"How to Adjust a C4 Targa Top"
The C4 Corvette was produced by Chevrolet from 1984 through 1996. Every model year of the C4 was produced with a coupe body style and removable roof panel. The removable roof panel is often referred to as a "Targa top." Several options were available for the roof panel including a solid, painted panel or tinted glass panel. Adjustment of the roof panel may be required when seals are replaced or body damage
1. Park the Corvette on a flat surface and lower both windows.
2. Loosen each of the four Torx retaining bolts used to secure the roof panel to the body. The Torx ratchet, roof removal tool, supplied with the car from the factory should be used to perform this action. Lift the roof panel from the Corvette and store in a safe location.
3. Remove the screws in the center trim panel above the driver and passenger seats. Use a Phillips screwdriver to loosen each of the six screws holding the panel to the body.
4. Locate the two bolts used to secure each of the rear roof retaining assembly. Loosen each bolt with the aid of a wrench to allow a small amount of movement for the roof retaining assembly.
5. Remove both front visors with a Phillips screwdriver. Loosen all of the retaining screws from the front trim panel used to conceal the front roof retaining assembly. Using a wrench, loosen the four bolts securing the front roof retaining assembly.
6. Install the roof panel on the Corvette and adjust the rear edge of the roof panel for a 6 mm gap gap with the rear body panel. Use a tape measure to verify the gap is consistent across the roof panel.
7. Tighten the rear roof assembly bolts using a wrench. Use the Torx wrench to tighten the rear roof retaining bolts.
8. Tighten the front roof assembly bolts using a wrench. Use the Torx wrench to tighten the front roof retaining bolts.
9. Reinstall the trim panels and visors using the Phillips screwdriver.
