water found on rear floor behind driver

[ChrisChow]

My rear floor carpeting behind the driver seat is damp from leaving the car out in the rain over the weekend. Do you guys/gals know where this is coming from. Both my turbo T's exhibited this problem. I can guess it's from the rear window but I wanted to be certain before I start RTV'ing the entire car.

Thanks in advance!

 

[DR BOOST]

is it a astro roof?

 

[CST 03]

Best thing to do is. You sit in the back seat and have someone spray the car with a hose in the area you think the water is coming from. I know it sounds silly but it worked for me.

 

[Smokin-6]

It is probably coming in where the rear part of drivers side door glass meets the weatherstripping. I replaced my original with GM weatherstripping but since I replaced my door springs it does not fit tight against the weatherstrip. So at the top corner water can trickle buy and it rolls down all the way to the floor. I need to adjust the door glass a bit more.

 

[87granny]

It is probably coming in where the rear part of drivers side door glass meets the weatherstripping. I replaced my original with GM weatherstripping but since I replaced my door springs it does not fit tight against the weatherstrip. So at the top corner water can trickle buy and it rolls down all the way to the floor. I need to adjust the door glass a bit more.

Yea i second that spray water on it with a garden hose while your in the car (need 2 people) and you'll probably find the water comming in between the window and seal

 

[asto-t]

I would take back seat out and see if the padding under seat is wet.If it`s wet then its your back window leaking. If your trunk leaks that is a sign the back window is leaking.

 

[toofastforyou]

is it a astro roof?

X2...or t-tops?...

Claude.:redface:

 

[corsair231]

Open your trunk and look at the top corner near the hinge. There is a body seam there with sealer that can crack and let water into the cab of the car. That's where mine was coming from. I skimed over it with silicone and cured my problem. I used the black rtv which blended in and doesn't look too bad when the trunk is open.

 

[daturbosix]

i had a car that did this tooo...

it turned out to be the quarter glass seal.
another car i had leaked at the rear window... that had to be resealed to fix it.

 

[bishir]

My first guess is T-top or Moonroof if you have that. Since it wasn't mentioned, I'll assume you don't.

I too think it's your "opera" or 1/4 window leaking. Most likely it's running under that panel and getting the backseat footwell wet. If the back window is leaking it seems like you could open the trunk and see some wet back seat cushion or remove the back seat and see some water puddled on the floor.

If it is leaking then buy some 3M rope sealer. That stuff is great.

I guess another possiblility if you're driving in wet weather is that water is seaping in through the caps in the floor pan. There are one in each footwell if I recall.

 

[bluezone]

I had the same problem with mine.. The water is coming in fron the vent on the inside of the quarter panel... The drain plugs are clog in the quarter panel...

 

[Bruce Urie]

Best thing to do is. You sit in the back seat and have someone spray the car with a hose in the area you think the water is coming from. I know it sounds silly but it worked for me.

Agree with CST 03 here, only use a hose without a nozzle on the end, let the water run at areas one section at a time while you look for leaks with a powerful flashlight from inside. Use a steady stream of water flow, not blasting flow.

Another trick, before turning on the water, is to sprinkle talcom powder on all the inside edges of the area where your doors close. You can spray a light coat of Pam on the doorjams, then sprinkle with talcom powder or cornstarch. You'll see a nice little water run after testing with the hose (doors closed, of course) if the leak appears anywhere on these areas.

This worked for me, until I looked up and saw that I forgot to put my T-Tops back on.:biggrin:

Bruce '87 Grand National

 

[Adam Connell]

Im dealing with this as well. I've got a hard top car. I went through and double sealed my quarter glass with weather stripping tape. I was amazed at how much this cut down interior noise as well... I got the thinnest self adhesive weather stripping tape i could find which I think was roughly 1/4 thick.

I believe the proper stuff for sealing up the glass is butyl tape. I had a rough time finding it, so I improvised and my solution has seemed to work well.

 

[ChrisChow]

is it a astro roof?

Nope. Solid roof car.

 

[ChrisChow]

Best thing to do is. You sit in the back seat and have someone spray the car with a hose in the area you think the water is coming from. I know it sounds silly but it worked for me.

Before doing so, I'm going to pull out some of the rear panels in the back seat area.

 

[ChrisChow]

Open your trunk and look at the top corner near the hinge. There is a body seam there with sealer that can crack and let water into the cab of the car. That's where mine was coming from. I skimed over it with silicone and cured my problem. I used the black rtv which blended in and doesn't look too bad when the trunk is open.

That's will definitely help with my search. Thank you!

 

[ChrisChow]

The car isn't driven in the rain. It just sat in the rain. So it's probably the opera windows or by the trunk.
The trunk BTW is bone dry.

My first guess is T-top or Moonroof if you have that. Since it wasn't mentioned, I'll assume you don't.

I too think it's your "opera" or 1/4 window leaking. Most likely it's running under that panel and getting the backseat footwell wet. If the back window is leaking it seems like you could open the trunk and see some wet back seat cushion or remove the back seat and see some water puddled on the floor.

If it is leaking then buy some 3M rope sealer. That stuff is great.

I guess another possiblility if you're driving in wet weather is that water is seaping in through the caps in the floor pan. There are one in each footwell if I recall.

 

[ChrisChow]

Time to break out the hose
Thank you for the tip.

Agree with CST 03 here, only use a hose without a nozzle on the end, let the water run at areas one section at a time while you look for leaks with a powerful flashlight from inside. Use a steady stream of water flow, not blasting flow.

Another trick, before turning on the water, is to sprinkle talcom powder on all the inside edges of the area where your doors close. You can spray a light coat of Pam on the doorjams, then sprinkle with talcom powder or cornstarch. You'll see a nice little water run after testing with the hose (doors closed, of course) if the leak appears anywhere on these areas.

This worked for me, until I looked up and saw that I forgot to put my T-Tops back on.:biggrin:

Bruce '87 Grand National

 

[Bweavy]

Driver side rear upper glass has a tendancy to leak there. Pulled enough rear windows to see rust up behind there.

 

[mat231v6]

the two places are the quarter glass or you could have a hole in the floor panel. it’s not uncommon to see a hole back there. It mostly likely is not a hole in the floor panel but it doesn’t hurt to look.