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Old 03-18-2012, 05:17 PM   #1
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Need Help !!!!!!!!!!!!!

I haven't driven my jeep in two weeks so today I decide to stretch her legs. I drive a couple of miles to home depot and when I get back into my jeep I see radiator fluid on the drivers side floor board.

I also noticed a tiny bit on the passengers side. It seems to be about a tablespoon or so on the drivers side and just a few drops on the passenger side. It is dripping out of the floor vents. I drove home and check everything under the hood and I can't find any problems.

Overflow is still just under FULL, no leaks on the radiator, the heater still works and I didn't notice any more on the floor board.

It is like it just puked a little and stopped. Can anyone tell me what I need to replace. I guess she is telling me not to avoid her any more.

Forgot to add 97 TJ inline 6 with 118K miles. Jeep did not overheat but I didn't drive it but a total of 5 miles probably. I was thinking heater core but I thought more fluid would be on the passengers side.

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Old 03-18-2012, 05:22 PM   #2
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It could be the control valve inside the heater, at least that's where my pickup was leaking from when it leaked inside the cab.

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Old 03-18-2012, 06:02 PM   #3
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seal for the heater core? just throwing it out there or the heater core, some experts will chime in. good luck though!
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Old 03-18-2012, 07:45 PM   #4
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Well I went for a drive again and nothing. I don't get it but maybe a valve was stuck or something that allows coolant to do this?

It still hasn't overheated and I can't tell that anything is wrong at all. I guess I will drive it tomorrow to work and see what happens. If anyone knows if it is possible for a valve or something to stick and then start working please let me know. Obviously having coolant on the floor isn't normal.

The only reason I think it was something stuck is because I had the air on when I shut it down two weeks ago so when I started it up after all that time perhaps something was stuck open? The only other thing I noticed was the if I put the air controller on heat/floor it doesn't seem to blow as strong as it does when it is on cool/floor. It does blow nice and hot so I don't think my heater core is the problem but at this point I really have no idea.

Gota love Jeep.
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Old 03-19-2012, 08:09 AM   #5
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Not a drop today after a 17 mile trip? I don't think I understand jeeps very well. The only thing I can think of is the heater core but I would think it would also leak and it isn't leaking from beneath it but rather from the floor vents.
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Old 03-19-2012, 08:22 AM   #6
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Has to be heater core related and I can't think of a situation where it would be a one time thing.

Regardless, if it were me I woe just watch it.
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Old 03-19-2012, 09:13 AM   #7
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There is no valve for coolant inside the cab. The heater core is a sealed unit and goes through the firewall. The only way to get coolant inside the cab is if the heater core is leaking, and the only way to fix a leaking heater core is to replace it.
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Old 03-19-2012, 10:57 AM   #8
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Quote:
Originally Posted by WickedVision View Post
There is no valve for coolant inside the cab. The heater core is a sealed unit and goes through the firewall. The only way to get coolant inside the cab is if the heater core is leaking, and the only way to fix a leaking heater core is to replace it.
I guess I already knew it but I am in denial. Can I ask though, wouldn't this leak all the time?
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Old 03-19-2012, 11:37 AM   #9
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Got a quote, $525 with a 1 year warranty. Seems pretty reasonable but this is with an aftermarket heater core because the OEM core is $400.

I have heard estimates from 800-1000 so I am waiting to hear back about another place and see what they quote.
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Old 03-19-2012, 01:13 PM   #10
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What about buying a heater core from rockauto.com and doing it yourself? You can get a new HC from there for 35 bucks. It's isn't that bad of a job to change out, just takes a little time to do. It can be done with the most basic set of tools. Got one there for my 94 2 years ago and she's still going strong after 10K miles. Just my $.02.
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Old 03-19-2012, 01:34 PM   #11
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Quote:
Originally Posted by doolyd

I guess I already knew it but I am in denial. Can I ask though, wouldn't this leak all the time?
Jeep heater cores tend to get really gunked up from crap in the coolant system. The leak is probably gunked up, that's probably why it doesn't do it all the time.
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Old 03-19-2012, 01:36 PM   #12
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Yeah, I always try to do any repairs myself but after researching this one it looks like a nightmare and isn't very well documented online. I don't have a service manual and the idea that you have to remover the steering column and the entire dash doesn't sit well with me. I could probably get it apart but putting it back together again....well I am not sure I could.

I watched a video on Youtube of a guy doing it that was pretty funny. He didn't go into details but rather kept showing stages of the progress and making comments. Watching that video and seeing the guts everywhere is what has scared me from doing it.

Seems when I do repairs I break two other things so this might just have to be left to the pros.
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Old 03-19-2012, 03:01 PM   #13
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There is no valve for coolant inside the cab. The heater core is a sealed unit and goes through the firewall. The only way to get coolant inside the cab is if the heater core is leaking, and the only way to fix a leaking heater core is to replace it.
Where is the control at that restricts the water flow through the core?
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Old 03-19-2012, 08:30 PM   #14
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Quote:
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Jeep heater cores tend to get really gunked up from crap in the coolant system. The leak is probably gunked up, that's probably why it doesn't do it all the time.
I did a radiator flush a couple of months ago and no gunk came out and also no problems were evident. Strange that it didn't leak today at all and I drive 17 miles to work this morning and back this evening.
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Old 03-19-2012, 08:31 PM   #15
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I agree.
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Old 03-19-2012, 08:34 PM   #16
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Quote:
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Where is the control at that restricts the water flow through the core?
There isn't one.
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Old 03-19-2012, 09:09 PM   #17
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There isn't one.
Ok, so it's not the old fashioned kind of heater I'm familiar with. How do they control the heat? The old type just closed a valve partially/variably to increase or decrease heat in the core.
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Old 03-19-2012, 09:44 PM   #18
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The fan I presume.
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Old 03-24-2012, 10:49 PM   #19
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Well, drove down to the coast and back; probably drove 200 miles. Not a drop. Very strange these jeeps are.

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