Water leaking from under the dash?

[McFizzl]

I need to check that cowl thing. I can pull my passenger side cowl up by hand. and my floorpan is wet on passenger side. As well as my cracked windshield leaks from the top.

 

[dawnb]

Having same issue as everyone else....except I have water POURING into passenger floorboard when I go thru a carwash. As soon as carwash soap begins to be sprayed off, I have tons of water & bubbles pouring into truck! In the process of sealing a few cracks I found in cowl (guessing that's how it's spelled). Also found dry rotted weather stripping around middle firewall opening. Hoping this will help the problem some. Cleaned up the cowl, since I had pinestraw stuck in mesh lining. Will try to post pix of replacing the cowl since I could never find pix nor a video showing me how to remove it. It was a b¡tch for me to figure out on my own, so i could check to see if air intake was clogged! Antenna broke off at screw when I tried to twist off....looks like it was badly rusted. That could possibly be one of my leakage problems. Sealed all bolts going into firewall and will do the same for everything going into cowl. Also found missing portions of very small weather stripping located at bottom section of cowl. Looks as if someone had previously "ripped" cowl off and never bothered to repair. Will keep you posted....

 

[jerryjoe28]

i would recomend you lay in the floor watching where you think the water is coming in at and watch it. get someone else to get a water hose (no tip or sprayer) and slowly work their way up from the bottom to the top of the truck.start as low as they can get on the fire wall and work slowly. this should show you where the leak is.

 

[wesalexleft]

2007 driver side water leak

Same problem here. I discovered it a few days ago and today's rain confirmed it. I'm getting water in the driver floor pan. The best I can tell so far is water is coming in from behind the dash above the hood release somewhere. I can't take it apart till the weekend. I'll look toward the cowl first. Anyone with pics to remove the cowl please? Also, was the cowl the source of the leak above? I had front glass replaced, but its been years. This seems to have just started from nowhere unless rain/freezing temps forced something loose. Didn't start until after the last winter storm. Mine does have a sunroof, so I'll check the drains this weekend also I suppose.

 

[2000tahoeZ71]

On the driver and passenger side ends of the cowl panel(the black thing at the base of the windshield) there are smaller black pieces with I think two screws in each one. Take those screws out and place a dab of RTV sealant on them and run them back down. I had a leak that was driving me crazy on the passenger side and this fixed it.

 

[sbubbaklein]

no one has mentioned the drain for a/c condensation. It can become clogged from leaves etc and then overflow and run down the floor pan. There is foam insulation for the carpet. If it is wet above the drain tube it is the windshield. Below indicates a/c.

 

[jerryjoe28]

no one has mentioned the drain for a/c condensation. It can become clogged from leaves etc and then overflow and run down the floor pan. There is foam insulation for the carpet. If it is wet above the drain tube it is the windshield. Below indicates a/c.

x2 and the cowl has drains that become clogged as well and cause the same problem

 

[khigh]

Looks like this thread gets bumped up on a pretty regular basis and for good reason. I'm bumping it up because I'm going to try and diagnose all this tomorrow.

I thought it was something to do with A/C condensation. It's definitely not coolant, but there's a LOT of water on the passenger side.

 

[yargnits]

AC water on floor

I'm not one to use AC that much and when I do I'm not sitting on the passenger side. Yesterday was HOT and I had took the family to the beach. My wife said very cold water would drip on her foot from time to time. So, everything is pointing toward AC drain.

Can anyone give me a place to start looking before I remove a bunch of parts that I don't need to?

 

[SunlitComet]

drain spout maybe plugged. located in engine compartment. right side lower firewall area.