u Posted March 16, 2023 Report Share Posted March 16, 2023 i wonder if the coolant temp sensor is going bad and or causing the fans not to turn on at the right time, strange it ran fine for 2 weeks and then happened again. Quote Link to comment Share on other sites More sharing options...
5rebel9 Posted March 16, 2023 Report Share Posted March 16, 2023 IF truly overheating {and resultant COOLANT LOSS} which you have not yet confirmed.... Air entrapment in the cooling system will cause "overheating" symptoms. It take time and bleeding out trapped air by slowly filling the system and letting air purge out. These motors do NOT take well to "fill and go" coolant fills. You have rear heat with coolant lines that go all the back to the RR corner and back, LOTS of room for air to get "stuck" in. As a CHEAP addition to what you have done, I'd suggest a new cap for the restank/fill point. 2late4u 1 Quote Link to comment Share on other sites More sharing options...
Dodgems Posted March 17, 2023 Report Share Posted March 17, 2023 When does it overheat? All the time. When sitting at idle. While at highway speeds. Does the engine cooling fan come on? What is the coolant level? Do you see a coolant leak? What does the engine oil look like? Is it full? low? Overfilled? Do you have a pressure tester? 2late4u 1 Quote Link to comment Share on other sites More sharing options...
Delia Posted April 11 Report Share Posted April 11 We have replaced the coolant thermostat three times now, and now we are being told thermostat housing melted to block, after repair found cylinder head gasket is excessively blown. Found coolant purges from cooling system while running due to exhaust gasses leaking into cooling system. Would this be caused due the thermostat not doing what it's supposed to be doing in the first place. And now it's going to cause thousands of dollars to fix my car. Quote Link to comment Share on other sites More sharing options...
larryl Posted April 11 Report Share Posted April 11 Are you blaming the person who replaced three thermostats or another junk vehicle post ? Three thermostats seems quite excessive as I still have my original one.. Quote Link to comment Share on other sites More sharing options...
5rebel9 Posted April 11 Report Share Posted April 11 8 hours ago, Delia said: We have replaced the coolant thermostat three times now, and now we are being told thermostat housing melted to block, after repair found cylinder head gasket is excessively blown. Found coolant purges from cooling system while running due to exhaust gasses leaking into cooling system. Would this be caused due the thermostat not doing what it's supposed to be doing in the first place. And now it's going to cause thousands of dollars to fix my car. Would be nice to know what engine size, but I will ASSUME the 2.4 4 cylinder motor. And YES a bad head gasket improperly diagnosed as thermostat will make replacement thermostats go bad also. Sorry for your major repair expense, as head gasket AND possible warped head is a very costly repair bill. You might want to think about a good used motor to be installed verses repairing the one you have. 2late4u 1 Quote Link to comment Share on other sites More sharing options...
2late4u Posted April 12 Report Share Posted April 12 12 hours ago, Delia said: We have replaced the coolant thermostat three times now, and now we are being told thermostat housing melted to block, after repair found cylinder head gasket is excessively blown. Found coolant purges from cooling system while running due to exhaust gasses leaking into cooling system. Would this be caused due the thermostat not doing what it's supposed to be doing in the first place. And now it's going to cause thousands of dollars to fix my car. lkq is a big used part /engine supplier Quote Link to comment Share on other sites More sharing options...
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