Hey guys, i have a 97 civic cx hatch, recently did the power window swap which took longer than i thought, so i pulled up all the carpet, and chucked that. It looked really bad and was cut in the drivers area. Also chucked the rear seats for GSR leather. Im still in the process of dynamat lying. I got the entire trunk with 1 later, then we got hit by 3 days non stop rain. After about 10 min driving my trunk was SOAKED. It got under the dynamat and i had to tear it all up. I thought it was from when i ripped out the spare tire mount, it made a hole clear through. So i patched that all up, and layed 2 layers of dynamat in the entire trunk. Now i went out today because again we had nonstop rain that isnt going to end till sunday .
Again i have about 2'' of water sitting on top of the dynamat. None got under, so its comming from somewhere else. No idea where it is leaking, its pouring right now, and i went out and dont feel anything dripping, no visible water lines. Is there anyway to find exactly where it is leaking? Isnt there something like filling the car with smoke and taking a vaccum to all the seams, and if the smoke comes out is where the leak is? Any other ideas besides having someone on my trunk as i drive in the pouring rain to find the leak?

When it stops raining ill pull the lights but i doubt its leaking from there. No idea, but its not comming from the floor. Also it dosent leak when its just sitting, only when im driving it seems. Becasue i went to work it was dry, it sat in hard rain for over 8 hrs, checked it when i got in, then when i got home i had my entire trunk wet.
Im glad i didnt put any new interior in yet.

 

Someone has got to know. Im so pissed. It did get under my dynamat. I just had to pull out most of my trunk dynamat for the 2nd time now. I probably threw away $80 worth of dynamat already from water getting under it.

 

do you have a sunroof? The sunroof drain is a possibility. also another one is th e molding around your trunk

 

I dont know how to fix it, but all 6th gen hatches have that problem. My old roommates and mine both did it.

 

My frikkin' GSX is doing the same thing lately. I have trophies from showing it, if only the judges knew...

You're going to have to take off ALL of the interior plastics, dry it out completely, then sit and watch for drops all around the body panels, brake light fasteners, etc.

I found 4 leaks from my factory spoiler and brake lights like this. It's a bitch. But it's the only way I could find the leaks. Turns out removing and installing a spoiler or brake lights breaks a factory gasket. Nothing sillycone can't fix.

 

removing everthing is no problem. My car is totally stripped still from installing the dynamat. Nope no sunroof YET!!!

I have no idea, but in mot lying more dynamat until i find it. Im going to pick up some rubber spray and some "great stuff" and fill in all the little areas it could leak from. I thought it was m,y left tail light becasue it is aftermarket but i dont think so anymore.

 

If you go treating the body for leaks without pinpointing the leak first, you're going to make things harder on yourself. You need to see where water's getting in or you'll never plug it up. Get someone to spray all the suspected areas with a hose. That will make it a lot more obvious.

 

I have a 99 Civic hatch with a leaking problem as well. I found the problem to be at the tail lights. Water was coming from the roof through the channel of the hatch, hitting the foam that "seals" of the tailight, and coming right into the car. To check: open the hatch and pour water down the channel. It should take the path that goes around the light and onto the ground. If it comes into the car... there is the problem.

 

I just discovered this same problem yesterday in my '93 hatch.

How did you fix it?