EDITED TO ADD: after replacing the radiator cap, the engine light came on later that day while I was driving and the code it gave us was "Engine coolant not getting to operating temperature"
My 2010 Jeep Wrangler Unlimited Sahara with 92k miles began overheating a little over a month ago. Thankfully, I was close to home when it happened and was able to make it back before it reached the H completely. We started by replacing the thermostat which didn't solve anything, so we replaced the water pump as well and flushed the radiator. Still, it was overheating and losing coolant - but the overflow tank still had the same amount of coolant in it. **also before anyone asks, yes we did burp it and make sure there was no air after every time we refilled the coolant** Because the overflow was pretty full still, we replaced the radiator cap. After doing this, I was sure it was fixed as I was able to drive it for about a week and a half without losing coolant. However, a couple of days ago I went to the grocery store about 10min from our house and on my way back, the engine began overheating again. I immediately turned off the AC, rolled the windows down, and put the heat on full blast so that I could make it back to the house somewhat safely. The air that came out when I turned the heat on was pretty cool despite having my heat set as high as it will go. Every now and then on the short drive back, the heat would get hot for a few seconds then go back to being cool. When it cooled off later that day, I checked and there was no coolant in the radiator or in the overflow tank. Does anyone have an idea of what it could be or what we could try next? There are no signs/symptoms of a leak, no coolant in the oil, and the fans work. I have seen somewhere that to ensure there is no air in it with some of the 2000's Jeeps, you have to replace the coolant with the front of the Jeep on a slight incline - so we are trying that next. Anyone who had the same issue and was able to fix it - please let me know. I feel like we've tried just about everything!
My 2010 Jeep Wrangler Unlimited Sahara with 92k miles began overheating a little over a month ago. Thankfully, I was close to home when it happened and was able to make it back before it reached the H completely. We started by replacing the thermostat which didn't solve anything, so we replaced the water pump as well and flushed the radiator. Still, it was overheating and losing coolant - but the overflow tank still had the same amount of coolant in it. **also before anyone asks, yes we did burp it and make sure there was no air after every time we refilled the coolant** Because the overflow was pretty full still, we replaced the radiator cap. After doing this, I was sure it was fixed as I was able to drive it for about a week and a half without losing coolant. However, a couple of days ago I went to the grocery store about 10min from our house and on my way back, the engine began overheating again. I immediately turned off the AC, rolled the windows down, and put the heat on full blast so that I could make it back to the house somewhat safely. The air that came out when I turned the heat on was pretty cool despite having my heat set as high as it will go. Every now and then on the short drive back, the heat would get hot for a few seconds then go back to being cool. When it cooled off later that day, I checked and there was no coolant in the radiator or in the overflow tank. Does anyone have an idea of what it could be or what we could try next? There are no signs/symptoms of a leak, no coolant in the oil, and the fans work. I have seen somewhere that to ensure there is no air in it with some of the 2000's Jeeps, you have to replace the coolant with the front of the Jeep on a slight incline - so we are trying that next. Anyone who had the same issue and was able to fix it - please let me know. I feel like we've tried just about everything!
Last edited:
