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Old 05-19-2017, 09:59 AM   #1
AnobleL74
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water leak in cab, under carpet ?

i notice water under my carpet after i go thru car wash, it shows up at bottom of kick panels and under center of floor pans.
there are no water leaks in the car systems.
is it possible the water is coming in thru the cowl vents then down the firewall/kickpanels and under carpet.?
are there seals /drains under vent cowl i can check/repair?
thanks
Allan
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Old 05-19-2017, 10:05 AM   #2
PGSigns
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Re: water leak in cab, under carpet ?

Where under the carpet? Many car washes now have the sprayers the do the bottom of the vehicle. That will allow it to come in in a few places like the clutch pedal pass through and any other place that is low in the floors.
Jimmy
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Old 05-19-2017, 10:09 AM   #3
AnobleL74
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Re: water leak in cab, under carpet ?

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Originally Posted by PGSigns View Post
Where under the carpet? Many car washes now have the sprayers the do the bottom of the vehicle. That will allow it to come in in a few places like the clutch pedal pass through and any other place that is low in the floors.
Jimmy
center of each floor pan and corners where floor meets kick panel
i will look for holes under as you mentioned also
thanks
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Old 05-19-2017, 10:11 AM   #4
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Re: water leak in cab, under carpet ?

Here is a thread on the kick panel vent repair: http://67-72chevytrucks.com/vboard/s...d.php?t=434587
There are drains between the cab and the fender for the kick panel vent. They do get clogged. http://67-72chevytrucks.com/vboard/s...d.php?t=687764
There are sometimes also holes in the floor. http://67-72chevytrucks.com/vboard/s...d.php?t=437306

Last edited by The Rocknrod; 05-19-2017 at 10:16 AM.
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Old 05-19-2017, 01:12 PM   #5
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Re: water leak in cab, under carpet ?

I had leaks like you mentioned and what I found was that on the inside of the fender well where the side kick panel meets the floor board that it is spot welded and also has seam sealer on the joint. Over the years the seam sealer had dried out and some of it had fallen out. When I washed the truck the water would go behind the cowl extension and leak down to the seam and leak on the inside.
I managed to get it chaulked up with out removing the wheel but would have been easier with the wheel off.
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Old 05-19-2017, 03:20 PM   #6
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Re: water leak in cab, under carpet ?

Mine did the same thing. I replaced my vent seals and it fit it.
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Old 05-20-2017, 12:20 AM   #7
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Re: water leak in cab, under carpet ?

In my experience a wet floor is usually a result of a leak around the windshield.
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Old 05-20-2017, 08:36 AM   #8
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Re: water leak in cab, under carpet ?

This is where my leak was :
http://67-72chevytrucks.com/vboard/s...23#post6038323
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Old 05-20-2017, 09:09 AM   #9
AnobleL74
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Re: water leak in cab, under carpet ?

thanks of all the good tips, my kick panels are carpet covered and the vent door assemblies are not there, will remove carpet and seal up the vent openings, see if that helps.i don't need the vents since i have A/C.
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Old 05-20-2017, 10:39 PM   #10
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Re: water leak in cab, under carpet ?

Water in the cab is sometimes from the roof gutters. See if the seam sealer has gone south.
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Old 05-21-2017, 08:11 AM   #11
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Re: water leak in cab, under carpet ?

Also check the firewall where it meets the cab at the top of the firewall, you have to stick your head under the base of the hood, could be rusted and have holes.
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Old 05-21-2017, 10:21 AM   #12
AnobleL74
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Re: water leak in cab, under carpet ?

good ideas, already sealed the roof gutters, they were bad, will now check the firewall area.
thanks
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Old 05-21-2017, 10:42 AM   #13
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Re: water leak in cab, under carpet ?

What did you use for the drip rails?
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Old 05-21-2017, 11:12 AM   #14
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Re: water leak in cab, under carpet ?

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Originally Posted by rvrfoot View Post
What did you use for the drip rails?
mine were in decent shape , some cracking along putty seams, so i just cleaned and rough sanded, then put 2 heavy coats of rustoleum. got a pretty decent paint color match since my truck is patina paint so it worked for me.
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Old 05-21-2017, 10:32 PM   #15
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Re: water leak in cab, under carpet ?

I had the same problem with my 65 Suburban. Drove me crazy trying to figure out where the water was coming from. Finally figured out it was the cowl vents inside. I used a "putty tape" and havent had a leak from them since but lost all my carpet because of the water.
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Old 05-22-2017, 01:41 PM   #16
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Re: water leak in cab, under carpet ?

This is definitely a cowl vent issue. The water is coming in from the air inlet in front of the windshield, then pouring down the inside of these vents. The factory vent has a lip on it to keep the water out.

I modified my vents and first time I washed it...water was puddled up on the floor. Once I sealed these off, never had another drop of water in the cab.

Tom
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Old 05-22-2017, 03:15 PM   #17
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Re: water leak in cab, under carpet ?

Mines got a similar leak but not as bad. Only in heavy rain, there is a slight trickle down the middle of the cab behind the dash. Will investigate the cowl area!

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Old 05-22-2017, 04:07 PM   #18
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Re: water leak in cab, under carpet ?

I took my heater box out and installed a block off plate. I did not put anything on it like weather striping. Mine is leaking from there.
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Old 05-30-2017, 10:16 AM   #19
AnobleL74
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Re: water leak in cab, under carpet ?

my truck has no vents installed, just open holes

any ideas how i can cover and see them off?

vents not used/needed as they are carpet covered and i have A/C

Allan
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Old 06-07-2017, 03:33 PM   #20
AnobleL74
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Re: water leak in cab, under carpet ?

I covered and sealed them still have leak , not coming from there so will try cowl top side area
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