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Unread 08-12-2011, 09:56 PM   #16
firefighter315
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1994 YJ Wrangler 
 
Join Date: Jun 2008
Location: Kentucky
Posts: 1,827
Quote:
Originally Posted by Matt24138 View Post
I have been chasing a leak forever I have done all the suggestions. First check the drain hose on the firewall and cut off the bottom where it is tapered. Helps to avoid clogs. I am now replacing my windshield frame and doing my 4th cowl seal. If you do the seal make sure you loosen the hinge bolts and push down on the frame. This helps get proper preassure on the seal. Good luck I have spent several hundred dollars and a bucket of money on this issue. I wouldn't care except the water dumps on my fuse block and I lose my headlights and wipers. Not good in the rain lol.
OP, if you haven't done this yet, check it next. It is a short, large diameter black rubber tube hanging from the bottom of the cowl intake and it is right against the middle of the firewall. Up high in the engine compartment. It will look flat or tapered at the bottom and notoriously fills with silt, mud, gunk, and clogs up, resulting in water collecting in your cowl intake and finding it's way into your floorboards/dash. I didn't cut mine at the bottom like Matt suggested, just take it off and clean it out from time to time. It's simple to get off there and clean.

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Unread 08-12-2011, 11:51 PM   #17
Matt24138
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1993 YJ Wrangler 
 
Join Date: Apr 2010
Location: Bethany Beach, Delaware
Posts: 259
I will say I cut mine a year ago and it has never clogged again.
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Unread 08-13-2011, 12:01 AM   #18
JKRolling
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2010 JK Wrangler 
 
Join Date: Feb 2011
Location: Gallatin, TN
Posts: 301
Back when I had my YJ, I dreaded rain. Water came in through some unknown point in the windshield frame, and spilled out around the interior seal. The worst was when it would trickle down back behind my dash and short out the radio. I filled in the whole thing with epoxy to no avail. It would just start leaking somewhere else. I felt like the guy with all his fingers plugging holes in the dam.
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Unread 08-13-2011, 01:31 AM   #19
tankinyj
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2012 JK Wrangler 
 
Join Date: Jul 2011
Location: huntington, NY
Posts: 527
The heater vent has 2 drain plugs. both are under the hood. These can get clogged with dirt + debris, and thus dont allow the water taht gets into the cowl vent to drain correctly, causing rot and thusly leaking into your cab. They are small 'elephant trunk' looking black tubes, look into that. theres a thread on here somewhere explaining it better than i can. I had the infamous dashboard leak, until i found that thread and fixed my drain hose problem

edit: i noticed a couple posts up someone described this, he did however forget to mention that there are 2, TWO, drain hoses. the other one is oddly placed underneath the battery/fusebox, hard to find, but its there
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