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

[L GRAY]

The rear glass IS perfectly flat.  I've changed many of these and the ones guys have cut locally always seem to be cut a tad later than stock.  
     What did your guys use for a template?

Leslie A. Gray

> On Jul 25, 2016, at 11:48 AM, Rob Dumoulin <rob at dumoulins.net> wrote:
> 
>   "I suppose that if the poor Pantera is eaten up with secret rust ... "
>   A
>   We can rule that one out. Not a speck of rust after a full body strip
>   and cavity search, even where the sun don't shine.
>   My glass guy admits he might have cut it too tight and will make it a
>   little looser next time, but these are new gaskets from Roland and I
>   suspect it would have had to have been a really tight fit to begin with
>   to crack.A
>   It was my understanding that the back glass is perfectly flat.A  Others
>   have implied that may not be the case. If it is supposed to have a
>   slight contour, that could be my problem.
>   Thanks to everybody that responded.A
>   RobA
>   On Mon, Jul 25, 2016 at 9:57 AM, <[1]cengles at cox.net> wrote:
> 
>     Dear Rob,
>     A  A  A  A  A  A From what little I know.....
>     A  A  A  A  A  A This is the first time I have heard of this
>     problem.A  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.A  A There are a lot of rusty Panteras that don't
>     break the rear glass.
>     A  A  A  A  A  A 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.
>     A  A  A  A  A  A  A 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.
>     A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A 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 sideA  "spider"
>   cracks deviating from it.A  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.A  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?
> 
>     A  A  A ------------------------------
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