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Old 01-09-2017, 07:54 PM
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TIP - Leaky Passenger Floorboard

If you experience leaky passenger floorboards after a heavy rain or a really good car wash consider this. Pull the cowl and look at the sponge that sits around the heater/AC air intake. My 19 year old TJ seemed to have this problem for some time as the foam was crushed to overlap directly into the intake box.

I've now removed the original foam and placed some new all purpose insulation foam and siliconed the lip of the factory plastic sleeve to the firewall cutout.

Hopefully this will do the trick.

Update to come in the next couple of days.

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Old 01-10-2017, 09:56 AM   #2
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Also if water is backing/filling up to where it reaches the heater intake, the cowl drain is likely plugged with debris.

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Old 01-10-2017, 01:30 PM   #3
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X2...The cowl should not collect enough water to get up that high. Sounds like the drain is plugged. Do a search on cowl drains on the forum, there are a few write ups.
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Old 01-10-2017, 04:35 PM
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I agree with your comments regarding the cowl and how it shouldn't get that much water in it. (my TJ is no submarine)

When I installed my aftermarket AC, I pulled that drain while under the hood and it was bad. I mean bad, like no one had ever cleaned it. Dirt/mud/pine-needles you name it, it was in there. The drain is all clear.

The other day, before I pulled the cowl and took the pic, I let the TJ sit in the rain for an hour (after being garaged for the weekend). The sponge soaked up enough water to show me the path of least resistance, and it overlapped right over the intake.

A solid bead of silicone and some new foam should hopefully do the trick.

Now to makeshift a new seal for the hardtop to eliminate that last leak above the wheel wells. (yaaa)

Thanks for reading and feedback.

-Ken
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Old 01-13-2017, 12:27 AM
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So far so good. The passenger side floorboard has stayed dry during the last big rain we had yesterday. I'm extremely happy and considering informing the PO just to share. I'm guessing that's why he sold the TJ during the Spring last year. This also explains the silicon bead he put at the windshield/hard top lip. He couldn't find the source of the leak.

Thankfully the recent Northern California rains gave me a perfect chance for trial and error.
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Old 02-28-2017, 07:24 PM
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For those that have been following this thread, it now has a continuation here:

https://www.wranglerforum.com/f210/98...d-1967130.html


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