Thread: Water in both floorboards

So I've been having some water issues. Both floorboards get wet after rain. I did have the sunroof cracked while driving in light rain for a few days last week (rained all week) so maybe that has something to do with it? Maybe someone can possibly suggest something. I'm thinking door seals or something with the sunroof drains leaking or something.
1. The sunroof drains do drain water I blew them out with air and they are clear and ran water down them all 4.
2. AC drain is clear but this last time I never used the ac all week.
3. I have the water deflector already installed over the hvac.
Now the driver side I get water dripping off the pillar inside the car (drips on me while driving ) the first picture showen where it leaks. Also I'm missing the back about 8" of the seal on the top of the door but it's been like that for years and never had a problem as shown in the last 2 pics. So I'm kinda guessing that is part of the problem but I would think the inner seal that goes around the whole door should stop that from dripping?
Waiting for the car to dry out and I'm going jump in and have someone hose it down.

http://www.grandprixforums.net/threa...-Permanent-Fix

Originally Posted by Explicit_Spade

http://www.grandprixforums.net/threa...-Permanent-Fix

You might need some glasses

Sent from my SM-S902L using Tapatalk

time to sit in the car and have someone hose the car down while you sit inside and watch for the leak/leaks. your gonna have to strip some stuff out the way to see, but you knew that already.

Yeah its on the list of stuff to do once it dries. Figured someone might know something I don't about possible solutions.

Sent from my SM-S902L using Tapatalk

you need some one with control running the hose too. you need to start low, then work your way up.

under the driverside cowl could be rusted up too. worth taking the whole cowl off to see.

Honestly....that missing trim on teh drivers door looks concerning to me

You can tape one seam at a time on the outside and watch the inside.

You can turn the fan on high and soap bubble it like a tire.

You can close a slip of paper in the door at different places to see where its loose.

You can buy new door scalp moldings and / or door weatherstrips.

You can lift the back of the door to see if theres play in the hinge resulting in improper door position.

You can confirm or dismiss the many door problems that can cause this issue. PB is funkin or I'd post a pic.

You can use butyl rubber in the form of ribbon sealer inside the flange groove of the door weatherstrip.

You can smoothly trim away the torn part and apply appropriately sized peel and stick round or oval universal weatherstripping along the top of the door.

You can trim the torn part away nicely and apply an appropriately sized 90 degree angled universal vinyl molding to the roof side panel in a manner which allows the door scalp to pass under it with a slight overhang or flush when closed.

Happy hunting!

"you can", do it!

You can do anything through IDJ, who informs you.

I did find a write up for using stick on weatherstrip to fix the top door seal. Those are some good points junk, i did check the doors they didnt have any play which is surprising i thought.

No suprise, its a Pontiac! You have the powah.

Some fancy imports have double door seals that fill the door gap all around. I think a good fitting weatherstrip on the trimmed scalp molding is the best bet for that look. Personally I think the overhang theory would be more durable and better looking, no rubber. Might even work better because it shields the seam rather than relying on surface tension and rubber that your garden hose will blow past. But... If you seal the weatherstrip channel to the pinchweld flange with messy butyl... and your door itself isn't letting it in... answer me how water gets past that if the weatherstrip fits the door!

I should also say that c'mon man... the weatherstrips are old now and will never seal like they were intended to. They can still look good but be flat as Kansas.

Originally Posted by WarStryker13

You can do anything through IDJ, who informs you.

Theres a flipside, several things you can't do. But you can be happy if you've a mind to!

Heres the door shell pic I was gonna put up yesterday. Study hard. On this design, the weather liner seal is critical for keeping water out. Any spots on the bottom front quarter of the butyl bead that are not stuck to the door let water flow right in. It drips from behind the trim panel and drip by drip it goes over (or under) the sill trim.

If it goes over it, there won't be a trail of water, just drips that go straight over the sill and onto top of carpet. If its going under the sill trim you simply can't see it but it goes directly onto wiring and carpet pad sponge. Its just a possibility but a common one. Incoming water from a weatherstrip leak would be coming in up by the kick panel, but this leak ends up below or behind the speaker. See the water marks in pic. There is a deflector of white plastic above the speaker, it deflects water coming in at the belt molding / mirror / front of glass area away from the liner. If that isn't there plus the butyl has a gap, thats a bad leak.

Are the windows rolled up?

Alright so water test, cowl no leaks, doors no leaks, sunroof no leaks, cracked sunroof no leaks, cracked sunroof to get max water through drains no leaks except my grandpa overflowing the drains and getting the headliner and pillar a little wet.

Conclusion is is gotta be coming from the floor. Further investigation shows there patches on either side of the car.

It's exactly where I have holes in both rockers, my theory is that when driving into kicks water up and it seeps past the little tar patch thing which makes sense because when I noticed the water and peeled the carpet back nothing was really up the sides of the car. Here is a pic of the driver rocker and a pic of inside the rocker where you can see the patch thing.


Notice the circular hole. That's where that patch is. Plan is go drive it on a rainy day confirm that's where it's leaking and use probably some tar and other things I can find to redo it.

Sent from my SM-S902L using Tapatalk

I'm looking at the same stuff you are since I'm rehabbing my interior. How much fun was it removing those long bolts holding the trim around the door edges? Man....Mine were rusted on good!! I was working on the passenger and driver floor boards this weekend. Water could be coming in through those tar patches I suppose. Mine were on pretty tight though. I'm experiencing water on both floorboard as well, but coming from the cowl, I'm pretty sure. My car had some extra layer of sound-deadner under the carpet on all 4 floor boards. I chipped away the passenger side and found water under that, and rust, and that stuff smelled really, really awful. Like straight up rot/mold. Chipped it all away, moldy smell gone! Worth looking into since you have the carpet kinda lifted. That's all.... Don't have a solution for your leak, but check for water under that patch of crap while you're at it. Especially if there is a dingy smell in the cabin.

....and PhotoBucket is down for maintenance, can't post photo for reference. Maybe later today.

Yeah stripped the hell out of the bolts. Had to replace them.

Sent from my SM-S902L using Tapatalk

Ok ripped the what seemed like butyl patch off. Gonna try to figure something up to seal the holes. I think I can use rtv an a little metal plate to cover the circular hole and probably just layer some rtv to seal the other hole. Should fix the issue. Just gotta get some black rtv tomorrow.


Sent from my SM-S902L using Tapatalk