Need a 412 coupe windshield

[ubercrap]

Interesting, I'll have to take a look at some Volvo and Saab windshields in the pull-a-part junkyard...

[albert]

uber , my question was what kind of product i can use for to take the model on my 412 ,, plastic rézin ,,or ????,, do you have suggestion ,,before to go in junk yard for to see what car can do the best job ,, i want to take the most exact possible glass on this différent car ,,albert

[albert]

hi,uber,, i make look in my technik information and i have find new trick for to cut the windshield ,,if you cut one ,, you cut the windshield with good standart glass cutter ,, you do the cut ( dip cut )on the 2 sides and afther you put (alcool or gaz ligther or gaz,, ) in the cutter mark and you put fire for to burn the plastic film in the center and afther you broke the glass samething normal glass many ,,car top chupper ,, can do that for you ,or home glass shop do that sometime ,,

[raygreenwood]

Be very careful that we are all trying to cut the same "types" of glass. In teh USA...all auto glass is "tempered". You cannot safely cut tempered glass. Tempered glass is made in one complete sheet (in this case two layers of glass bonded to a palstic sheet and then tempered) and then tempered. When you break the stress of that sheet.....it shatters.
For a while in the 60's and 70's...not all European glass had to meet teh DOT safety standards of being tempered.

But all of that aside....I have found that the best way to shape or trim tempered glass...at least with the least amount of breakage....was to grind it to shape while keeping teh grind point cool with a liquid coolant.

This is also the same issue on USA DOT spec glass when trying to drill a hole in it like for converting a type 3 standard quarter window to a pop-out. The original popout glass had the hole in it before it was shaped and tempered.

All of the USA safety glass started out as flat sheets in the glass factory. Then joined by the plastic laminate sandwich sheet....then draped over a "buck" or shaping mold and then run through a kiln. As the glass gets hot....it shapes itself to the mold. The rest of the heating and cooling process tempers the glass.

Just be careful. You may be able to shape tempered glass by cutting/grinding...but the risk is that it will eventually crack. Ray

[ubercrap]

Interesting- the Type 4 windshields I don't think were tempered. After cracking that one, I was pissed and hit it with a mallet to try to knock it out of there and it shattered into giant shards just like plate glass. Most of the shards didn't even stick to the laminate very well, especially at the edges where it was cloudy. I'm assuming that some sort of '80s Volvo or Saab winshield would be tempered? Like I said before, I think it would be a miracle of the curve matched up.

[raygreenwood]

There may be some variations. We should compare part #'s. I have broken three over the years. One in an accident. I know all of those were tempered as they shattered into crumbs and cakes.
In general..all glass shipping to this continent from sometime in teh 50's or 60's should have been tempered by DOT regs. But....there may have been quite a bit of gray market.
Also...all of the 411/412 winshields that I know of that were tempered...were marked as such in the logo in the corner. I will look at mine tonight. I also have a brand new NOS rear window with defroster in teh box I can inspect. Ray

[ubercrap]

uber , my question was what kind of product i can use for to take the model on my 412 ,, plastic rézin ,,or ????,, do you have suggestion ,,before to go in junk yard for to see what car can do the best job ,, i want to take the most exact possible glass on this différent car ,,albert

I would be inclined to take detailed measurements first, go to the junkyard to see if something was even remotely close. I suppose the easiest way I could think of to make some sort of measuring device would be to make templates of some sort, maybe profiles out of cardboard? Another thought I had was maybe you could use a heat gun to drape a sheet of acrylic over a windshield to get the shape. Then you lay this sheet over the top of a potential winshield to judge the curvature.

[albert]

thanks ,,uber ,, good trick,, the plexiglass ,, and i was in my scrap yard tooday and i find curious thing for the 412 ,, go to read my ,,info,,drain tube ,,