Leaky windshield in my 68 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMJimmy · 10-30-2015, 09:49 PM

Anybody have any ideas how to properly seal a windshield? Brand new gasket and still leaks.
Thanks

Kennuck · 10-30-2015, 10:03 PM

You need to seal the windshield to the rubber and the rubber to the body. Butyl sealant comes in a tube for a caulking gun.

GMJimmy · 10-30-2015, 10:17 PM

Quote:

Originally Posted by Kennuck

You need to seal the windshield to the rubber and the rubber to the body. Butyl sealant comes in a tube for a caulking gun.

I kinda thought I needed sealer but didn't know what kind.
Thanks!

EARNHARDT#3 · 10-30-2015, 10:23 PM

Buy a Precision Rubber brand gasket. Don't use window goo.

**LockDoc** · 10-30-2015, 11:29 PM

-
I never use sealant either. If you have a leak just seal 4 or 5 inches in from each top corner and down the sides about 3 inches. Did you re-seal the body seams that are under the windshield gasket before you put the windshield in?

LockDoc

1972K20 · 10-31-2015, 12:42 PM

LockDoc, are you saying use sealant if it leaks?

GMJimmy · 11-06-2015, 12:09 PM

I'm pretty sure the new seal in there is a Precision. The guy I bought the truck from installed it or had it installed. Don't know for sure. All I know is when it rained last I put a sheet of plastic over the top right corner of the glass and roof to see if I could stop the water from coming in and it didn't work. I'm thinking it's coming in at the top of the gasket all along the whole windshield and running along the inner part of the gasket to the right corner. This isn't just dripping a little, it's coming in about a 1/8 inch steady pour. If you look at the gasket it appears to have a pretty good contact all the way around but on the inside the gasket is puckered at the top right corner. Looks like I'll have to remove it and put a new gasket in there.

69Tom · 11-06-2015, 12:21 PM

As I don't know how nice/restored your truck is, there's always a chance there were some rust holes in the window channel that weren't repaired correctly. I've had that happen on a couple vintage cars.

**Grumpy old man** · 11-06-2015, 10:09 PM

Sounds more like cowl rot /missing body seam sealer rather than a leaky windshield ,Time to get out the good flashlight and crawl under the dash .

72c105speed · 11-06-2015, 10:35 PM

Spray bottle with soap.. Spray suspect area and use an air gun, leaf blower etc from inside to find bubbles (water leak) on outside!

10-30-2015, 09:49 PM	#1
GMJimmy Registered User Join Date: May 2004 Location: Ontario Canada Posts: 164	Leaky windshield in my 68 Anybody have any ideas how to properly seal a windshield? Brand new gasket and still leaks. Thanks

10-30-2015, 10:03 PM	#2
Kennuck Registered User Join Date: Oct 2013 Location: Dresden, Ontario Posts: 647	Re: Leaky windshield in my 68 You need to seal the windshield to the rubber and the rubber to the body. Butyl sealant comes in a tube for a caulking gun. __________________ 1970 Short Wide 5.3 4L60E BlackBear tune 3:73 gears, Boyd's Tank 2.5 / 4 drop 5 lug disc brakes Vintage Air 18x8 Ridlers 255/55 frt. 18x9.5 275/60 rear

10-30-2015, 10:23 PM	#4
EARNHARDT#3 Registered User Join Date: May 2014 Location: PA Posts: 1,417	Re: Leaky windshield in my 68 Buy a Precision Rubber brand gasket. Don't use window goo. __________________ 1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP

10-30-2015, 11:29 PM	#5
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,769	Re: Leaky windshield in my 68 - I never use sealant either. If you have a leak just seal 4 or 5 inches in from each top corner and down the sides about 3 inches. Did you re-seal the body seams that are under the windshield gasket before you put the windshield in? LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

10-31-2015, 12:42 PM	#6
1972K20 Registered User Join Date: Nov 2010 Location: Alabama Posts: 741	Re: Leaky windshield in my 68 LockDoc, are you saying use sealant if it leaks?

11-06-2015, 12:09 PM	#7
GMJimmy Registered User Join Date: May 2004 Location: Ontario Canada Posts: 164	Re: Leaky windshield in my 68 I'm pretty sure the new seal in there is a Precision. The guy I bought the truck from installed it or had it installed. Don't know for sure. All I know is when it rained last I put a sheet of plastic over the top right corner of the glass and roof to see if I could stop the water from coming in and it didn't work. I'm thinking it's coming in at the top of the gasket all along the whole windshield and running along the inner part of the gasket to the right corner. This isn't just dripping a little, it's coming in about a 1/8 inch steady pour. If you look at the gasket it appears to have a pretty good contact all the way around but on the inside the gasket is puckered at the top right corner. Looks like I'll have to remove it and put a new gasket in there.

11-06-2015, 12:21 PM	#8
69Tom Registered User Join Date: Jul 2015 Location: Phoenix, AZ Posts: 1,335	Re: Leaky windshield in my 68 As I don't know how nice/restored your truck is, there's always a chance there were some rust holes in the window channel that weren't repaired correctly. I've had that happen on a couple vintage cars.

11-06-2015, 10:09 PM	#9
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: Leaky windshield in my 68 Sounds more like cowl rot /missing body seam sealer rather than a leaky windshield ,Time to get out the good flashlight and crawl under the dash .

11-06-2015, 10:35 PM	#10
72c105speed Registered User Join Date: Oct 2015 Location: Kentucky Posts: 172	Re: Leaky windshield in my 68 Spray bottle with soap.. Spray suspect area and use an air gun, leaf blower etc from inside to find bubbles (water leak) on outside!



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