<VV> JOE POTTS windshield install

Frank DuVal corvairduval at cox.net
Wed Jul 14 00:03:50 EDT 2010

I didn't read Mechanic on Duty (not a subscriber), but I can tell you it 
is proper to only use two rubber blocks on a late model windshield, and 
they go at the bottom to keep the glass from sliding down due to the 
force of gravity. They do not have anything to do with the spacing of 
the glass to the pinchweld. That spacing is all determined by the 
thickness of the butyl rubber or urethane, depending on what method the 
shop used.

The rubber blocks are a standard size, and must be cut for certain 
installations. You can tell if the size is correct, as the glass will be 
centered in the opening. Check this before applying butyl tape or 
urethane. If not, it will be a mess! ggg

The thickness of the butyl tape on a late model windshield varies 
between 5/16 and 3/8" depending on the glass thickness. Yes, it varies. 
Measure, measure, measure,     then guess.

BTW this goes for most butyl tape mounted glass, not just late model 

Frank DuVal
many successful glass installations

and a few I want to forget...   gggg

kaczmarek at charter.net wrote:

>I'm reading AUTO RESTORER at work and Joe wrote in to the Mechanic On Duty.
>Apparently a shop replaced his LM Windshield and didn't use the correct rubber blocks, and he's seeing more urethane than he should, and his chrome trim doesn't affix properly.  The shop only used rubber blocks on the bottom  of the windshield frame. 

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