Canít find interior leak - JeepForum.com
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post #1 of 16 Old 06-13-2019, 12:04 PM Thread Starter
Bmann412
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Canít find interior leak

Hi

I am pretty new to the grand Cherokee/ cherokee world but not new to jeeps. My sister has a 2001 wj 4.0l Laredo that any time it rains the passenger side floods. I have check the drains for the sunroof and donít see any splits or signs of water. It looks like the leak is coming from the fire wall behind the dash but I am unable to see from where. I tried adding some silicon to the seam in front of the fresh air duct under the cowl but it is still leaking. I am having trouble finding any other information on this subject and really donít want to pull the dash. Any help would be appreciated.

Thanks
Ben


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1978 CJ7 Renegade
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post #2 of 16 Old 06-13-2019, 12:24 PM
LuthWJ77
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Here's a place to start but search the forum with "rain leaks" and stuff like that could be a few places common on the WJ.

https://www.jeepforum.com/forum/f310...d-wet-1261915/
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post #3 of 16 Old 06-13-2019, 03:44 PM
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Theres a little nipple stickungnout of the firewall in the engine bay that drains AC condensate. It's too short to effectively drain while moving and the condensate can blow back up the outside of the drain pipe and leak down the inside of the firewall. You need to extend it with a piece of , I believe, 1/2 tube. Others have used a rubber elbow fitting that fits on the drain tube nicely. This came up recently here in the past couple months. As search might help. But, I had the same issue. Its astonishingbhow much water collects on the floor from this. I thought it was my sunroof drain tubes, but they're good. Input a short, 4" extension on the AC drain and havent had a problem since.

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post #4 of 16 Old 06-13-2019, 05:30 PM
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Double post

Last edited by Mofugly13; 06-13-2019 at 05:31 PM. Reason: Double posted
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post #5 of 16 Old 06-13-2019, 07:16 PM
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Also look at where the antenna gos in from the outside. check the grommet that's hidden under the plastic wheel well


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post #6 of 16 Old 06-13-2019, 08:43 PM Thread Starter
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Canít find interior leak

Quote:
Originally Posted by LuthWJ77 View Post
Here's a place to start but search the forum with "rain leaks" and stuff like that could be a few places common on the WJ.



https://www.jeepforum.com/forum/f310...d-wet-1261915/
Thanks! I was just reading this post before you sent it to me. It seems like their problems stemmed from bad windshields which I really hope thatís not the case for me.


Quote:
Originally Posted by 97Mule View Post
Also look at where the antenna gos in from the outside. check the grommet that's hidden under the plastic wheel well
Thanks! I will have to check that out



Quote:
Originally Posted by Mofugly13 View Post
Theres a little nipple stickungnout of the firewall in the engine bay that drains AC condensate. It's too short to effectively drain while moving and the condensate can blow back up the outside of the drain pipe and leak down the inside of the firewall. You need to extend it with a piece of , I believe, 1/2 tube. Others have used a rubber elbow fitting that fits on the drain tube nicely. This came up recently here in the past couple months. As search might help. But, I had the same issue. Its astonishingbhow much water collects on the floor from this. I thought it was my sunroof drain tubes, but they're good. Input a short, 4" extension on the AC drain and havent had a problem since.

Sent from my SM-G960U using Tapatalk


Thanks I will have to give this a try this weekend. Is this more from the condensation from the ac or does rain take part in this as well?

1998 TJ 5.9l
1978 CJ7 Renegade
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post #7 of 16 Old 06-13-2019, 09:15 PM
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Just the AC condensation as far as I know. Unless the cowl drains out the same tube...


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post #8 of 16 Old 06-14-2019, 09:59 AM
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Here is my journey with a leaking WJ. Your post made me realize I never updated mine with a solution, so I just posted my fix.

Windshield, cowl area, sunroof (you already checked it), door seals, roof rack bolts, a/c drain, antennae area- those are all locations to check. My leak almost kicked my butt. As the old saying goes, it is usually the last place you look, and that proved to be the case.

I would pull the carpet back, remove the door panel, and take a bright flashlight while someone soaks the area with a hose. Start low at the bottom of the door, come up the area between the door and fender, then hit the cowl, move up the windshield, top of windshield, up to the roof rack and sunroof. Run the flashlight over all the areas, looking for the source.

The good that came out of it was all new door/hatch seals, a replacement windshield seal (mine was only sealed in a few spots; the original adhesive had turned loose in many areas), and a few new curse words I created.
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post #9 of 16 Old 06-16-2019, 03:18 PM Thread Starter
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Canít find interior leak

Thanks everyone for the suggestions. After crawling around the Jeep this weekend and pouring water down from the roof we have narrowed the leak down to either the inner or outer seal.
This is about where the water enters the interior but you can hear it running down the side of the door. We tore apart the door to verify not water was inside. Any suggestions on which seal to replace first? Money is tight and canít afford both at this time.

1998 TJ 5.9l
1978 CJ7 Renegade
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post #10 of 16 Old 06-17-2019, 03:40 PM
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I would say the door seal. You're sure water isn't leaking from the bottom of the moisture barrier and going over the seal? Just double checking, since that is a pretty cheap fix.

From your pic, that door seal looks pretty worn out. If that is the culprit, you can get a replacement 3rd party seal for $30 or so.
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post #11 of 16 Old 06-17-2019, 06:31 PM Thread Starter
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Quote:
Originally Posted by DJCantonGA View Post
I would say the door seal. You're sure water isn't leaking from the bottom of the moisture barrier and going over the seal? Just double checking, since that is a pretty cheap fix.



From your pic, that door seal looks pretty worn out. If that is the culprit, you can get a replacement 3rd party seal for $30 or so.


I double checked and the moisture barrier Is still dry. Are 3rd party seals worth it or should I buck up and get the mopar ones?

1998 TJ 5.9l
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post #12 of 16 Old 06-17-2019, 07:14 PM
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Doors can fill up with water. Somewhere at the bottom of where your outer door skins meet the inner door frame are holes or slits that allow that water to drain out. Make sure that those drains are not plugged.

If you cannot fix it with a hammer then it has to be an electrical problem.
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post #13 of 16 Old 06-17-2019, 07:21 PM Thread Starter
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Thanks I will check that out. Any good way of clearing the out? Compressed air?

1998 TJ 5.9l
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post #14 of 16 Old 06-17-2019, 07:33 PM
Boojo35
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Poke something up through it. Air... But if it is clogged the inside of the door ultimately needs to be cleaned out.

If you cannot fix it with a hammer then it has to be an electrical problem.
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post #15 of 16 Old 06-17-2019, 08:06 PM
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Quote:
Originally Posted by Bmann412 View Post
I double checked and the moisture barrier Is still dry. Are 3rd party seals worth it or should I buck up and get the mopar ones?
I used Mopar on the front doors, OmixAda on the rear. Both seem to be very good quality seals.
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