[DeTomaso] Rear Window Cracked.....again
Rob Dumoulin
rob at dumoulins.net
Mon Jul 25 14:47:34 EDT 2016
"I suppose that if the poor Pantera is eaten up with secret rust ... "
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.
It was my understanding that the back glass is perfectly flat. 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.
Rob
On Mon, Jul 25, 2016 at 9:57 AM, <cengles at cox.net> wrote:
> 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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>>
>>
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-------------- next part --------------
"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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