C5 passenger side floor wet
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I recommend that you strip out ALL of the interior! Believe it or not, it does NOT take that long and it is not difficult! While it is out, you can find your leak and fix it and you can install some Dynamat or forstking insulation!
Let me know what your thoughts are on that.
BC
Let me know what your thoughts are on that.
BC
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you dont see any during the water test, the HVAC air box may be the cluprit. It wont leak until you run the AC or Defrost for quite a while. Once the condensation level builds up, it will be flood city!
Bill
Bill
Race Director
Joined: Jun 2002
Posts: 12,198
Likes: 15
From: Columbia MD
Originally Posted by Patches
Also very possible your A/C condensation drain tube is clogged. This is quite common. The condensate will back up into your passenger side floor board and soak the carpet. You can reach it from underneath the car. It's just next to the battery tray coming out of the firewall.
Pro
Joined: Jun 2001
Posts: 697
Likes: 0
From: College Station Tx
Originally Posted by Patches
Just wanted to say thanks, Patches! I came back from 2 months out of country and my blower motor was dead - pulled it out and noticed some water backing up; did a search on here and sure enough I had the same problem you described - 1 unobstructed drain valve later and no more issues.
Chris
Melting Slicks
Joined: Jan 2003
Posts: 3,251
Likes: 4
This was a good read. I just checked mine because there seemed to be a scant amount of water under my car today when there should have been more. after pulling off the rubber drain I found debri in there. I snipped off the pinched end but now I can't get it back on from the top of the car. Does it need to be replaced at all? Is the question. If so, it'll have to wait until I get it back on the ramps.
I also sprayed lysol in the vent and it smells better. It was getting a little musty lately.
Should I put the drain back on?
I also sprayed lysol in the vent and it smells better. It was getting a little musty lately.
Should I put the drain back on?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Most of the time the condensation backs up and gets the carpets and jute underlayment on the passengers side wet. The water soaks through the jute and runs to the rear of the carpet under the seat. The jute will start to mildew and stink to high heaven!! The best way to deal with this is to remove the carpet, shampoo the carpet, (I used a Little Green Machine) and let the jute dry out in the sun.
I removed the rubber drain tube on my 98 and must not have put it on good enough. It fell off. One year later it is still off and does not seem to effect the operation of the drain. I would install it because it keeps the water from running down the fire wall and on the exhaust.
Please let us know how you make out.
Bill
I removed the rubber drain tube on my 98 and must not have put it on good enough. It fell off. One year later it is still off and does not seem to effect the operation of the drain. I would install it because it keeps the water from running down the fire wall and on the exhaust.
Please let us know how you make out.
Bill
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Instructor
Joined: Jul 2004
Posts: 108
Likes: 0
From: North Wales PA
The pictures are exceptional, but how in the h$&@ did you get it the little rubber hose out? I've taken my battery out and the plastic surround and still can just barely get my hand back to the hose. What's the trick?
I had the wet interior problem BAD!!!!!!!!!!!!! I had my carpets out more times than I care to mention! 
Once I left the window down during a BAD rain storm! 
Anyway,,,, water can enter the passengers foot well from a number of areas. Looks like you have zeroed in on one of the leak paths. Here are some of the other areas that will give you problems sooner or later!
One is the HVAC air box condensation drain. Patchs has already provided you a detailed drawing so,,,,,,,,,,,,,I will give you a picture of the rubber fitting and some other details.
Here is the fitting and a close up of the crimped area that gets clogged:
If you want to remove the fitting and cut off the crimp (RECOMMENDED) here is where it is (HIGHLIGHTED AREA) on the fire wall. The flashlight beam is shining on the area where the fitting lives.
When this fitting gets clogged, condensation inside the HVAC air box will back up and spill out into the passengers foot well. The BCM will get damp and freak out!
The drivers and passengers side door frame area has a leak path on some C5's. My 2002 Z06 leaked on the drivers side. Here are some pictures of how GM installed some putty to solve the leak problem:
Drivers side upper door hinge.
Here is a picture of the passengers side with OUT any putty. It has not leaked YET!
If your carpets are wet I STRONGLY recommend putting the carpet and jute underlayment in an area where it is warm and dry soit dries out completly prior to reinstallation!
Bill C
Once I left the window down during a BAD rain storm! Anyway,,,, water can enter the passengers foot well from a number of areas. Looks like you have zeroed in on one of the leak paths. Here are some of the other areas that will give you problems sooner or later!
One is the HVAC air box condensation drain. Patchs has already provided you a detailed drawing so,,,,,,,,,,,,,I will give you a picture of the rubber fitting and some other details.
Here is the fitting and a close up of the crimped area that gets clogged:
If you want to remove the fitting and cut off the crimp (RECOMMENDED) here is where it is (HIGHLIGHTED AREA) on the fire wall. The flashlight beam is shining on the area where the fitting lives.
When this fitting gets clogged, condensation inside the HVAC air box will back up and spill out into the passengers foot well. The BCM will get damp and freak out!
The drivers and passengers side door frame area has a leak path on some C5's. My 2002 Z06 leaked on the drivers side. Here are some pictures of how GM installed some putty to solve the leak problem:
Drivers side upper door hinge.
Here is a picture of the passengers side with OUT any putty. It has not leaked YET!
If your carpets are wet I STRONGLY recommend putting the carpet and jute underlayment in an area where it is warm and dry soit dries out completly prior to reinstallation!
Bill C
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Boy,,,,,,,,,,,,,,,, its a tough install. 
If you have headers,, your most likely NOT getting it from the bottom! I used two LONG screwdrivers and worked it off the fitting, cleaned it and worked it back on. Theres DNA in there as I did squeeze my hand in there a few times and repositioned it.
If you dont have headers, from the bottom is s snap!
Bill
If you have headers,, your most likely NOT getting it from the bottom! I used two LONG screwdrivers and worked it off the fitting, cleaned it and worked it back on. Theres DNA in there as I did squeeze my hand in there a few times and repositioned it. If you dont have headers, from the bottom is s snap!
Bill
Cruising
Joined: Jul 2011
Posts: 11
Likes: 0
I have water leaking in on my passenger floor I cleaned the utters under the wiper motor they were clogged shut , ran water thru the cowl panel and. Water poured out thru both sides and no water inside , we had the car on the lift and poked a long screw driver into the a/c drain utter to open it up since I can't get on it due to the headers , after today driving in the 100 degree weather a/c on full blast the floor is soaked and when I make a hard left I hear the water splash around , what do I do next ??? Can I remove the a/c drain cut it and reinstall without any problems
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The HVAC drain is still clogged. Its more than the rubber 90 deg fitting. Pull the fan and feel inside the evap plenum and see if its got crap in it. Theres a small hole that the condensate drain into. It has to be clear>>
Somewhere in that drain pipe,,,, its clogged.
BC
Somewhere in that drain pipe,,,, its clogged.
BC
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
BC
Last edited by Bill Curlee; Jul 25, 2011 at 05:42 PM.
Drifting
Joined: Sep 2009
Posts: 1,862
Likes: 594
From: Prescott, Arizona
I am thinking that the rubber 90 degree elbow comes off from the engine compartment side, but I had trouble getting my hand down there to pull it off. Any suggestions?
In my case, I have no indication that it is plugged, but I would like to take the elbow off an check it.
Thanks
In my case, I have no indication that it is plugged, but I would like to take the elbow off an check it.
Thanks
Cruising
Joined: Jul 2011
Posts: 11
Likes: 0
I guess it would be ok to just leave the rubber end off we could hardly even see it when the car was on the ground or lift but I think I can get something in there to pull it off , going to remove my blower motor and clean that out