Hey guys I have a 4 cylinder 1995 Jeep Wrangler. I am in Kansas and it is -8 degrees with the wind chill. Tonight I got off work, let my Jeep warm up and I headed home. My temperature was at 210 and everything was normal. Then the next thing I know my heater which was on max heat and on high started blowing out "FREEZING" cold air! I looked down and my temperature was shooting up like a rocket! It was about red lining when I pulled over and let her idle. After a few seconds of idle the heat kicked back on and the temperature went down. I have been doing some research and some people said that it could just be that I am lacking some antifreeze. Any help would be amazing! I just want to see what you all think. Thanks so much!
lol just check your overflow valve and c if its good or not. hmm its wierd that ur heat went cold. if i member correctly the heater gets its heat from the antifreeze through that hose that goes through the firewall, Its possible that u had cheap antifreeze or some water in there witch froze and clogged it for a second or caused an air pocket. COuld be wrong not sure
Ok guys so I replaced the thermostat today and I took her out on a test drive. It was weird because it did the EXACT same thing. All of a sudden the heat stops and it goes ICE cold! Then at the exact same time my temperature goes nuclear (The temp was red lining!)! They seem to go hand in hand. I let it cool down and took it back home. During the drive back it again went ICE cold through the vents when I had the heat on high and at the exact same time, my thermostat showed my jeep going nuclear! When I got back home I let it idle and it seemed to be doing ok. I revved it and put her at 2000+ RPM's for 3 minutes straight and the heat did not go away and the Jeep did not go nuclear. Any ideas on what the problem is? I changed the thermostat and the radiator does not have any leaks in it at all. Could this be a water pump issue? It seems that whatever is causing the problem works for a bit and then craps out. My only idea is the water pump, so any other help would be amazing! I am in college and if I do not get this girl back on the road by monday I am screwed. Any help would be amazing. Thanks so much guys!!
I had a problem with my heat going out in my jeep after I did a water pump thermostat and radiator it worked good. Did you put a new radiator in? What size engine? I have the 4.2 and the waterpump isn't hard at all and im not a great mechanic lol. Make sure water isn't getting in your oil though then there is trouble, and check coolant level too.
check your radiator hoses, the one at the bottom has a spring in it so it will not calaps(speeling) if that spring has ruted to the point that it will not hold the hose open, the hose will flatton from the suction of the water pump, had this once.
hope this helps.
No I have never done a radiator flush before. I really hope it is not the radiator tho. I will check all the hoses, especially the upper and lower radiator hoses today. If they are in good shape then I will replace the water pump. I guess if it still acts up and over heats then the only explanation is that the radiator is giving out... Thanks a lot guys and if you have any other ideas please let me know!
Well I replaced the thermostat and the water pump. Then I "Burped" the radiator. Everything seems to be ok now! I took her out for a test drive and the temperature in the engine was within 175-210 degrees the whole time. It seems to fluctuate a lot now though. It used to stay at 210 degrees the whole time, but now since I have put the new parts in it goes up and down a lot. The GOOD thing is that it does not go over 210 degrees and I have heat. Any idea why it is not constantly at 210 degrees now? Not that I mind because when it goes under 210 it obviously means that my jeep is cooling itself down very effectively. Any ideas would be great. Thanks again guys, all your input is greatly appreciated!
Oh an I also drained all the old antifreeze and put in all new 50/50 today as well! I have pretty much done everything that I know except replace the radiator and its hoses. Lol, I hope that she does ok tomorrow when I drive her!
Its probably circulating a little better with the new pump and proper level. The better it circulates and the colder it is outside the faster it will drop when the thermostat opens which is likely the reason it is dropping lower than before.
Nothing is foolproof to a sufficiently talented fool.