Jeep is used for short commutes only (less than 4 miles) and it overheats if used for anything other than that. I have replaced the thermostat, head gasket, valve gasket, intake/exhaust gasket, flushed the radiator, and made sure the water pump is working. It’s still overheating. Previous owner put in electronic fans and an aluminum radiator so I’m thinking going back to a stock fan. If that doesn’t work then I’ll swap the radiator. Am I missing anything?
Still Overheating
- Thread starter tema180
- Start date
Idk off the top of my head but I'd probably guess that would be close enough to not make it overheat?
The 4.0 never came with electric fan,conversions hardly ever work,go back to stock fan and heavy duty clutch,you should be good.
Stock fan. Hayden clutch.
Check and see if the AL rad is sealed on the inside with epoxy, which ruins the conductivity. I seem to remember some of those popping up in discussions.
Check and see if the AL rad is sealed on the inside with epoxy, which ruins the conductivity. I seem to remember some of those popping up in discussions.
Yes.
Depending on the yr, some use 4 studs to connect to the water pump, others use a single large nut.
Depending on the yr, some use 4 studs to connect to the water pump, others use a single large nut.
KennethS
TJ Addict
Mine did that with an aftermarket aluminum radiator. It would not just overheat, but boil violently. Took me a long tine to figure out what was wrong, but finally discovered the radiator tubes had ballooned, which caused the cooling fins to fold over and block air flow.
Mine does the same. I think my lower radiator hose may be a little ballooned too as I just checked it after reading your comment. Did you just replace the hose and that solved the problem? Thanks to everyone so far for all the input.
He said "radiator tubes", not radiator hoses. Metal tubes in the radiator. Metal cooling fins.
Overheating by puking fluid, or based on what you think overheating looks like on the temp gauge?
What brand radiator cap?
Temp gauge redlines and the boiling coolant are my 2 indicators. I think I got an 18psi Gates radiator cap.
It may be worth trying a mopar cap. I tried two other “18 psi” caps that both let coolant into the over flow bottle.
If you install a cap that doesn't allow coolant into the reservoir, your radiator, hose, or something else in the cooling system would blow.
By design, when pressure builds to the cap pressure, the 18psi, or whatever it is, is maintained by allowing some coolant into the reservoir. If working correctly, the same amount of fluid is then pulled back into the radiator as the system cools.
Maybe you could explain exactly what you mean by "burping".
I thought that was a thing you do with a baby after feeding.
https://www.instructables.com/How-to-Burp-your-cars-cooling-system/
That’s a pretty good explanation, running the engine with a funnel of coolant in the radiator to release any air in the system.
I used this kit:
https://www.amazon.com/dp/B01I40ZQWE?tag=wranglerorg-20
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