[DeTomaso] Rear Window Cracked.....again

[cengles at cox.net]

Dear Rob,


            From what little I know.....


            This is the first time I have heard of this problem.  I 
suppose that if the poor Pantera is eaten up with secret rust, then it 
could flex enough to break the glass, but that would a first.   There 
are a lot of rusty Panteras that don't break the rear glass.

            Perhaps there is some abnormality of the manufacturing 
process so that the fit is too tight or that there may be some small 
offending ridge of weld or metal that is stressing the glass.


              I would suggest that the simplest approach would be to 
pull the glass and closely inspect with your glass man and re-install if 
no problems are found.


                                        Warmest regards, Chuck Engles



On Mon, Jul 25, 2016 at 8:22 AM, Rob Dumoulin wrote:

> When I got 1488 eight years ago, the back window was cracked from 
> right
> above where the driver side seat belt mount bolt goes through the back 
> trim
> panel to the roof line. This was a single crack with no side  "spider"
> cracks deviating from it.  I have no theories of how the glass was 
> cracked
> before I purchased the car.
>
> During the restoration, I bought a new gasket and had a piece of 
> automotive
> glass cut using the original as a template and installed by a friend 
> who is
> in the glass business. The car has an adjustable rear cross member 
> brace
> installed over the ZF as many of us have and the car was sitting on 
> jack
> stands with the wheels off for 2 weeks prior to the wheels being
> reinstalled and taken off the stands to put the new windshield and 
> back
> glass in.
>
> The car has been drive on one long trip (to SE Pantera Prez Tim 
> Clinger's
> house), a few docile cruises, and a few sporty ones since the install. 
> No
> major driving events and only a few time in the 90-100 MPH range.
>
> The new back glass cracked again but this time it cracked more inboard 
> from
> the first crack. The new crack starts just above the driver side frame 
> rail
> and has 5 "spider" cracks fanning out from the bottom point of origin 
> to
> the top.
>
> My glass guy says he may have made the fit too tight and will replace 
> it no
> charge. I'm looking for any other theories that could explain it 
> before I
> put another one in and it breaks again.  Is it possible that the car 
> being
> on jack stands could have tweaked the car enough to cause the glass to 
> bind
> as it re-tweaked to its natural state?
>
>
>      ------------------------------
>
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