classic car installations
Windshield Replacement for the
1967-1979 Ford F-100-350 Series
by Steve Coyle
With the significant technological advances in windshield installation and materials during the past ten years, it can be difficult for a young, newly-minted installer to know how to work on classic cars from the 1950s and 1960s. In an effort to help these installers, AGRR magazine and the Performance Achievement Group will detail an installation of an older car found on Americas highways.
1. Removing the Existing Windshield: Remove the wipers using a wiper removal tool, pulling the wiper arms upward and away from the post.
The windshield and backlite designs use a rubber gasket for installation. To remove the existing windshield in the 1967-76 models, push out on the glass from inside the vehicle while easing the gasket off the pinchweld with a plastic stick or hook tool. Start this process in the upper corner and work your way across the top and down the sides. On the 1977-79, model, Ford redesigned the gasket. Remove the chrome or black filler strips, as well as the corner pieces, from all four sides of the gasket. Push the glass out, leaving the gasket attached to the body. This process may be made easier if one technician pushes from inside the vehicle while a second technician works the gasket over the edge of the glass from the outside.
2.Preparing the Glass & Gasket Assembly:
With the inside surface of the glass facing upward, place the gasket on the replacement glass. You may apply sealant between the glass and gasket before or after placing the gasket on the glass.
Clean the inside surface of the glass before installing it into the gasket that is attached to the body of the vehicle.
If the glass has chrome mouldings, you will need to place the moulding in the gasket before installing the gasket into the vehicle. The chrome moulding is a six-part unit. Two sections across the top and bottom and one section for each side. To install the mouldings into the gasket follow these procedures:
Place the glass (with gasket installed) on a windshield cradle with the outer surface facing upward.
Slide one side of the top moulding into the slot in the gasket, repeat with the other side and join the two in the center. If the ends near the corners do not sit properly, work the gasket over the lip of the moulding from the glass side.
Repeat this procedure for the bottom mouldings.
With the top and bottom mouldings in place, slide the side moulding into the slot starting on the bottom corner of the gasket. The moulding will slide into the top moulding section.
Clip the bottom corner of the side moulding over the bottom moulding and work the remainder of the side moulding into the gasket.
Repeat the procedure for the other side. If the gasket falls off the glass while
installing the mouldings, continue to install the moulding and then place the gasket onto
the glass and tape in place. You may need to tape the gasket onto the glass to prevent it
from falling off the glass during the installation into the
4.Preparing for Installation: Turn the glass over so the inside surface is facing upward.
Place a 1/4- or 3/8-inch rope into the slot in the gasket where the pinchweld will fit, beginning in the bottom-center portion of the gasket.
Insert the rope into this slot around the entire windshield. Overlap the end of the rope a few inches, fold up the rope onto the glass and apply tape to prevent the rope from falling when lifting the glass from the stand.
Apply a small bead of sealant along the outer edge of the gasket where the gasket will contact the vertical portion of the pinchweld. It is also possible to apply the sealant after installing the glass.
5.Installing the Glass:
Lubricate the gasket with water.
Place the full glass and moulding assembly into the opening of the vehicle by placing the bottom edge onto the pinchweld and centering the unit into the opening.
From inside the vehicle, place your arm around the outside of the glass and apply pressure pulling the unit against the pinchweld. Applying suction cups to the inside of the glass and pulling is another option.
With slight pressure applied, begin slowly pulling the rope parallel to the glass and toward the center, being sure that the gasket is moving over the pinchweld and inside the vehicle. Continue this process across the bottom and approximately half way up the side.
Repeat this process on the other side. Be sure that the lip of the gasket has come over the pinchweld.
Next, apply downward pressure on the unit to be sure the bottom is set properly into the pinchweld. Again, apply inward pressure from the outside of the glass and proceed up the side and across the top. You will most likely need to follow the rope with a hook to be sure the gasket is completely over the pinchweld. Continue across the top to the opposite corner.
Now, continue up the remaining side and finally pull the upper corner of the gasket over the pinchweld. You will need to pull on both ends of the rope at this point. Apply pressure from the outside and work the gasket over the pinchweld with a hook or plastic stick in any areas that did not completely set.
Apply sealants between the glass and gasket, and gasket and body, if not done beforehand.
Lubricate the gasket with water.
Place the glass into the center area of the bottom gasket. The large corners of the glass should not be in the gasket.
Starting in the top corner, pull the glass down and carefully place the lip of the gasket over the glass using a plastic stick or hook tool. Use caution, as this is a very tight fit.
After placing the top corner of the gasket over the glass, continue around the bottom corner on the same side. Repeat on the other side.
Finally, finish the top of the gasket. Add sealant and insert filler strip using a locking strip tool.
Install the wipers by setting them on the post and applying downward pressure. Finally, clean and detail the installation. n
Steve Coyle is part of the Performance Achievement Group, an auto glass training company in Madison, Wis.
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