Challenges installing side window glass in a C2 coupe

[Gary B.]

When I rolled the window up and down it was immediately obvious that the back end of the sash was scraping against the rear fuzzy channel. I knew this would soon destroy the fuzzy material, so I knew there was no option except to remove the window and sash a second time, and reposition the sash slightly further forward on the glass. Here are some photos showing the position of the glass in the sash at the rear and the front, before I repositioned it,

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Getting the glass out of the original sash was a challenge that took me about two hours. I first sprayed the area liberally with WD 40 where the glass is embedded in glass setting tape within the sash channel, and then I took small, wooden mini-popsicle sticks and gently pounded them between the bottom edge of the glass and the bottom of the sash channel. After my stack of popsicle sticks was 5 thick, the glass started to be pushed out of that end of the sash. Earlier I had pounded in one popsicle stick into the other end of the sash, so that when that back end of the sash pivoted up toward the glass as the front end of the sash pivoting away from the glass, the sharpened edge of the sash would hit the wood and not the bottom edge of the glass.




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I then installed the glass and sash in the door for the third time. The first of the next two photos shows the rear access hole in the inner door surface, with the nut tightened onto the sash stud. The second of the next two photos shows the forward access hole.

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[Garry B.]

Re: Challenges installing side window glass in a C2 coupe

Gary, your timing is perfect for your above excellent recap of what and how you did it. After getting my coupe window channel in and then placing the glass in I too noticed that the end of the window runner was digging into my brand new fuzzy channel. Clearly the glass had moved within its runner groove over the years and was way too far to the rear. I have ordered the tape and have already removed the window (slid right out when I put some Simple Green down into the edges) and cleaned up the channel. I have studied your "old' and new placement markers against the measuring tape, but can't quite make out what those measurements are. It would be of tremendous help if you could give me the specifics of those end measurements so that I can do it one time and hopefully hit the sweet spot for the threaded ends through the correct holes. All I need is how far from each glass end should the runner be? I guess if I get one right the other one will be also. I look forward to your answer. Thanks.
Garry

[Gary B.]

[Gary B.]

Re: Challenges installing side window glass in a C2 coupe

Garry,

There is a tape measure in photos 4 and 5 that you can probably bring out by changing the brightness and contrast.

Gary

[Garry B.]

Re: Challenges installing side window glass in a C2 coupe

Gary, that is exactly what I am going to try to do. It should get me really close. Thanks again for your great recap.

[Gary B.]

Re: Challenges installing side window glass in a C2 coupe

Garry,











Gary

[Garry B.]

Re: Challenges installing side window glass in a C2 coupe

Gary, there is no doubt that someone else has been in this door and window, so it doesn't surprise me with what I have found. I was accustomed to doing C1 windows and those are practically solid cork. This is my first C2 window and I want to do things right. The window literally slid from side to side within the tape. The tape stayed stationary. No matter. I will get it right with your help.

[Garry B.]

Re: Challenges installing side window glass in a C2 coupe

Gary, I sent you an email and a PM. Thanks.
Garry

[Gary B.]

Re: Challenges installing side window glass in a C2 coupe

Your email was in my Junk folder. I just replied to you.

Gary

[Richard M.]

Re: Challenges installing side window glass in a C2 coupe

A 67 convertible I did had a problem, as I believed, from when it was built on the DS window. The glass was not set properly in the sash.

Here's a post with some details. Here & Here.

I used 3M Adhesive remover in the sash to soften the set tape.

Rich

[Gary B.]

[Gary B.]

Re: Challenges installing side window glass in a C2 coupe




The first photo shows the two straight edges I placed along the front and rear edges of the glass to facilitate measuring from that straight edge line to whichever point on the sash would come closest to rubbing either the front or rear fuzzy channel.

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Gary

[Garry B.]

Re: Challenges installing side window glass in a C2 coupe

If you have been following this thread you will know that my '66 passenger side door window was doing exactly as Gary described. In my case I believe the original glass setting tape had aged to the point of allowing the window to actually slide forward in the sash through the force of opening and closing allowing a repositioning of the lower metal portion of the sash to rub against the channel and destroy the fuzzy and it's metal understructure.

Garys' help with the measurements was key to me being able to place the glass in the sash at just the right position allowing me to avoid having to do it over again. It would be easy to make an assumption that the glass should be centered on the sash, but that is not the case. If you are even a 1/16" off, it may be the difference between success and failure. I think the only difference between Garys situation and mine was I have power windows which required me to have my wife "pushing the button" (which she does quite well) when doing the slight adjustments to get the sash back on the track. I also had her hold the tape strap handles for me while putting in the rear channel. A huge shout to Gary for his expertise and generosity in sharing his research with us. I benefitted greatly.