If you'll look in Section 4 ("Fixed Glass") in the Fisher Body Service Manual, you'll see exactly the same process for windshield replacement, except the "dam" wasn't included with the Service kit - masking tape was used instead to control "squeeze-out". That was the plant production process, and explains what is sometimes described as a "rope" being found when an original windshield is removed - the "rope" is the fabric-reinforced rubber "dam" that was applied prior to applying the Thiokol adhesive. The prepared windshield was removed from the rotating fixture, installed in the body opening, and pressed down against the rubber spacer blocks wooden tonque depressors were used to "paddle" the Thiokol around the edges at a 45* angle from the top edge of the glass to the bottom edge of the body opening to ensure a continuous seal all the way around the glass. The spacer blocks set the height of the glass relative to the body to ensure a good fit of the reveal moldings. Lower glass supports were fixture-located and screwed to the cowl, and rubber spacer blocks were glued to the opening flange. The glass periphery was cleaned using a solvent, dried, and a different silane primer was applied.Ī fabric-reinforced self-adhesive foam rubber "dam" was extruded and applied to the glass just inboard of where the Thiokol adhesive would later be applied the purpose of the "dam" was to contain any Thiokol "squeeze-out" so it wouldn't show from the inside past the edges of the interior garnish moldings after the glass was installed to the body.Īfter dam application, pumpable Thiokol adhesive (with a pyramid-shaped cross-section created by the dispensing tip) was applied adjacent to the dam, all the way around the glass. The glass was placed on a powered rotating fixture, inside edge up, retained by suction cups. The body opening flange was coated with black silane primer using a flow-brush 30 minutes prior to installing the glass, and all the reveal molding clips were installed to the Body Shop-installed weld studs. John Hinckley: "GM never used butyl tape or anything like it to install windshields or backlites. If you don't know who he is, here's a little info. Although butyl and urethane are used together by some, they are not compatible.īelow from John Hinckley. It's my opinion a pro should not recommend the use of butyl. Although he is in the business perhaps even he does not know the history of windshield installation. If he wants to use butyl and suggest it that's his right.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |