I've cut out a number of windshields or rear windows over the years. I am talking about the 60's cars where they are in with butyl tape. It has always been in the summer when it's warm though.
I have a possibility of a tinted back glass for my GP. Do I dare try cutting it out when the temperature is right around freezing/melting point, or should I not take the risk and wait until summer.
I can likely make a deal with him now and go back in a few months to cut it out. The guy who has it really doesn't do that kind of work so I can't ask him to be the one to take the chance!
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
piano wire or guitar string, heat the end of the wire with propane torch to insert under glass. then heat a section of the wire and draw thru the butyl, pull out the wire and reheat, repeat as necessary. always good to practice on a windscreen you don't want first.
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pontiax- (canadian pontiac X frame)1964 Parisienne 2dr. Hardtop ,lagoon aqua metallic (Q) ,421 cid Dart Industries block and heads. 550 hp. 575 ft lb of torque.
I've used the piano wire, yes. That works fine. I'm concerned about the butyl being quite rigid and maybe a wrong move will put too much pressure on the glass.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
as a winshield technitian, think i spelt that wrong, any way butyle is nasty stuff i always tried to cut this stuff when its cold, with the proper pull knife. the reason is that butyle resticks itself when its warm, a way to compensate for this is to do a section and then blow some talck into the cut. temperd glass is durable stuff unlike plate glass. what it does like is pinpoint stress like piano wire cutting into it i will shater not break. when you stick it back in use urathane but make sure to bloke it up until it hardens
I find butyl a lot easier to cut than urathane,a lot of the time the stuff isn't stuck worth a hoot. I usually use a pull knife from the outside but an Olfa knife on the inside works well. Take someone with you to apply a little pressure to the inside of of the glass as you cut the glass from the butyl. If you don't have help use plastic windshield sticks or some sort of plastic wedges to hold the glass out a bit as you cut ( don't use anything metal or bye bye window ).
