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Best way to seal a leaking passenger side window [message #282700]

Tue, 21 July 2015 12:41

Scott Nutter

Messages: 782
Registered: January 2015
Location: Houston/San Diego

Karma: 4

Senior Member

Hello,

I have a leaking passenger side window, I don't know exactly where the leak is, but I assume it's the frame seal. What would be the best way to seal this leak? A bead of sealer or pull out the window and put in a new frame seal? I have never pulled a window on a GMC, so I hope that the sealer would do the trick. But I also want it fixed correctly, so I might have to pull the window. Any suggestions? Thank you...

Scott Nutter 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI Houston, Texas

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Re: [GMCnet] Best way to seal a leaking passenger side window [message #282704 is a reply to message #282700]

Tue, 21 July 2015 12:58

Nelson

Messages: 120
Registered: August 2014

Karma: 0

Senior Member

First I would make sure that the leak is from the window. One way is to pressurize the coach and spray soapy water on the exterior and look for bubbles. Another way is to seal the exterior window frame to the body with electrical tape and apply water.
HTH
Nelson Wright
78 Royale rear bath
Belle isle Fl and Nantahala NC

Sent from my iPad

> On Jul 21, 2015, at 1:41 PM, Scott Nutter wrote:
>
> Hello,
>
> I have a leaking passenger side window, I don't know exactly where the leak is, but I assume it's the frame seal. What would be the best way to seal
> this leak? A bead of sealer or pull out the window and put in a new frame seal? I have never pulled a window on a GMC, so I hope that the sealer would
> do the trick. But I also want it fixed correctly, so I might have to pull the window. Any suggestions? Thank you...
> --
> Scott Nutter
> 1977 Palm Beach
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

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Re: Best way to seal a leaking passenger side window [message #282705 is a reply to message #282700]

Tue, 21 July 2015 13:01

lw8000

Messages: 201
Registered: July 2012
Location: S.E. Michigan

Karma: 1

Senior Member

Not sure if you have the same issue or not, but are you certain water is coming in at the window? The reason I mention it, is that we had a leak near the lower rear corner of that window and it caused the step to rot out at the wall. We caulked the window and it still kept leaking... so we finally found that the leak wasn't the window, but through a tiny crack in the seam of the body that runs right behind that window. Visibly it looked OK, but water managed to find its way in there. Not to mention, the upper track drains right down there which probably added more water to the problem. We used polyurethane sealant and never a problem since. In fact, I've gone through and did the same for all of the other body seams, as I think the same problem happened at the very back of the coach and rotted out the lower side cabinets. We used:

both found at Home Depot. The nice thing about this stuff is it cures to a very strong rubber type consistency, and is paintable. There were some posts about this stuff previously right here in the forum, which is where we learned of it.

Good luck!

Chris S. - 77 Kingsley, 3.70 FD, mostly OEM - S.E. Michigan

[Updated on: Tue, 21 July 2015 13:03]

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Re: Best way to seal a leaking passenger side window [message #282766 is a reply to message #282705]

Wed, 22 July 2015 00:43

Scott Nutter

Messages: 782
Registered: January 2015
Location: Houston/San Diego

Karma: 4

Senior Member

Nelson

I understand what your saying. And it's a great idea. How would I pressurize the cabin of a motorhome? I don't have packs, bleed valves, apu, let alone a closeable outflow valve.
Only thing I can think of would be to duct a leaf blower to the inside of the motorhome, and somehow seal all the other leaks. I guess it could be done, but that sounds like a lot of work. How would you pressurize the cabin? Thanks

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Re: [GMCnet] Best way to seal a leaking passenger side window [message #282770 is a reply to message #282766]

Wed, 22 July 2015 04:25

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

Read here
http://gmcmotorhome.info/body.html#leaks
And here
http://www.gmcmhphotos.com/photos/miscellaneous/p8058.html

Erf

On Tuesday, July 21, 2015, Scott Nutter wrote:

> Nelson
>
> I understand what your saying. And it's a great idea. How would I
> pressurize the cabin of a motorhome? I don't have packs, bleed valves, apu,
> let
> alone a closeable outflow valve.
> Only thing I can think of would be to duct a leaf blower to the inside of
> the motorhome, and somehow seal all the other leaks. I guess it could be
> done, but that sounds like a lot of work. How would you pressurize the
> cabin? Thanks
> --
> Scott Nutter
> 1977 Palm Beach
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] Best way to seal a leaking passenger side window [message #282771 is a reply to message #282766]

Wed, 22 July 2015 05:12

powerjon

Messages: 2446
Registered: January 2004

Karma: 5

Senior Member

This is the unit that I have for leak checking the body/window/etc for leaks.

http://www.gmcmhphotos.com/photos/g6110-leak-check-air-blower.html

JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCGL Tech Editor
GMCMHI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan

> On Jul 22, 2015, at 1:43 AM, Scott Nutter wrote:
>
> Nelson
>
> I understand what your saying. And it's a great idea. How would I pressurize the cabin of a motorhome? I don't have packs, bleed valves, apu, let
> alone a closeable outflow valve.
> Only thing I can think of would be to duct a leaf blower to the inside of the motorhome, and somehow seal all the other leaks. I guess it could be
> done, but that sounds like a lot of work. How would you pressurize the cabin? Thanks
> --
> Scott Nutter
> 1977 Palm Beach
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan

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Re: [GMCnet] Best way to seal a leaking passenger side window [message #282773 is a reply to message #282771]

Wed, 22 July 2015 07:09

tphipps

Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL

Karma: 9

Senior Member

Not difficult to remove and reinstall the side windows. If you have a cabinet over the window, it must be removed, only hassle. Remove the corner plastics covers, slide the straight pieces off, take the screws out of the aluminum pieces that hold the window in place. Have help removing the window, it is heavy. I have found that the two headed suction cup device from Habor Freight makes handling the window easier. Scrape the old seal material off.
Add butyl tape to the window opening, and reverse the process.
I have done 13 of these side windows in this sequence and it works for me.
Tom, MS II

2012 Phoenix Cruiser model 2552 KA4CSG

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Re: Best way to seal a leaking passenger side window [message #282775 is a reply to message #282700]

Wed, 22 July 2015 07:26

kerry pinkerton

Messages: 2565
Registered: July 2012
Location: Harvest, Al

Karma: 15

Senior Member

Here is a link to a seminar on removing and repairing cockpit windows:

http://www.gmcmi.com/wp-content/uploads/2014/11/Repairing-and-rebuilding-cockpit-windows-GMCMI.pdf

After all that, I still have a small leak that I now think is the running lights which are on the list for replacement.

Kerry Pinkerton - North Alabama Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L

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