Quote:
Originally Posted by harit One reason could have been, but need not have been in your case, that the glass was of poor quality and there was some inbuilt tension in it. With age and exposures to heat, these stresses or tensions have caused the glass to shatter. Sometimes you can see these defects in the glass, I have had this in my Amby and Contessa.
There is no remedy, buying an original company approved glass was no solution, most qualities were bad.
President commented about leaving a window slightly open. That is absolutely correct, but this is not restricted to oldtimers. Even today, when my car is parked in the office compound(safe), I leave two windows slightly open. The effect of the hot sun on a closed car is exactly like that of a pressure cooker, it gets hot very fast and reaches higher temperatures. Not very good for the plastics and seat material. But do this at your own risk, a safe place is recomended. Since on this subject, one more tip: when your car stood in the sun, switch on the A/c and open windows for 10 minutes, cooling will be faster.
Cheers harit |
I actually had the front driver side glass slightly lowered. So I guess we can count the pressure cooker effect out. I guess it was probably due to the age of the glass. There was no film on the glass but it was tinted (dark black). I doubt that it was a poor quality glass but the black tint coud be the reason it absorbed so much heat.
I believe there can be a combination of multiple reasons.
1. The glass is not fitted properly and thatc could have created stress/tension in the area where the glass bends (vunrable area for stess applied from the sides).
2. Due to direct heat, the cars metal body will definately expand. Maybe causing more stress on the glass. The expansion may be very little, but will definately have some impact on the glass.
3. The tinted glass absorbing more heat than a clear glass.
And kaput, the glass dissintegrates.
I guess car companies should keep in mind global warming when designing cars now. Quote:
Originally Posted by DHABHAR.BEHRAM Dear Manish - this is known as "suicide of glass" (in the company officially we call it as such) and is caused due to thermal stresses. I have simulated this in the lab. Nothing new. This indicates that summers are getting more and more severe. Just get another glass from the used car market, should not cost you more than 200 rupees or so. By the way, do you have sun film inside the glass or is the glass tinted? Different rates of thermal expansion of both materials can also cause this. That's one of the reasons why no sun film is approved by manufacturers. The third reason could be incorrect mounting / skewed fitment.
By the way, I have picked up a steering wheel for you from the Nasik Chor Bazaar. Please take it when you visit next time.
Best regards,
Behram Dhabhar |
Thank you sir for the stearing wheel. I will pick it up at the next meet.
Is it just the wheel or the complete thing with the plastic column covers?
I am actually going to the security guys to have a look at the survalance video. If I am able to get a copy of the video, I will post it online. Im sure such phenominons are not documented anywhere. Another example of global warming.
I got the car fixed yeaterday evening. Cost me 500 Rs. Its the orignal Safex glass with the PAL logo. Personally I dint like the black glass. The car looks much better now with the clear glass.
Will be putting the Garware Ice cool film on it. I have a large piece left from when I did the front glass.
Thanks again.
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Last edited by Technocrat : 24th April 2009 at 15:35.
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