Mystery overheating….
2014 JKU sport 180k
I am currently dealing with overheating every 2-3 days. I use orange dexcool, always have.
Monday the radiator is full. Orange dexcool. Operating temps 212-222 in city/highway. Thermostat opens at 208 every time. Fans come on at 222 and drop to 215. Reservoir is at MIN line.
Wednesday temps are 229-239 in city/highway driving both. Fans come on 222 and stay on and are in high gear by 230. Fans cool but can’t keep it cool.
Reservoir is full to the top with orange dexcool.
The coolant never returns to radiator.
Usually this is when I manually return coolant from reservoir and start the process all over.
Thursday same as Monday til Saturday when reservoir is full again and temps are climbing.
This Saturday I raised the front passenger side. Removed radiator cap and started engine.
Slowly poured in ORANGE coolant until full. This is when I thought I would see air bubbles come up and the coolant go down in radiator so I can add more. NOT THE CASE.
Within 30 seconds of slowly adding coolant, it rises to top and starts slowly overflowing. Does this for a couple minutes and then it’s low and I can add more. Slowly. Then it rises and overflows and then goes down and I add more. Then it rises and overflows… you get the picture. I don’t feel like I’m actually adding anything bc it pushes it back out.
Thermostat opens at 208. Upper hose is hot.
Heater on but no heat on driver side. Temp gets to 220 and it stops going down. But bubbles are coming out. They appear to be “boiling bubbles” not air pocket bubbles. And at 223 I shut it off bc it was boiling and coolant was spitting out of radiator. I let it cool for a few minutes and the without engine running was able to add coolant til it was full. Put cap on and drove for 30 minutes. Highest temp was 224, at a stop light. But held 212-219 mostly. No coolant went into reservoir.
I pointed out that I use ORANGE dexcool bc I removed the upper hose from the radiator and inside I found YELLOW coolant and jelly. I have not put anything but ORANGE in my system.
I took it to mechanic a few weeks ago and they changed
- thermostat
- cooling fan
- engine temp sensor
Obviously that did not help.
In 3 days time it was doing it again.
I think they just added coolant and that started me back on the 3 day shuffle.
In the past year I have changed
- all 12 rockers and lifters 10/2022
- thermostat (#1) 11/2022
- water pump 4/2023
- thermostat (#2) 4/2023
- radiator cap 10/2023
- thermostat (#3) 11/2023
- radiator cooling fan 11/2023
- coolant temp. sensor 11/2023
Seems to me the coolant I’m adding goes straight to the reservoir and never returns.
I’m at a loss here. Thank you all for taking the time to read and help if possible. We hope to add a second car seat in February. Not a second car payment while this one sits in the yard!!
Thank you.
2014 JKU sport 180k
I am currently dealing with overheating every 2-3 days. I use orange dexcool, always have.
Monday the radiator is full. Orange dexcool. Operating temps 212-222 in city/highway. Thermostat opens at 208 every time. Fans come on at 222 and drop to 215. Reservoir is at MIN line.
Wednesday temps are 229-239 in city/highway driving both. Fans come on 222 and stay on and are in high gear by 230. Fans cool but can’t keep it cool.
Reservoir is full to the top with orange dexcool.
The coolant never returns to radiator.
Usually this is when I manually return coolant from reservoir and start the process all over.
Thursday same as Monday til Saturday when reservoir is full again and temps are climbing.
This Saturday I raised the front passenger side. Removed radiator cap and started engine.
Slowly poured in ORANGE coolant until full. This is when I thought I would see air bubbles come up and the coolant go down in radiator so I can add more. NOT THE CASE.
Within 30 seconds of slowly adding coolant, it rises to top and starts slowly overflowing. Does this for a couple minutes and then it’s low and I can add more. Slowly. Then it rises and overflows and then goes down and I add more. Then it rises and overflows… you get the picture. I don’t feel like I’m actually adding anything bc it pushes it back out.
Thermostat opens at 208. Upper hose is hot.
Heater on but no heat on driver side. Temp gets to 220 and it stops going down. But bubbles are coming out. They appear to be “boiling bubbles” not air pocket bubbles. And at 223 I shut it off bc it was boiling and coolant was spitting out of radiator. I let it cool for a few minutes and the without engine running was able to add coolant til it was full. Put cap on and drove for 30 minutes. Highest temp was 224, at a stop light. But held 212-219 mostly. No coolant went into reservoir.
I pointed out that I use ORANGE dexcool bc I removed the upper hose from the radiator and inside I found YELLOW coolant and jelly. I have not put anything but ORANGE in my system.
I took it to mechanic a few weeks ago and they changed
- thermostat
- cooling fan
- engine temp sensor
Obviously that did not help.
In 3 days time it was doing it again.
I think they just added coolant and that started me back on the 3 day shuffle.
In the past year I have changed
- all 12 rockers and lifters 10/2022
- thermostat (#1) 11/2022
- water pump 4/2023
- thermostat (#2) 4/2023
- radiator cap 10/2023
- thermostat (#3) 11/2023
- radiator cooling fan 11/2023
- coolant temp. sensor 11/2023
Seems to me the coolant I’m adding goes straight to the reservoir and never returns.
I’m at a loss here. Thank you all for taking the time to read and help if possible. We hope to add a second car seat in February. Not a second car payment while this one sits in the yard!!
Thank you.
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