C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

water leak

Thread Tools
 
Search this Thread
 
Old Mar 1, 2014 | 01:45 AM
  #1  
Ralphbf's Avatar
Ralphbf
Thread Starter
Burning Brakes
 
Joined: Feb 2011
Posts: 849
Likes: 0
From: Woodland California
Default water leak

I have a leak that I can not find.

The windows do not leak when I go through a brushless car wash.

But after a rain the floor it wet on the drivers floor board.
Last rain I had an inch or so of water standing.

This is only on the drivers side floor board.

Any ideas?

Ralph
Reply
Old Mar 1, 2014 | 02:31 AM
  #2  
Ibanez540r's Avatar
Ibanez540r
Drifting
Supporting Member
10 Year Member
Liked
 
Joined: Oct 2012
Posts: 1,524
Likes: 61
From: Medina Ohio
Default

Ralph that is not a good sign... Often times it's the indication of a rotted birdcage. Pull the kick panel and see what the #2 body mount pocket looks like. What happens is the windshield frame rotts away, the water then runs down through the birdcage and onto your floor via the #2 body mount pocket.

Hopefully you get lucky and it's t-top seals or something... ?
Reply
Old Mar 1, 2014 | 08:56 AM
  #3  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Can you determne if the water has been dripping (a leak) or whether it backed up through the kick panel vent?
Reply
Old Mar 1, 2014 | 05:02 PM
  #4  
Ralphbf's Avatar
Ralphbf
Thread Starter
Burning Brakes
 
Joined: Feb 2011
Posts: 849
Likes: 0
From: Woodland California
Default

3 years ago the car was stripped down to bare bones.
All the glass removed all the interior removed and painted.
I was told everything looked "good".

I'll check the windshield wiper area first.
is should be the easiest to seal.

thanks

Ralph
Reply
Old Mar 1, 2014 | 05:06 PM
  #5  
Ralphbf's Avatar
Ralphbf
Thread Starter
Burning Brakes
 
Joined: Feb 2011
Posts: 849
Likes: 0
From: Woodland California
Default

Originally Posted by Easy Mike
Can you determne if the water has been dripping (a leak) or whether it backed up through the kick panel vent?
I haven't seen it drip. The water seems to just appear.
I believe it is accumulating from a large area and ending up on the floor.
A little rain puts an unusual amount of water on the floor.

Ralph
Reply
Old Mar 1, 2014 | 05:33 PM
  #6  
stock76's Avatar
stock76
Burning Brakes
15 Year Member
 
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Default

Check to make sure your drain vents are not blocked with leaves or debris.

The water in the windshield wiper tray drains to either side and down the inside of the front fenders and out. If the drain is plugged the water will back up and drain out of the kick panel into the front floor board area.

Use a piece of coathanger or thin screwdriver to clear any blockage from the bottom of the fenders. If there are a lot of leaves or big debris also remove the little plastic side screen (if they are there) from the side of the wiper tray and use a "magic fingers" to run down inside the fender and grab the leaves and pull them out.
Reply
Old Mar 1, 2014 | 06:10 PM
  #7  
georgiaboy's Avatar
georgiaboy
Instructor
10 Year Member
 
Joined: Aug 2010
Posts: 249
Likes: 4
From: Eastern Ky
Default

Originally Posted by stock76
Check to make sure your drain vents are not blocked with leaves or debris.

The water in the windshield wiper tray drains to either side and down the inside of the front fenders and out. If the drain is plugged the water will back up and drain out of the kick panel into the front floor board area.

Use a piece of coathanger or thin screwdriver to clear any blockage from the bottom of the fenders. If there are a lot of leaves or big debris also remove the little plastic side screen (if they are there) from the side of the wiper tray and use a "magic fingers" to run down inside the fender and grab the leaves and pull them out.
Might also check the drain holes in the bottom of the doors.
Reply
Old Mar 1, 2014 | 07:19 PM
  #8  
Ralphbf's Avatar
Ralphbf
Thread Starter
Burning Brakes
 
Joined: Feb 2011
Posts: 849
Likes: 0
From: Woodland California
Default

Originally Posted by stock76
Check to make sure your drain vents are not blocked with leaves or debris.

The water in the windshield wiper tray drains to either side and down the inside of the front fenders and out. If the drain is plugged the water will back up and drain out of the kick panel into the front floor board area.

