| [GMCnet] Waterproofing - side windows and cap seams [message #271529] |
Mon, 09 February 2015 17:09  |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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We’ve had a couple of gully-washer storms come through the Bay Area and it’s shown me that my coach is not waterproof. The side window rubbers have shrunken - no surprise, so I thought it’d be an easy job to replace the small rubbers and seal up the windows. But it’s not that simple. When I pulled the old rubber off of the passenger side large window I noticed that the glass has slipped down opening a gap (1/16” or 1/8” maybe?) where no gasket will help. It seems I’ll have to remove and reseal the windows. I see Armand and Jim B’s write up on this and I think it’s all I need, but I’m curious as to why the window slipped down. Any pointers would be appreciated.
Also while finishing the headliner I noted a drip above the dinette seat just behind the passenger seat. I could not see anywhere that the leak was coming from however it is exactly under the cap seam. I haven’t paid any attention to others who have resealed the front and rear cap - but again - any pointers would be GREATLY APPRECIATED!
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Waterproofing - side windows and cap seams [message #271531 is a reply to message #271529] |
Mon, 09 February 2015 17:33  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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For the forward leak, it is most likely one or all of the clearance lights allowing water to pass down the screws or getting under the gasket. JmK has double thick gaskets for the clearance lights. They might do the trick. A good boating shop will have a crack sealer, imported from England that has a thin viscosity and will run down the screws to provide a seal against water going in that direction. Do not use silicon.
The joint between the SMC front cap and the main body may have a leak point also.
Good luck with the leaks. According to my wife, "If it's a GMC, it leaks."
I've been chasing leaks in tis coach for as long as I have owned it. Still have one or two to ind and fix. I've even used a fan to force air out the leak points and soapy water to find them. Auuugh! as Charlie Brown would say.
Do not have any suggestions for the side windows. I replaced all of mine.
Tom, MS II
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2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Waterproofing - side windows and cap seams [message #271555 is a reply to message #271538] |
Mon, 09 February 2015 22:52 |
armandminnie
Messages: 864
Registered: May 2009
Location: Marana, AZ
Karma: 2
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Senior Member |
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Those spacers are just pieces of plastic about 2 inches long each. They hold the glass in place - centered vertically and then just back from the front part of the frame. When you remove the rubber weather strip there is nothing except the vertical center post and some "glue" that is more like a thick grease. You will have to remove the glass, clean up the "glue", use some non-acid-cure RTV as glue (from Jim Bounds) and then replace the glass with the spacers and hold it all in place with the new rubber and the center post. I cut the spacers into about 1/2" pieces so they wouldn't interfere with the new rubber installation. Jim Bounds' instructions and my seminar slides (gmcws.org) should explain it all and Jim is very willing to answer questions in addition to supplying the materials. It is not easy but really not all that difficult.
Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
visit my gmc blog
click here to visit gmcws.org
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