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Old 04-24-2007, 03:23 PM   #1
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Water in cab - hypothetical

Okay, I have a scenario here and I'm hoping somebody can give some input. I drove to work today with the safari, jammer, and duster in place, along with my doors (uppers included) as it was raining. Nothing got into the cabin, which is great, and my floors were dry.

I put my Rain Gear Jeep cover on and went to work as usual.

I made a run for lunch and noticed that my passenger mats (rubber) were moist. Not puddled, but just damp. My driver mats were dry.

I did have a leak that I think I fixed, but where this moisture was, there is no way water coming in from the cowling or heater core area could get to it unless it was a flood of water that would leave about 4" of water in the Jeep.

I got to thinking: Would the humidity of the day, combined with the lack of air flow from the Jeep cover and top/jammer/windows/etc and the heat from teh exhaust cause moisture in the air to condense and form this moisture?

Many times I've felt that side of the floor/carpet was wet, but couldn't find the water trail that had brought water in nor could I find enough standing water to really worry about it. I'm wondering if the heat from the exhaust and catalytic would be enough to condense the water from the air and make the carpet wet...

This never happened in California where the humidity was generally under 20% (desert area). I have noticed this phoenomenon in situations where it didn't rain.

Any thoughts or opinions?

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Old 04-24-2007, 07:20 PM   #2
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Were you running your A/C? There is something under the dash on the passenger's side that condensates with the A/C. I pulled my drain plugs and haven't noticed damp carpet since.


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Old 04-24-2007, 07:24 PM   #3
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Sounds like the drain hose on the firewall is pluggen up. It'll cause water and condensation to back up into the vent and always runs into the passengers floorboard.

It's on the firewall to the left of the motor. It just looks like a drain hose a few inches long. You can pull it off and clean it out. I shot some compressed air into mine the last time I had to clean it out. It shot crao out of there that was probably up to a decade old or more.
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Old 04-25-2007, 06:54 AM   #4
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I had it snow in my CJ6 one day. I had a ton of moisture in the cab from off-roading and the soft top was very wet. I guess the temperature and dew point were just right the one day and there it was...snow actually falling inside the jeep...and no snow falling on the outside! I thought I was going crazy.

My only solace was that my brother experienced this bizzare situation with me. Of course, my wife thinks we were hitting the tequilla too much that day but I swear we were both sober. Funny thing, I had that happen one other time a couple years later.

I agreee, sounds like your drain is clogged but I felt compelled to add my condensation story.
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Old 04-25-2007, 07:46 AM   #5
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I haven't touched the A/C since August of last year and I've already installed the j-tube fix. I've sealed up around the heater core and the cowl drain appears unclogged (just checked it this AM).

This is not a case of water free flowing into the cab or moisture wicking up through the carpet. The moisture was on TOP of a rubber mat and there was no standing water in the Jeep. It was just a fine layer of moisture well away from the dash. When I got out of the Jeep, it was dry. When I came back to go to lunch, that layer was there. The safari top, doors, jammer, duster, and Rain Gear cover ensured no water was coming in to the cab directly. If there was a leak, I woulda seen a LOT more evidence of a leak for that area to get wet (ie, 1-2" of water would have to be there).

I'm thinking it was an environmental condition of the high humidity, low air circulation, and heat from the floor/exhaust that caused the condensation to form. When I went home yesterday, it was all dry. Once I was home, I left the cover off and window down (it had stopped raining) and let the air just blow. When I covered it last night, it had dried out and the floor/exhaust was cool. I checked it this AM when I left for work - bone dry.
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Old 04-25-2007, 08:21 AM   #6
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Sounds like condensation to me.

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