Use a piece of coathanger or thin screwdriver to clear any blockage from the bottom of the fenders. If there are a lot of leaves or big debris also remove the little plastic side screen (if they are there) from the side of the wiper tray and use a "magic fingers" to run down inside the fender and grab the leaves and pull them out.
Okay I went out and cleaned the windshield wiper area out with compressed air.
I noticed that the factory sealer has hardened and cracked.
It is actually loose in some spots.

So I have found a good place to start. The worst spot is the drivers side.

So what do I use to fix this with?

I plan on removing the loose stuff and redoing everything.
Is that a good idea?

Thanks Guys

Ralph
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-1

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-2

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Mar 1, 2014 | 07:22 PM
  #9  
Ralphbf's Avatar
Ralphbf
Thread Starter
Burning Brakes
 
Joined: Feb 2011
Posts: 849
Likes: 0
From: Woodland California
Default

Originally Posted by stock76
Check to make sure your drain vents are not blocked with leaves or debris.

The water in the windshield wiper tray drains to either side and down the inside of the front fenders and out. If the drain is plugged the water will back up and drain out of the kick panel into the front floor board area.

Use a piece of coathanger or thin screwdriver to clear any blockage from the bottom of the fenders. If there are a lot of leaves or big debris also remove the little plastic side screen (if they are there) from the side of the wiper tray and use a "magic fingers" to run down inside the fender and grab the leaves and pull them out.
This a good idea.
I assume once I start digging down there I can find the vent or should this be done from the bottom?

Ralph
Reply
Old Mar 1, 2014 | 08:27 PM
  #10  
stock76's Avatar
stock76
Burning Brakes
15 Year Member
 
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Default

Originally Posted by Ralphbf
This a good idea.
I assume once I start digging down there I can find the vent or should this be done from the bottom?

Ralph
Once you pry out the curved plastic screens on either side of the tray the wiper arms rest in, it should look like just an open area down the inside of the fender. The plastic screens were put there to stop big debris from washing down and plugging up the weep holes at the bottom underneath of the fenders and causing the water seepage like you describe.

Over time the curved screens may have been taken off and lost or discarded.

Try cleaning out from the bottom up first. You can also take a garden hose or bucket an pour some water in the tray area and see where it goes. If its not draining out at the bottom underside of the fenders but is going into the cockpit, good chance the weep holes are plugged. clear them out with a piece of coathanger wire or thin screwdriver and try again. If water drains out of the weep holes now then your problem is probably solved.

Last edited by stock76; Mar 1, 2014 at 08:29 PM.
Reply
Old Mar 1, 2014 | 10:01 PM
  #11  
joewill's Avatar
joewill
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2007
Posts: 4,458
Likes: 330
From: Indy Indiana
Default

get a helper with a hose and have them spray the windshield area all over while you have you head stuck under the interior dash.. you will find out where the leak is.
Reply
Old Mar 2, 2014 | 04:33 PM
  #12  
Roco71's Avatar
Roco71
Melting Slicks
 
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Default

Originally Posted by Ralphbf
Okay I went out and cleaned the windshield wiper area out with compressed air.
I noticed that the factory sealer has hardened and cracked.
It is actually loose in some spots.

So I have found a good place to start. The worst spot is the drivers side.

So what do I use to fix this with?

I plan on removing the loose stuff and redoing everything.
Is that a good idea?

Thanks Guys

Ralph
Hi Ralph
I used a seam sealer that I bought from Eastwood brushed over the joints it flows out some it dries hard but a somewhat flexible. Then after drying I sprayed the complete tray with a 3M rubber like spray.
Reply
Old Mar 2, 2014 | 05:29 PM
  #13  
georgiaboy's Avatar
georgiaboy
Instructor
10 Year Member
 
Joined: Aug 2010
Posts: 249
Likes: 4
From: Eastern Ky
Default

NAPA carries a seam sealer in a caulking type tube. I use it to seal the seam inside the doors where the fenders meet the body. Thick enough to stay put and plastic enough to mold and spread.
Reply
Old Mar 3, 2014 | 12:28 PM
  #14  
The13Bats's Avatar
The13Bats
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
Default

Once you rule out all the other stuff including the wiper shafts/transmission,
there is a leak that c3's have that many people do not know about, the front fenders have a bonding area at the top back corner/ base of windscreen,

This part has 3 pop rivets and some sealer and sometimes more sealer than others and over time the rivets get play and the sealer dries out,
The leak will be water on the floor it will only show up at odd times like in a car wash or right rain shower, hard to get it going with a hose in the driveway sometimes.

