....Isn't the issue normally the sunroof drain?

 

no sunroof. did you mean to post this reply to my question or to someone else?

 

I meant to reply to yours, I've just never heard of the cowl drain being an issue with the passenger floor being wet.

The drain I think you are looking for is the drain for the HVAC box, which is in front of the passenger floor in the bottom of the engine bay.

 

YOu sure you're floorboard isn't geeting wet when you use the AC? If you search AC draining in passenger floorboard/carpet, you'll find links to drilling a hole thru a plastic part of the AC under the dash/glovebox to allow access to unclog the AC drain that actually drains thru the firewall. One of the threads actually has a link to a video. My '98 XJ had the issue and we just unclogged it this past year.

 

I had it in to a mechanic the other day who checked the AC drain and said it wasn't clogged. He suggested the windshield and that's when I started trying to figure out what else it might be. Windshield is definitely not leaking - checked that when I had the cowl off earlier today. I saw some posts for other jeeps that blamed the cowl drain for the kind of water intrusion I'm getting. I put water in the cowling and it did leak into the passenger side floorboards. Does the 2004 Grand Cherokee Laredo not have a cowl drain? Any ideas what else could be causing this? Going crazy trying to figure this out. Thanks.

 

Just saw your post. I am having water in my passenger floor board also. Took out the seat, removed the carpet and noticed when I pour water into the pasenger side cowl area the water leaks into the floor board. It seems to come somewhere in the upper outside corner of the floor board but cant track it down. I too have read many posts saying the cowl drains will cause this, but like you, not one single post can describe where this cowl drain is or how to unclog it. My 2000 Grand Cherokee just seems to have a round opening in each corner of the cowl area and when you pour water into it it just runs out along the bottom of each fender, so it seems to be just a straingt drop from the top of the cowl to the ground. No drain hose or anything, just 2 big openeings in each front corner of the cowl that is just a big empty space that goes down the fender and runs out at the bottom of the fender and part of the door. Did you ever figure out how to fix it? Some said the cowl itself can leak, at the top, but not sure I understand what they mean. I have asked before and like you I got a bunch of the AC drain blocked answers but that is not it on mine and sounds like not yours. Onlky when I pour water from a jug into the corner of the cowl does it enter, If I take it to a car wash it comes in even more.

 

Has anyone ever figured this out? I'm having the same problem on an 06 Grand Cherokee. I've checked the sunroof drains. Doesn't leak when AC is in use, only when it rains, so I was thinking it's the cowl drain as well.

 

This is WJ try the WK section.

 

problem solved?

I have a 2004 grand cherokee that leaks from the fuse box area during rains. it isn't the sunroof (i already checked that) and the door seal appears to be ok. any suggestions are welcomed. this is driving me crazy.

 

This is a problem on WJ's that has been well documented. The resolution seems to be all over the place and no consensus. My 2000 does the same thing and I can't figure it out either. The first thing is to determine if you hav e water on the floor, all the time or only when it rains. If it is only when it rains then it is not the AC drain. One thing to check if it is rain related. The antenna sits on the fender, but the wire goes through the side of the vehicle. Pull back that plastic shield that is in the wheel well. No need to remove it. You will see it going into the side of the dash. The rubber grommet degrades over time an is a direct path for water that follows that antenna wire right into the side of the dash. Use some painters caulk or silicone on that area and see if that stops it. I actually had water dripping off the top of the heater box. Once I gooped that area up, that stopped. But it did not stop my water leak. I no longer have water falling off the heater box, but I still have a wet floor, "BUT ONLY WHEN IT RAINS". Apparently I have another leak that I cannot find. As far as the cowl drain. I removed that cowl cover and totally blocked that space on the far side of the cowl, up against the fender so water could not drain out of the cowl. I still had a wet floor. So, I unblocked it so water can drain out of the cowl.

The only thing I haven't tried was getting in the vehicle while it is raining to see where it is coming from. There is no indication that water is running down the firewall and onto the floor. I am lost as to what more to do.

 

Sounds like you know what you're talking about.

Very strong rain all day yesterday. No leak. Then, i get in the jeep around 5PM and go on a short drive. This morning there is water on the drivers side floor, having dripped down the fuse box. My gut feeling is that it's from the door gasket. I say this because the antenna is on the passenger side. I'm actually keeping a tupperware container on the floorboard to collect the rainwater. Believe me, there are much bigger problems in life than a small leak coming into my jeep. But, it's a major pain in the butt.

