I’ve got kind of a weird one I can’t pinpoint. My jeep battery was dead from a light being left on. I jumped it and went inside to grab somethings. When I came back out the temp gauge was in the red so I shut it down. I let it cool to 210, then drove it up and down the street. It stayed right at 210. I thought maybe fan clutch so when I got back I let it idle and it didn’t overheat. I don’t drive the jeep very much, could the thermostat have just stuck the one time? I had a complete cooling system overhaul done about 5k miles ago. So radiator, fan clutch, water pump, and thermostat are all fairly new. Should I just give it some time and see what happens or start replacing things?
Jeep was overheating when sitting idle
- Thread starter BradD
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- overheating
Time or maybe a thermocure flush.
What was the ambient temperature?
You low on coolant?
Oil look ok...no milkshake?
-Mac
What was the ambient temperature?
You low on coolant?
Oil look ok...no milkshake?
-Mac
I was wrong on all the coolant system replacement, that was only 2000 miles ago
80 ambient temp
Coolant looks to be almost full
Oil looks good
What parts did you use?
New parts are all shut these days. I went through two part store thermostats before I got a Robert Shaw that functioned correctly.
-Mac
New parts are all shut these days. I went through two part store thermostats before I got a Robert Shaw that functioned correctly.
-Mac
I’m sure not quality. Whatever the shop ordered. I topped off the radiator, even though the overfill was full. It didn’t take too much. The shop just recently replaced a freeze plug, so maybe they didn’t add enough back in. It’s running a bit cooler at idle now. I’m going to give it a few days and see what happens. I’ll just make short trips in it until then. I’ll replace the thermostat with a quality one if I have any other issues.
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If you had to add coolant to the radiator your system is not operating properly. The role of the cap is to create a expansion bypass to the jug at a certain pressure and a vacuum from the jug as it cools.
Yhe cap could be faulty or to overflow jug hose is loose and allowing it to suck air instead of coolant.
If you have coolant in the jug, your radiator should be completely full.
Yhe cap could be faulty or to overflow jug hose is loose and allowing it to suck air instead of coolant.
If you have coolant in the jug, your radiator should be completely full.
I’ll start with the cap. It was replaced when the radiator was 2000 miles ago, but maybe it’s bad. I’ll check the hose as well, but seems tight.
Maybe a radiator cap? I had a thermostat go out 2 weeks after I installed it. You can never rule out a new part nowadays. Quality is terrible across the board. I do recommend a triple-core radiator. I installed one as I live in Houston, and it does the job well.
bohuggabee
TJ Enthusiast
Typically, if you are chasing problems. You will create more problems. You need to find the actual issue and solve it. Dont just run down a rabbit hole of issues hoping to be correct. Jeeps are simple. But a pain to work on sometimes. Like that 6th spark plug of the 4.0... what were they thinking?! And when it comes to a good jeep. Newer is rarely better. Simply replacing everything doesnt mean it will work. What worked before will keep working.
bohuggabee
TJ Enthusiast
Lol funny. Cause we got a after market “oem” cap from o reilly. Rated to 80 psi. Wouldnt seal. The original cap was clearly of high quality. But too. The radiators wear. I have to compress and set the cap on the tabs instead of proper setting lol. Ruins the springs over time but seals.
It is possible your fan clutch may be bad, sitting idling with no air/ not enough air moving through radiator, vs driving with air being forced through…
bohuggabee
TJ Enthusiast
No you didn’t buy an 80psi radiator cap from OReilly because they don’t sell an 80psi radiator cap.
bohuggabee
TJ Enthusiast
So you are wrong again. Got it. Have you even posted a single factual thing on this site?
bohuggabee
TJ Enthusiast
Do the math and physics or shut up. You keep proclaiming im wrong when i gave you the problem to solve. The problem i lived bro...
Since when is claiming you bought a 80psi radiator cap at OReillys have anything to do with math and physics? Either you did or you didn’t. You claimed you did. I pointed out you didn’t because they don’t sell one. So you are wrong again.
You are a very confused person. I recommend you not make any recommendations to anyone on how to fix anything because you are wrong about so much.
bohuggabee
TJ Enthusiast
Id argue you are confused. Because a simple wrong memory of a psi of a cap gives you an excuse to blame me for it. Yet you want more i formation. Yet you wont express the psi of coolant flow over time. Yet you wont express anything but me being a problem.
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