No amount of "goo" or sealer dumped or sprayed down at it will fix it nor can you reach the rivets with dash in car,
These pieces are on the metal of the bird cage and if it's leaking the cage there is rusted, sometimes just surface sometimes way more.

I have seen no other way to fix it right besides pulling the clip or at least hacking the top rear of the fender off and then glassing fender back on after repairs.
Sealing the rivets from inside will not help the rust forming on the metal up there.

After seeing this condition on many c3's I believe that it will happen to 100% of c3's if not restored along the way.
Reply
Old Mar 3, 2014 | 06:52 PM
  #15  
Roco71's Avatar
Roco71
Melting Slicks
 
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Default

Originally Posted by The13Bats
Once you rule out all the other stuff including the wiper shafts/transmission,
there is a leak that c3's have that many people do not know about, the front fenders have a bonding area at the top back corner/ base of windscreen,

This part has 3 pop rivets and some sealer and sometimes more sealer than others and over time the rivets get play and the sealer dries out,
The leak will be water on the floor it will only show up at odd times like in a car wash or right rain shower, hard to get it going with a hose in the driveway sometimes.

No amount of "goo" or sealer dumped or sprayed down at it will fix it nor can you reach the rivets with dash in car,
These pieces are on the metal of the bird cage and if it's leaking the cage there is rusted, sometimes just surface sometimes way more.

I have seen no other way to fix it right besides pulling the clip or at least hacking the top rear of the fender off and then glassing fender back on after repairs.
Sealing the rivets from inside will not help the rust forming on the metal up there.

After seeing this condition on many c3's I believe that it will happen to 100% of c3's if not restored along the way.
Been there and in my case you are 100 percent correct. I had to fabricate new corner pieces cut and weld into place.
Reply
Old Mar 3, 2014 | 07:23 PM
  #16  
The13Bats's Avatar
The13Bats
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
Default

Originally Posted by Roco71
Been there and in my case you are 100 percent correct. I had to fabricate new corner pieces cut and weld into place.
Then you see what I am saying given time if the car isn't restored or repaired there for some reason or another it will leak there....





These were on one of my 81's got lucky and it was just surface rust....
Reply
Old Mar 4, 2014 | 09:51 AM
  #17  
Roco71's Avatar
Roco71
Melting Slicks
 
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Default

Here is what mine looked like after I fabricated a new corner and welded it in place.



After

Reply

Get notified of new replies

To water leak

Old Mar 4, 2014 | 10:46 AM
  #18  
The13Bats's Avatar
The13Bats
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
Default


Keeping my fingers crossed my 69 isnt too rotted there.....your repair is stunning.....
Reply
Old Mar 8, 2014 | 02:57 AM
  #19  
Ralphbf's Avatar
Ralphbf
Thread Starter
Burning Brakes
 
Joined: Feb 2011
Posts: 849
Likes: 0
From: Woodland California
Default

Been waiting on the weather so I could take my first shot at it.
Been raining most everyday here.
I cleaned the wiper gutter out real good and sprayed it with "Flex Seal".

It went on really well and looks real good.
Even if yours doesn't leak this stuff will make it look better than new.

Like I said the old sealer was dry and cracked and this stuff covered it very well. A half of a can did several coats.

Now I need it to rain to see if I got it the first time around.
I'm praying it's that easy.

Ralph
Reply
Old Mar 8, 2014 | 07:06 AM
  #20  
Roco71's Avatar
Roco71
Melting Slicks
 
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Default

Originally Posted by Ralphbf
Been waiting on the weather so I could take my first shot at it.
Been raining most everyday here.
I cleaned the wiper gutter out real good and sprayed it with "Flex Seal".

It went on really well and looks real good.
Even if yours doesn't leak this stuff will make it look better than new.

Like I said the old sealer was dry and cracked and this stuff covered it very well. A half of a can did several coats.

Now I need it to rain to see if I got it the first time around.
I'm praying it's that easy.

Ralph
You can test it with a garden hose.
Reply



All times are GMT -4. The time now is 12:23 AM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-2
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE