Re: [DML] Windshield Cracked.

["dmc_5180" <dmc_5180@xxxxxxxxx>]

The reason the windshield cracks is because of the expansion and contraction of the 
BLACK aluminum base when it is glued directly to the glass. Even with normal mirror 
button adhesive.  This is why you MUST  use the black foam Adhesive pad when installing 
the mirror mount. Also the mounting base is much larger than your typical Pressed metal 
mirror mounting button found on most cars that is glued to the glass. This extra contact 
area also contributes to the expantion/contaction process. We al know how hot the inside 
of the car gets when sitting in the direct sun. Black is the worst ofcoarse. It can reach 
temps well over 200 degres. Probably the worst thing is a partly cloudy day. When the sun 
goes in and out as clouds float over the car.  This sets up  heat up and cool down cycles, 
which adds a lot of stress and strain to the glass.


Dennis


--- In dmcnews@xxxxxxxxxxxxxxx, Steve Stankiewicz <protodelorean@...> wrote:
>
> Anybody know why our windshields crack if the mirror's
> glued directly to them when so many other windshields
> are fine?  Thinner/different glass?  The very flat
> design?  (Do similar shaped ones like Lotus require
> the tape-type installs?)
> 
> Just curious,
> 
> Steve
> 
> VIN 2650 ("Project Delorean")
> www.projectdelorean.com
> 
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