The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1967 - 1972 Chevrolet & GMC Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=3)
-   -   Leaking around windshield (https://67-72chevytrucks.com/vboard/showthread.php?t=317115)

70' GMC 12-01-2008 03:02 PM

Leaking around windshield
 
Its also leaking under the dash from a big rain we had in NC. Does anyone have pics of this that may have happened to their truck or even some rough truck builds??? Its real bad on the passengers side and it leaks a little on the drivers side under the dash and around the windshield.

Thanks everyone for all your help.

dave2953 12-01-2008 03:06 PM

Re: Leaking around windshield
 
Mine does the same thing. I was thinking it was a windshield gasket, but when I posted it many members thought there was rot in the area under the gasket. I think they were right. I tried to seal it with clear RTV and it didn't help a bit. Mine only leaked if it rained really hard.

70' GMC 12-01-2008 03:42 PM

Re: Leaking around windshield
 
Quote:

Originally Posted by dave2953 (Post 3002476)
Mine does the same thing. I was thinking it was a windshield gasket, but when I posted it many members thought there was rot in the area under the gasket. I think they were right. I tried to seal it with clear RTV and it didn't help a bit. Mine only leaked if it rained really hard.

it leaks really bad on the passengers side and a decent amount on the drivers side.

Lippyp 12-01-2008 04:02 PM

Re: Leaking around windshield
 
So does mine, I'm going to pull the glass, repair any rust I find and get new rubber. The current one is rock hard and the previous owner has tried to seal it with silicone

Longhorn Man 12-01-2008 04:57 PM

Re: Leaking around windshield
 
While I'm sure it is leaking through the glass gasket, your main leak is probably under the cowl. VERY common for the seam sealer to dry and crack letting lotsa water in. Every truck I've owned had this issue.

oldblue1968chevy 12-01-2008 05:17 PM

Re: Leaking around windshield
 
mine does the same thing..so whats the problem that I should be fixing..

bigguy69 12-01-2008 05:23 PM

Re: Leaking around windshield
 
i have the same thing going on ialso noticed the window gasket falling down in the corners. i think it is rust?

oldblue1968chevy 12-01-2008 05:30 PM

Re: Leaking around windshield
 
my window gaskets fallin off also lol somebody siliconed it up :S

GOPAPA 12-01-2008 07:59 PM

Re: Leaking around windshield
 
[QUOTE=oldblue1968chevy;3002692]my window gaskets fallin off also lol somebody siliconed it up :S[/QUOTE

Might want to take it to a glass shop and have them put some sealer under the gasket . They have the applier that can do this ..I had this done and solved my problem with out removing the window .. papa

heavy71chevy 12-01-2008 09:13 PM

Re: Leaking around windshield
 
mine leaks like a waterfall during rain...I agree with longhorn man totally about the sealer under the passenger side dash.

pat123 12-01-2008 09:18 PM

Re: Leaking around windshield
 
is their anyway to tell if the cab is rusted around the window without taking it out?

skchevota 12-01-2008 10:14 PM

Re: Leaking around windshield
 
Mine was leaking where the antena wire goes in the cab under the cowl. I siliconed it up and the leak was fixed, to bad I found it after it wasted my rocker.

bigsnookmaster 12-01-2008 10:35 PM

Re: Leaking around windshield
 
Sometimes you can take a cotter pin removal tool and gently lift the rubber from the inside and see if there is any rust in the pinchweld area.If there is, it needs to be fixed. My experience has shown that a new gasket is very helpful to fix the problem if it is the gasket,remember these trucks are 40 or so years old.That rubber gets real hard and shrinks and cracks over time.Good luck.:chevy:

70' GMC 12-01-2008 11:22 PM

Re: Leaking around windshield
 
is there any faqs for this area and who has the best patch panels and gaskets for the rusty brittle leaky rubber?????

pat123 12-03-2008 12:03 AM

Re: Leaking around windshield
 
Thanks Bigsnookmaster ill try that

smoked68 12-03-2008 12:29 AM

Re: Leaking around windshield
 
Mine was doing the same, I was sealing something one day and figured what the hay. With finger and black RTV I mushed and smoothed all the way around. No more leaky and looks good too. I love it when a plan comes togeather.

Woody 12-03-2008 08:19 AM

Re: Leaking around windshield
 
There are a couple seams where the cab was pieced together that the seam sealer dries up and cracks, that always leak. They are located under the Cowl and are about 6 inches in from each side. There also are seams above the windshield at the same locations that are prone to leaking. Using Black RTV in a caulk gun to seal around the windshield gasket (inside and outside) helps as well. But truthfully, this is only temperary and sooner or later you need to pull the windsheild and fix the seams and install a new gasket.

70' GMC 12-03-2008 10:04 AM

Re: Leaking around windshield
 
Quote:

Originally Posted by Woody (Post 3005784)
There are a couple seams where the cab was pieced together that the seam sealer dries up and cracks, that always leak. They are located under the Cowl and are about 6 inches in from each side. There also are seams above the windshield at the same locations that are prone to leaking. Using Black RTV in a caulk gun to seal around the windshield gasket (inside and outside) helps as well. But truthfully, this is only temperary and sooner or later you need to pull the windsheild and fix the seams and install a new gasket.

how long does this last????


All times are GMT -4. The time now is 07:29 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com