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Old 10-30-2011, 12:17 PM   #1
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Does anyones YJ have really good heat?

Does anyones jeep have good heat? Last year I remember my jeep heating up really well especially in the winter. Last night it was down in the 30s and snowing, and even with the heat on, it was still cold.

I have bed liner on the floor which I know isn't the best in keeping heat in, but I had the same thing last year and the heat was much better. I'm going to get drain plugs and seal up the hard top to see if that helps. I'm also going to flush the heater core/radiator and see if that does anything.

Does anyone know if those air scoops work? Does anyone have any other ideas to heat the jeep up inside and stay warm?

Thanks everyone!

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Old 10-30-2011, 01:01 PM   #2
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How is your cooling system functioning? You may have a thermostat that is stuck open. This is usually a quick and cheap fix for these sorts of problems. $5 part plus some basic troubleshooting could save you a huge headache.

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Old 10-30-2011, 01:24 PM   #3
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im having the same problem . lastnight it got into the 30s and once at normal running temp , i tunred on my heater my engine temp dropped by like 20 degress and cold air came out. i dont not have a/c
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Old 10-30-2011, 01:40 PM   #4
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Quote:
Originally Posted by loganInaYj View Post
im having the same problem . lastnight it got into the 30s and once at normal running temp , i tunred on my heater my engine temp dropped by like 20 degress and cold air came out. i dont not have a/c
Another thing is to check for air bubbles in your system. Make sure to "bleed" the air out of it. (takes a few moments with the bleed valve open and the radiator cap open.)

If you want quicker results, take some fifty fifty and with the engine cool, open the radiator cap, if your level is not right up to the filler neck/cap, start the engine and as the level drops, add coolant, also make sure your reserve tank is topped off appropriately. I just did this to my car just the yesterday as the outdoor temps were hitting the low thirties and whaddayaknow, my heat works like it should (not my Jeep as I'm still trying to find "the one".)
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Old 10-30-2011, 01:45 PM   #5
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The heat in my 95YJ works great, I use a 180 degree thermostat, when it's cold out, I turn the heater to high before I start the jeep, this will heat up all the water in the system, if you start the jeep with the heater off, you dump alot of very cold water into the system witch will drop the temp of the system and it has to start all over again heating the system back up, flushing your system and replaceing your thermastat in September before the cold hits will make your winter driveing exspereance a much more enjoyable ride, makeing sure your top is sealed is allways a good thing, less cold air running though the jeep, less water dripping from all the leaks. Also make sure and check the vent intake in front of the widsheld that it is clear and the drain tube is not plug with leaves or other things that fall in there.
Hope this helps .
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Old 10-30-2011, 01:46 PM   #6
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If nothing else has changed, sounds like your heater core has clogged to the point where it's not allowing the coolant through properly. If your heater core is original it's highly likely it's had it. The only thing left is the leak onto the passenger side floor board.
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Old 10-30-2011, 09:38 PM   #7
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mine does this /\
the floor board dripping thingy
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Old 10-31-2011, 08:23 AM   #8
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My heat works great, swapped out my radiator, thermo and water pump this summer. I have to open the vents on the doors when I have a jacket on!
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Old 10-31-2011, 08:32 AM   #9
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mine does this /\
the floor board dripping thingy
Time for a new heater core. It's only going to get worse. Or, you can bypass it if it starts pouring out.
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Old 10-31-2011, 08:36 AM   #10
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My heater blows out hot air (not as hot as I remember it being though). But the cabin seems to not be holding it. I remember I used to start sweating in my jeep. Well I checked my radiator fluid and it's dirty. So I'm going to flush the system and refill it with fresh fluid. Hopefully that will help.

And in the winter my windows are foggy 100% of the time. Does anyone else have this problem? I think that this may be due to the hard top not being sealed. I'm going to go buy weather stripping, drain plugs, and anything else I think I might need to seal up the jeep the best I can.
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Old 10-31-2011, 08:49 AM   #11
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Your Windows being foggy might be because the top isn't sealed, if it is letting water in that is getting in the carpet and such and making the interior really really humid that would definitely do it.

One thing to make sure is that when your trying to defog your windows is that you have it on vent as to not recirculate the air from the inside of the Jeep. If the interior air is humid it will not dry the windows out as fast as if you pull drier air from the outside. In fact if the air is humid enough and you are recirculating it against the cold windows you can actually fog your windows worse by turning the defroster setting on.
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Old 10-31-2011, 09:39 AM   #12
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Originally Posted by ropanach View Post
The heat in my 95YJ works great, I use a 180 degree thermostat, when it's cold out, I turn the heater to high before I start the jeep, this will heat up all the water in the system, if you start the jeep with the heater off, you dump alot of very cold water into the system witch will drop the temp of the system and it has to start all over again heating the system back up
Ummm....ok.
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Old 10-31-2011, 11:02 AM   #13
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Quote:
Originally Posted by ropanach View Post
The heat in my 95YJ works great, I use a 180 degree thermostat, when it's cold out, I turn the heater to high before I start the jeep, this will heat up all the water in the system, if you start the jeep with the heater off, you dump alot of very cold water into the system witch will drop the temp of the system and it has to start all over again heating the system back up, .
thanks I needed a laugh today.
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Old 10-31-2011, 11:28 AM   #14
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i have to set the heat for cool or roll the windows down because the heat on my old yj is killer. even my wife (who is always freezing) complained about how hot it was
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Old 10-31-2011, 11:45 AM   #15
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mine gets so hot i'm tempted to put the top down in the winter.
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Old 10-31-2011, 01:09 PM   #16
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My Jeep gets so hot that I actually have to unzip my windows, even though it's cool out (low 60's). Too bad my axle broke, won't be able to test it on a freezing night for a while..

Quote:
Originally Posted by ropanach View Post
The heat in my 95YJ works great, I use a 180 degree thermostat, when it's cold out, I turn the heater to high before I start the jeep, this will heat up all the water in the system, if you start the jeep with the heater off, you dump alot of very cold water into the system witch will drop the temp of the system and it has to start all over again heating the system back up, flushing your system and replaceing your thermastat in September before the cold hits will make your winter driveing exspereance a much more enjoyable ride, makeing sure your top is sealed is allways a good thing, less cold air running though the jeep, less water dripping from all the leaks. Also make sure and check the vent intake in front of the widsheld that it is clear and the drain tube is not plug with leaves or other things that fall in there.
Hope this helps .
In all seriousness... The water pump is constantly pumping water through the heater core.. The lines for the heater core are bypassed from going through the thermostat...
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Old 10-31-2011, 03:20 PM   #17
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Good pointers on the foggy windows situation. I'm going to home depot tonight to pick up some weather stripping that will hopefully help. And maybe I'll go next door to autozone and buy some new radiator fluid while I'm at it. Thanks for all the help so far everyone!
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Old 10-31-2011, 05:51 PM   #18
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Quote:
Originally Posted by ropanach View Post
The heat in my 95YJ works great, I use a 180 degree thermostat, when it's cold out, I turn the heater to high before I start the jeep, this will heat up all the water in the system, if you start the jeep with the heater off, you dump alot of very cold water into the system witch will drop the temp of the system and it has to start all over again heating the system back up, flushing your system and replaceing your thermastat in September before the cold hits will make your winter driveing exspereance a much more enjoyable ride, makeing sure your top is sealed is allways a good thing, less cold air running though the jeep, less water dripping from all the leaks. Also make sure and check the vent intake in front of the widsheld that it is clear and the drain tube is not plug with leaves or other things that fall in there.
Hope this helps .
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