Thanks to Bill's write up and expert advice once again, I've got this problem resolved. The crazy thing is I had this problem (water in the passenger footwell) the day before my column lock problem and had to get towed home....wasnt that a nice way to start the July 4th weekend!!

I didn't find anything in the loch ness monster tube behind the battery, but I flushed it out anyway. Then after getting my paws on the drain in the firewall, I pulled out what looked to be a piece or two of plastic tape stuck in the little guy. Then, per Dr. Curlee's suggestion, I got a tube, stuck it in the drain hole and attached it to a shop vac....well I pulled out about 1/2 cup or more of water and I haven't had the issue since. The normal 'draining' is back to what it should be.

Thanks again Bill for the great write up, the personal help and tips and ideas. I and many others could not have done it without you.

Best,

GBM

 

Glad you got it fixed!! Any time!!

Bill

 

I took off my A-Pillar Cover and poured water into the channel above the window and my leak is definately coming from there. Its running down the a-pillar onto my drivers side floormat. Its also hitting the Vent for the de-fogger and running down that as well. Im fairly sure the only thing i need to do is remove that molding and re apply some sealant to stop the leak, but i need to know whats involved in doing so. Im pretty handy but im having trouble removing that piece...is there a how-to someone could point me towards?

Thanks,
Alex

 

Nevermind, i got some good advice from Mike69, apparently removing the weather stripping around the door exposes the screws that hold the roof molding on. Im going to remove that and add some sealant and im HOPING that stops my leak issue

 

Please take some pictures of the process that you undertake. Although a number of us know where the leak occurs from and what needs to be done to cure it. None of us have ever undertake the JOB!

You will be a forum pioneer!!!!!!!!

BC

 

Bill,

Unfortunately i didnt get to take any pictures last night as i left my camera at work . I'll try to explain what was involved the best i can though.

My first step was to remove the weather stripping around the door. IT pulls down easily from the roofline but is glued and "push pinned" on either end. This step needs to be done with alot of patience so you dont rip the weatherstripping. Once that is removed there is a metal channel that the weather stripping snaps into thats held on with 9 screws. Once they are removed you'll notice GM used a piece of double sided foam tape to adhere the channel to the plastic behind it, carefully separate the metal channel from the adhesive tape. This can be tricky but i was able to do it without tearing it too bad.

The Double sided tape covers another set of screws that hold on the plastic roof molding, I believe there are 5 of them. Note the location of these screw holes for reassembly. The Plastic trim should pull off easily once the screws are removed, and expose the side of the windshield and roofline. From there i cleaned out some dirt and grime and applied some GM Silastic where i thought it would help and began re assembling everything. It didnt require any special tools but if your not careful you could definately make it worse. The weather stripping around the glass was the hardest part to get 100%, i probably got it to 95% factory (comparing it to the passenger side) It looks like it sealed pretty tight, so im hoping i didnt create more problem areas.

To be honest i still dont know if i fixed the problem or made it worse as i wanted to let the silastic setup before i started poring water on the car. It looks like rain today though so im sure i'll find out if it worked shortly. If it doesnt work my next step will be to purchase all new trim, though i hear that gets expensive.

 

Well turns out i just moved the leak around now instead of leaking on the floor mat its hitting the seat. Looks like i'll be taking it apart again...thank god for packing tape

 

PICTURES!!!!!!!!!!!!!!!!!!!!!:wil ly:


BC

 

How in the heck do you remove that little guy on the firewall behind the engine? I have small hands but DAMN I can't get but one finger on it.

 

are you going after it from underneath?? It's a beaatch thats for sure; try using a long screw driver or similar device to help pry it off from above and see if you can't help get it started. don't push too hard as it's just rubber.

 

I've read through this thread, and am amazed at a) how much good information is available, and b) how many leaks Chevy's flagship is prone to.

I'm not certain if my problem was addressed in this thread. After washing or exposure to rain, while driving my left foot gets dripped on--not a whole lot of water, but I really hate wet socks, and having water, however minimal, coming into the cabin over the clutch pedal isn't good.

I had the left fender off last month, and cleaned out the udders at that time--I only found two, not three.

The car is a 2003 Z06.

Is this something that I missed in the thread and others have dealt with, or do I have a new kind of leak?

Many thanks for your assistance, and kudos to all of you that post your solutions to problems big and small!!!

 

Ive watch GM build Corvettes at the Bowling Green plant. There ALL checked in a torrential down pour booth and IF the car leaked,,,it would have been fixed. Your leak is the result of an accident, improper maintenance, poor house keeping or last but not least,,an error from GM. I agree,,GM does have errors and theres a whole chapter on leaks. There are even Technical Service Bulletins on leaks. If it were a build error from GM,,,it should have been identified during the warranty period.

My recommendation would be to remove the windshield cowl cover and inspect the area at the base of the windshield for damage or sealing issues. Theres a bulkhead seal where the wiper wires go thru the fire wall in the udder well. All that stuff needs to be checked.

Look closely in this area:





Pull the seat and carpets and have someone run water over the hood, then windshield then roof and you look under the dash for leaks

 

Thanks, and will do.
Any recommendations on how to remove the cowl cover?

 

one quick way of knowing is to pull the A pillar cover off and check for moisture/mold on the inside plastic. My leak was coming from where the roof meets the windshield and it would drip into the cover and into the AC vent then down that line into the dash eventually leaking onto my foot.

 

Yep im getting the leak on the dirve side floor and behind my driver side seat. I noticed the weatherstripping is torn. The weatherstripping towards the rear of the seat looks ok, but i don't see where its leaking on the floor back there. I just noticed that today. I used some RTV sealant to make a channel for the dripping on the driverside footwell. Hopefully that fixed that problem. If not im going to have to buy a new driver side weatherstrip. I know they are not cheap either . Plus i also hear a small air leak at certain speeds. I even did the window thing where you loosen the bolt underneath the door. It was all the way moved in. Same as passenger side. It air leaks at high speeds. I hate that the stripping it soooo expensive. Roughly $250 bucks for both sides.

 

Do your self a favor,,,,,,,,REMOVE the drivers side interior and find the TRUE source of the leak. I can tell you 10 things that could be causing your issue but,,,,,,,I would be guessing.

I found ALL my leaks by removing enough interior stuff to see the source of the leak.

Besides,,,,once you have all that stuff out,,,you can clean it AND,,you can install some sound deadening/heat rejection material once you solve the leak issue... (Frost King worked very well for me)

Let me know If i can help.

BC

 

great info

 

ExTurbo,
Have you given it a second go yet? I have the same problem. I attempted to fix the problem by injecting sealant into the front corner of the door "gutter" but it did not work.

 

Listen to this man!!

 

I have one that has me baffled. I sealed the hinges, the large void next to the hinges, made a dam down the doorsill and up to the kick panel. The water is leaking straight down next to where the kickpanel is from under/beside the dash. Any ideas? I think I'm gonna have to remove the glovebox to find it, also the car will sometimes not start, if you unplug and plug the BCM back up it will start. When that happens the radio doesnt work, active handling, abs, service engine all come across the DIC and low fuel even though it isnt. HELP