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Old 08-19-2014, 10:59 PM   #1
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water leaking

My 95 YJ leaks bad when it rains. My feet get soaked as water pours in from somewhere up in the dash. Any suggestions? ??

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Old 08-19-2014, 11:06 PM   #2
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There are vents up under the dash that open and close (or supposed to close) with vacuum. When you switch the heater control to vent it sends a vacuum signal to open the door that goes to the passenger side, and a cable does the door on the drivers side. Sometimes the cable gets rusty and sticks open a little, and this lets the rain in.

The rain is going into the vent on the cowl, and running into the heater.

You can check the vent drain tube which is located in the engine compartment, on the firewall just to the passenger side of the motor. Comes out of the firewall and points down toward the starter. It's about 1.5" in diameter black tube. Sometimes it gets clogged with mud or debris.

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Old 08-19-2014, 11:08 PM   #3
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For a more detailed idea of the vent doors, look at the top of the Tech forum page under the heading "YJ heating system explained".
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Old 08-30-2014, 11:34 PM   #4
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I have the same problem, thanks for the advice. I'll check it out this weekend
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Old 09-01-2014, 08:27 AM   #5
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Exactly

You can check the vent drain tube which is located in the engine compartment, on the firewall just to the passenger side of the motor. Comes out of the firewall and points down toward the starter. It's about 1.5" in diameter black tube. Sometimes it gets clogged with mud or debris.[/QUOTE]
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Old 09-01-2014, 10:27 AM   #6
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My vent tube was 50% full. I also took some PB Blaster and sprayed the mechanism on the passenger side vent. Now everything works perfectly.
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Old 09-15-2014, 06:38 PM   #7
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So after doing all of the cleaning and lubricating we had another rain storm. Water is still coming in from under the dash somewhere.

Any more ideas?
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Old 09-15-2014, 07:18 PM   #8
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Check out the thread called. "YJ Heating System Explained". I think it's a sticky. There's some really good explanations of how the hvac system works, which could help diagnose any possible leaks coming through the cowl.

Btw, i checked out my vent tube and it felt like Chicago sausage it was so full! Cleaned it and no more leaks.

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