I do not think it's the rubber grommet that comes through the door on the drivers side. but i'll definitely check it out one more time. when you say the door, are we talking about the drivers side door, or the passenger side front door? regardless, i'll pull back the grommet and silicone that area. Both grommets appeared to be in great shape. on top of this, i'll have to see if i can find the antenna wire going through the passenger side door, too. maybe silicone that up.

Thanks again. i've checked this forum (and others), and google, and youtube and this seems to be an unanswered question. Everyone seems to talk about the AC drain, but the drivers side floormat is where the problem is. Not the passenger side.

Just so you know it is definitely NOT the AC drain. I had that problem about 12 years ago and haven't had a problem since i blew out the line.

 

The wire to the antenna does not go through the door. The antenna sits on the passenger side fender. The wire that connects it to the radio makes a right angle turn in the wheel well in to the cab. Just pull back the plastic sheeting over the wheel well a little and you will see it. As mwebb41231 said. there are openings at both ends of the cowl. The passenger side opening is larger than on the drivers side. I have poured water down the passenger side to see if it leaks into the cab. It does not. It seems to drain straight though to the ground in the space between the fender. I could not find a drain "tube" either. Good luck. Its been raining like crazy here and my passenger side floor is soaked.

 

thanks. i'll have to check it out tonight.

 

i believe i found the leak and i'm posting my solution here in the hope that others don't have to go through the aggravation that i have had to go through. i checked all the weatherstripping and it was ok. but, after very forcefully physically pushing it up against the frame, making sure it had not become separated, i think i've solved the water leak problem -- for now.

through other forums, i came across this product by 3M, which looks like it will do a great job at keeping the weatherstripping where it should be, as opposed to slowly starting to separate -- to the point that you don't know it has separated and you have a major problem:

3M 08008 Black Super Weatherstrip Adhesive Tube - 5 oz.

https://www.amazon.com/dp/B00063X38M/ref=nav_timeline_asin?_encoding=UTF8&psc=1

best wishes to all.

 

What is it?????

 

I might as well add my .02. My leak WAS the AC, but not from being clogged.

I did it whenever the AC is on, or just the compressor running (defrost) creating the moisture to drain.

The actual drain is pointing straight forward, as in they didn't put the 90 degree nipple on the end so it drains downward, like they used to.

When you drive, the water is forced back into the floorboard area around the drain.

I added a 90 degree hose, about 10 inches long, and of course directed it to the ground......no more leak.

I witnessed this while my carpet was pulled so it would dry out.

No rain, just the AC running, while on the highway, for about 25 minutes.

You wouldn't think that much water would pour out, or in for that matter, but it sure does.

 

I have a 2000, 4.7. I cannot find the drain. It pokes out of the firewall into the engine bay? I have seen photo's but I can't find it on mine.

 

Its not that easy to get at. Run the a/c, shine a light up there and watch for the water to run out of it

 

Thats good to know. Everybody else made it sound easy. My A/C hasn't worked in may years, so no drip.

 

Well for sure that won't be the source of your leak so don't waste time on it. Or if you think that will get your a/c working not gonna help that either.

 

mine leaks when rains and car wash it drips on floor from bottom corners of dash cant find problem area wanna chec cowl but cant remove wipers seem to be stuck

 

See photo #10 in my below cabin air filter install write-up. That slot right under the bottom middle fasterner hole is the drain slot for water flowing out of the area under the cowl towards the front. Sometimes it becomes clogged with dirt/tree crap letting water flow down in the blower motor intake where water ends up in the box along with floor.

http://www.jeepforum.com/forum/f310/cabin-air-filter-housing-write-up-3717505/#post34914297

Also see photos 11-13 for removing your wiper arms. My driver's side was seized on too but a bunch of rust cutter along with channel-locks tapped with a hammer removed it.

If you have water coming in at opposite corners under the dash likely you have some bad caulking problems where new needs installed. Door seals, windshield seal, etc, can cause leaks into the cabin. Good luck.

 

SOLVED!!!! 2004 grand Cherokee. I found the leak and it was coming from the hood release. there is a grommet that came just a little bit loose. RTV'd the heck out of it after pushing it flush and it's 1000% fixed.


good luck to everyone else on solving your water leak. these things aren't fun!

 

Hood release? Can you send a photo or drawing? My hood release handle is on the drivers. My leak is on the passenger's side. Where is this grommet you are talking about?

 

Uniblurb: that whole area on mine is clean. the water runs out of that slot and flows toward the fender and out the bottom of the vehicle.