How to Install 1969 Mustang Rear Windows

Classic Mustangs manufactured prior to 1969 were built with a rubber gasket surrounding the windshield and rear window. This has caused a problem over the years for owners of the vintage car because the rubber gasket eventually deteriorates and leaks occur. Mustangs built after 1969 have a glued-in gasket that eliminates this problem. Despite this improvement, the rear windows on post-1969 Mustangs may still need to be replaced from time to time because of other damage.

Instructions

1

Clean the edge of the new window glass and the rim of the opening into which the glass will be fitted. The edges and seams must be completely clean and dust-free before you start to install the window to prevent debris from causing imperfections in the seal.

2

Pop out the old retaining clips that held the old window glass in place using a flat-edge screwdriver. Replace and discard the old clips.

3

Apply window sealer all the way around the rim of the rear window opening. Make sure all areas are covered not only to ensure the window adheres properly but also to eliminate air gaps that could allow water to leak through the window seal.

4

Set the rear window glass into position in the window frame.

5

Lift the edge of the rubber window gasket over the window carefully using a screwdriver. Begin at a bottom corner and gradually work your way around. Use the screwdriver carefully to avoid scratching the window or damaging the gasket.

6

Push gently on the window to seat the glass securely in position. Load sealant into the sealant gun and run a bead of sealant around the glass between the window and the rubber gasket.

7

Allow the sealant to dry. Remove any excess sealant with the razor blade.