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

Mike Drew MikeLDrew at aol.com
Mon Jul 25 16:31:20 EDT 2016 

Definitely should not crack due to jacking. If jacking caused it either the glass is wrong, the channel is defective or the car is flexing due to rust--and you already know the car is solid....

Even rusty cars don't break the back glass. The problem has to lie elsewhere. 

I saw a side glass shatter due to a tiny screw that contacted the glass from the edge. The slightest direct focused pressure on the edge of a windshield or auto glass will shatter it. I broke my new cobra windshield that way, it was ever so slightly larger than the old one which was broken by a rock. Putting it all back together, a screw that didn't touch the old glass touched the new one, and BAM!!!!

Mike

Sent from my iPad

> On Jul 25, 2016, at 1:10 PM, Rob Dumoulin <rob at dumoulins.net> wrote:
> 
>   He pulled the old one out and used it as a template. I can imagine it
>   could have been slightly larger and he said he would cut this one a bit
>   smaller.A  You all have me hoping there may be an easily remedied
>   imperfection in the window channel that caused it.A  Only way to figure
>   it out now is to pull the window back out.A  I'll have that done when I
>   install the Willwoods and adjustable upper rear control arms.
>   Does anybody think it has anything to do with it being on jack stands
>   prior to glass entry. When I do the brakes and rear suspension, it will
>   be back on the same stands.
> 
>   Rob DuMoulin
>   904.476.8744
>   [1]rob at dumoulins.net
>   [2]www.kbsi.co
>   [3]http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
>   On Mon, Jul 25, 2016 at 3:05 PM, L GRAY <[4]tipo874a at msn.com> wrote:
> 
>     The rear glass IS perfectly flat.A  I've changed many of these and
>     the ones guys have cut locally always seem to be cut a tad later
>     than stock.
>     A  A  A What did your guys use for a template?
>     Leslie A. Gray
>> On Jul 25, 2016, at 11:48 AM, Rob Dumoulin <[5]rob at dumoulins.net>
>     wrote:
>> 
>> A  A "I suppose that if the poor Pantera is eaten up with secret
>     rust ... "
>> A  A A
>> A  A We can rule that one out. Not a speck of rust after a full
>     body strip
>> A  A and cavity search, even where the sun don't shine.
>> A  A My glass guy admits he might have cut it too tight and will
>     make it a
>> A  A little looser next time, but these are new gaskets from Roland
>     and I
>> A  A suspect it would have had to have been a really tight fit to
>     begin with
>> A  A to crack.A
>> A  A It was my understanding that the back glass is perfectly
>     flat.AA  Others
>> A  A have implied that may not be the case. If it is supposed to
>     have a
>> A  A slight contour, that could be my problem.
>> A  A Thanks to everybody that responded.A
>> A  A RobA
>> A  A On Mon, Jul 25, 2016 at 9:57 AM, <[1][6]cengles at cox.net>
>     wrote:
>> 
>> A  A  A Dear Rob,
>> A  A  A AA  AA  AA  AA  AA  A From what little I know.....
>> A  A  A AA  AA  AA  AA  AA  A This is the first time I have heard
>     of this
>> A  A  A problem.AA  I suppose that if the poor Pantera is eaten up
>     with
>> A  A  A secret rust, then it could flex enough to break the glass,
>     but that
>> A  A  A would a first.AA  A There are a lot of rusty Panteras that
>     don't
>> A  A  A break the rear glass.
>> A  A  A AA  AA  AA  AA  AA  A Perhaps there is some abnormality of
>     the
>> A  A  A manufacturing process so that the fit is too tight or that
>     there may
>> A  A  A be some small offending ridge of weld or metal that is
>     stressing the
>> A  A  A glass.
>> A  A  A AA  AA  AA  AA  AA  AA  A I would suggest that the simplest
>     approach would
>> A  A  A be to pull the glass and closely inspect with your glass
>     man and
>> A  A  A re-install if no problems are found.
>> A  A  A AA  AA  AA  AA  AA  AA  AA  AA  AA  AA  AA  AA  AA  AA  AA
>     AA  AA  AA  AA  A Warmest
>> A  A  A regards, Chuck Engles
>> 
>> A  A On Mon, Jul 25, 2016 at 8:22 AM, Rob Dumoulin wrote:
>> 
>> A  A When I got 1488 eight years ago, the back window was cracked
>     from right
>> A  A above where the driver side seat belt mount bolt goes through
>     the back
>> A  A trim
>> A  A panel to the roof line. This was a single crack with no
>     sideAA  "spider"
>> A  A cracks deviating from it.AA  I have no theories of how the
