Have a leak and no idea where it is coming from. Need Help - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 20 (permalink) Old 05-02-2019, 10:19 PM Thread Starter
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Have a leak and no idea where it is coming from. Need Help

So I had a windshield installed awhile back and it cracked due to the windshield being bad. Once they replaced it after a few weeks I noticed water on the inside of the Jeep on the dash along with water coming from the passenger side A Pillar. I also noticed the headliner between the windshield and the front of the sunroof would get wet as well. I tested the drain tubes and they seem to be working. I took the Jeep back to the place that installed it and he put sealant around the windshield and tried to figure out where it was coming from but said he couldn't find it.

I have no idea whats the problem. I poured cups of water on the windshield and sunroof to see if I could make it leak but I couldn't. It seems to only happen when I drive (from what I can tell atm) like the water collects then it gets wet wherever the momentum takes the water. No other spots on the interior are wet either so I dont think it would be coming from anywhere further back on the Jeep like the skylights in the rear .

Last edited by Dyson350; 05-02-2019 at 10:29 PM. Reason: typo
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post #2 of 20 (permalink) Old 05-02-2019, 10:57 PM
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Water coming from the PS A pillar and wet on the front of the headliner are generally the sign of clogged sunroof drains. You said that they seem to be fine. I would clean them out anyway, might just be a slower then needed drain. I have to clean mine twice a year, I live in a conifer forest, and we get 54" of rain fall a year. Lots of needles and debris. I've rigged up an air nozzle with a tube, and put my compressor's pressure regulator down to about 10 psi.
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post #3 of 20 (permalink) Old 05-02-2019, 11:02 PM Thread Starter
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I will give it a shot, but like I said. I have poured a full cup of water into the tray directly over the hole and I didn't see any kind of back up other than the fact I'm pouring lots of water in a small area. Also like happened today. there was lots of water on the dash right in the center of the Jeep. It rained but I don't think it rained enough to cause water to reach all the way to the center of the tray and spill over into the headliner, especially if I just poured lots of water and didn't notice any issues.
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post #4 of 20 (permalink) Old 05-03-2019, 08:32 AM
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Originally Posted by Dyson350 View Post
I will give it a shot, but like I said. I have poured a full cup of water into the tray directly over the hole and I didn't see any kind of back up other than the fact I'm pouring lots of water in a small area. Also like happened today. there was lots of water on the dash right in the center of the Jeep. It rained but I don't think it rained enough to cause water to reach all the way to the center of the tray and spill over into the headliner, especially if I just poured lots of water and didn't notice any issues.
If it was me, I'd take it back to the guys who replaced your windshield and say "Hey, WTF?" I didn't have this problem before you replaced the windshield.....


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post #5 of 20 (permalink) Old 05-03-2019, 05:52 PM Thread Starter
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That's what I have been doing. This will be the 2nd time Ive had it in there. Its about to the point Im gonna say look if you cant fix it then I need to take it to someone else, BUT if they tell me its the windshield I am having the bill sent to you.
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post #6 of 20 (permalink) Old 05-03-2019, 08:26 PM
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Do you know if they sealed the top of the the windshield? If not you may get a whistle at high speeds and also water leaks
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post #7 of 20 (permalink) Old 05-04-2019, 04:48 AM
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Also check the cowl screen seal around the lower portion of the windshield. The previous owner had the one on my vehicle replaced and they destroyed this seal and had uneven sealant in this area that I had to fix. I also ran another bead at the top of the windshield just to be sure.
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post #8 of 20 (permalink) Old 05-12-2019, 09:01 AM Thread Starter
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I am still trying to find the problem. They used a hose on the windshield and did not get any leaks. I took it to another shop to look at the sunroof and they cleaned the seals and adjusted the sunroof along with look at the drain hoses and also let water pour across it and they said no leaks.

