Background: 96XJ Country I6 4.0 with about 147K on the odo. I've had nothing but great things from my Jeep with the exception of the cooling system. Today I was sitting in the drive thru while idling and the temp started to climb. Nearly reached the red when I finally got through. I parked and cut off the engine and noticed the steam from the hood. Antifreeze all over the ground just pouring out from around the passenger front tire. Just for the record this isn't the first and I feel like it won't be the last time this happens. I have replaced the water pump and the drive belt. Also I have changed the thermostat. I'm sure I've replaced the upper radiator hose and the idle tensioner last year. I'm started to get aggravated by this coolant spew ever so often. I'm wondering if I have a leak in a line somewhere, yet I'm not sure why it keeps overheating. It has always had a tendency to run a little warm when sitting in traffic or a drive thru. I guess my question is, has anybody had this similar issue? Does anybody have any suggestions or upgrades I could do to make the cooling/heating system more efficient?

 

How is your radiator? Have you flushed it, is it plugged?

 

Most common reason for over heating at idle is a bad fan clutch

 

The chain is only as strong as the weakest link. Continue replacing weak links.

 

First off make sure the coolant in the system is the correct coolant aswell as the correct dilution (50/50, if its not somewhat around the 50/50 it can actually cause the jeep to overheat)

secondly, do you have a fan shroud? my jeep didnt and it makes the fan pointless to even be in the engine compartment. You can pick a shroud up at the jy if you dont have one. If not the fan clutch seems like the issues seeing that you have replaced the water pump and thermostat. check the hoses and make sure you have a good flow going through the radiator.

other than that bring it to a shop haha

 

Thanks for all the help from everybody! Ended up being a bad water pump had to replace it. Everything running smooth again! Thanks again for the help