>     glass was
> 
>> A  A cracked
>> A  A before I purchased the car.
>> A  A During the restoration, I bought a new gasket and had a piece of
>> A  A automotive
>> A  A glass cut using the original as a template and installed by a
>   friend
>> A  A who is
>> A  A in the glass business. The car has an adjustable rear cross
>   member
>> A  A brace
>> A  A installed over the ZF as many of us have and the car was sitting
>   on
>> A  A jack
>> A  A stands with the wheels off for 2 weeks prior to the wheels being
>> A  A reinstalled and taken off the stands to put the new windshield
>   and back
>> A  A glass in.
>> A  A The car has been drive on one long trip (to SE Pantera Prez Tim
>> A  A Clinger's
>> A  A house), a few docile cruises, and a few sporty ones since the
>   install.
>> A  A No
>> A  A major driving events and only a few time in the 90-100 MPH range.
>> A  A The new back glass cracked again but this time it cracked more
>   inboard
>> A  A from
>> A  A the first crack. The new crack starts just above the driver side
>   frame
>> A  A rail
>> A  A and has 5 "spider" cracks fanning out from the bottom point of
>   origin
>> A  A to
>> A  A the top.
>> A  A My glass guy says he may have made the fit too tight and will
>   replace
>> A  A it no
>> A  A charge. I'm looking for any other theories that could explain it
>   before
>> A  A I
> 
>> A  A put another one in and it breaks again.AA  Is it possible that
>     the car
>> A  A being
>> A  A on jack stands could have tweaked the car enough to cause the
>     glass to
>> A  A bind
>> A  A as it re-tweaked to its natural state?
>> 
>> A  A  A AA  AA  A ------------------------------
>> A  A  A _______________________________________________
>> A  A  A Detomaso Email List is not managed by POCA
>> A  A  A Posted emails must not exceed 1.5 Megabytes
>> A  A  A DeTomaso mailing list
>> A  A  A [2][7]DeTomaso at server.detomasolist.com
>> A  A
>     A [3][8]http://server.detomasolist.com/mailman/listinfo/detomaso
>> A  A  A To manage your subscription (change email address,
>     unsubscribe,
>> A  A  A etc.) use the links above.
>> A  A  A Members who post to this list grant license to the list to
>     forward
>> A  A  A any message posted here to all past, current, or future
>     members of
>> A  A  A the list. They also grant the list owner permission to
>     maintain an
>> A  A  A archive or approve the archiving of list messages.
>> 
>> References
>> 
>> A  A 1. mailto:[9]cengles at cox.net
>> A  A 2. mailto:[10]DeTomaso at server.detomasolist.com
>> A  A 3.
>     [11]http://server.detomasolist.com/mailman/listinfo/detomaso
> 
>> _______________________________________________
>> 
>> 
>> Detomaso Email List is not managed by POCA
>> Posted emails must not exceed 1.5 Megabytes
>> DeTomaso mailing list
>> [12]DeTomaso at server.detomasolist.com
>> [13]http://server.detomasolist.com/mailman/listinfo/detomaso
>> 
>> To manage your subscription (change email address, unsubscribe, etc.)
>   use the links above.
>> 
>> Members who post to this list grant license to the list to forward
>   any message posted here to all past, current, or future members of the
>   list. They also grant the list owner permission to maintain an archive
>   or approve the archiving of list messages.
> 
> References
> 
>   1. mailto:rob at dumoulins.net
>   2. http://www.kbsi.co/
>   3. http://www.linkedin.com/pub/rob-dumoulin/0/1b6/58
>   4. mailto:tipo874a at msn.com
>   5. mailto:rob at dumoulins.net
>   6. mailto:cengles at cox.net
>   7. mailto:DeTomaso at server.detomasolist.com
>   8. http://server.detomasolist.com/mailman/listinfo/detomaso
>   9. mailto:cengles at cox.net
>  10. mailto:DeTomaso at server.detomasolist.com
>  11. http://server.detomasolist.com/mailman/listinfo/detomaso
>  12. mailto:DeTomaso at server.detomasolist.com
>  13. http://server.detomasolist.com/mailman/listinfo/detomaso
> _______________________________________________
> 
> 
> Detomaso Email List is not managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> DeTomaso at server.detomasolist.com
> http://server.detomasolist.com/mailman/listinfo/detomaso
> 
> To manage your subscription (change email address, unsubscribe, etc.) use the links above.
> 
> Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages.

More information about the DeTomaso mailing list