rear window question
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Senior User
Joined: Oct 2005
Posts: 167
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From: washington, PA
rear window question
Im re doing my 77 f100 and removed the rear window to replace it and the rubber seal and found some rust holes under the rubber. how should I go about fixing this I have the cab gutted at the moment should I cut it ount and weld in a new peice or dose anyone have any other ideas, thanks. I posted in the body work section and no one gave any replys so I thought I would try here, thanks
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Senior User
Joined: Nov 2010
Posts: 264
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From: SWPA
Hard to say without an idea of just where the rust is and it's size. While it sounds like the rubber might hide it, I always try to remove and replace any rusted metal, but sometimes in small areas this can be harder to hide than a simple fix, like filling the holes.
Freshman User
Joined: Jan 2005
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I discovered the same problem on my 79 F100 but didn't recognize how much trouble it could cause .. until I found a hole in the floor of the cab below the rear window.
Post Fiend
Joined: Jul 2004
Posts: 8,786
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From: Northern California
If it's small you can use 3M all around Autobody sealant and caulk. This is made to waterproof factory type seams, and small drill holes. If you are good at welding, then you could weld some small holes or cracks up too, then grind it to shape.
However the proper repair is to remove the whole panel and replace it. The cab is essentially 8 pieces.
1: Roof Section
2/3: The A Pillars
4/5: The B Pillars
6: Backwall under Rear window
7: Firewall
8: Floor section.
Check the seams around each of these sections. If it's old and cracked, remove the old caulking and replace it with 3M all around autobody sealant, or new holes could develop, or is what could have caused the old holes in the first place.
However the proper repair is to remove the whole panel and replace it. The cab is essentially 8 pieces.
1: Roof Section
2/3: The A Pillars
4/5: The B Pillars
6: Backwall under Rear window
7: Firewall
8: Floor section.
Check the seams around each of these sections. If it's old and cracked, remove the old caulking and replace it with 3M all around autobody sealant, or new holes could develop, or is what could have caused the old holes in the first place.