Last night is rained hard and when I got in the Jeep there was a big puddle on the dash and the headliner from the front of the sunroof to the windshield was wet as well. There is also no wet headliner anywhere else inside the Jeep. Considering the Jeep was sitting and not moving yet the wet headliner reach as far back as the sunroof I am pretty sure that takes the windshield out of the equation. I have no idea where the hell the leak is coming from. It makes 0 sense.
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post #9 of 20 (permalink) Old 05-12-2019, 12:40 PM
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Originally Posted by Dyson350 View Post
I am still trying to find the problem. They used a hose on the windshield and did not get any leaks. I took it to another shop to look at the sunroof and they cleaned the seals and adjusted the sunroof along with look at the drain hoses and also let water pour across it and they said no leaks.

Last night is rained hard and when I got in the Jeep there was a big puddle on the dash and the headliner from the front of the sunroof to the windshield was wet as well. There is also no wet headliner anywhere else inside the Jeep. Considering the Jeep was sitting and not moving yet the wet headliner reach as far back as the sunroof I am pretty sure that takes the windshield out of the equation. I have no idea where the hell the leak is coming from. It makes 0 sense.
@Dyson350;

If it was my XK, I'd just have the entire sunroof and seals replaced just to take that possibility 100% out of the equation as a possible cause; Short of that, assuming that your front windshield & sunroof seals & drains are good, your next most likely cause is your factory roof rails; That is assuming you have nothing else mounted on the roof or bolted to the roof. I'm guessing each roof rail has 4 or 5 bolts mounting it to the roof.

When the screws/bolts in the roofs rails start to rust the seal they have against the roof will eventually lose it's water-tight integrity and allow water to seep in; this water will typically travel toward your front windshield in between headliner & the roof ; Gravity along with the curvature of the roof always seems to have it travel that way, and eventually it funnels into your A-pillars and you'll see little drops coming out from where the screw hole covers on the grab handle; Or the water could just pool up right there, where your headliner meets the front windshield; Usually it eventually finds its way into the A-Pillars though. It could be on the driver's side or the passengers side, depending on which roof rail has the rusted/corroded bolt or bolts.

Visually inspect your factory roof rails thoroughly for rust & corrosion; if you see any screws/bolts that are rusted or corroded, pull the roof-rail off and replace those screws/bolts and seal the holes with outdoor/all-weather silicone when you tighten them down.

I would also take a good look at your doors, and doors seals and make sure your doors are properly aligned and that your door seals are in tact and in good shape, bad door seals and/or doors that are out of alignment can also allow water to leak in a travel along the roof toward your front windshield.


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Last edited by Big Blue; 05-12-2019 at 01:08 PM.
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post #10 of 20 (permalink) Old 05-12-2019, 01:03 PM Thread Starter
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@Dyson350;

If it was me, I'd just have the entire sunroof and seals replaced just to take that possibility 100% out of the equation as a possible cause; Short of that, assuming that your front windshield & sunroof seals & drains are good, your next most likely cause is your factory roof rails; That is assuming you have nothing else mounted on the roof or bolted to the roof. I'm guessing each roof rail has 4 or 5 bolts mounting it to the roof.

When the screws/bolts in the roofs rails start to rust the seal they have against the roof will eventually lose it's water-tight integrity and allow water to seep in; this water will typically travel toward your front windshield in between headliner & the roof ; Gravity along with the curvature of the roof always seems to have it travel that way, and eventually it funnels into your A-pillars and you'll see little drops coming out from where the screw hole covers on the grab handle; Or the water could just pool up right there, where your headliner meets the front windshield; Usually it eventually finds its way into the A-Pillars though. It could be on the driver's side or the passengers side, depending on which roof rail has the rusted/corroded bolt or bolts.

Visually inspect your factory roof rails thoroughly for rust & corrosion; if you see any screws/bolts that are rusted or corroded, pull the roof-rail off and replace those screws/bolts and seal the holes with outdoor/all-weather silicone when you tighten them down.
Yeah the rails were something I was wondering about, that or the skylights in the back.. But if this were the case and gravity was causing the water to travel towards the windshield I don't understand how the liner in the front of the sunroof would be wet. The water would have to wrap around the sunroof and travel back to the center of the vehicle to get the liner wet were its at atm.
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