Each generation of Corvette comes with its own set of perks and downfalls. In the case of the C3, one of the most commonly experienced problems is the dreaded "lazy eye" headlight syndrome.
Are you accustomed to waiting an extra few minutes for your C3 to warm up before pulling the headlight switch, or simply driving the first several miles of each trip with one light up and the other closed? If so, don't dismay. Many C3 headlight woes can be remedied with a simple vacuum-hose replacement. And even in a worst-case scenario-that of a failed actuator-it should only take around two hours to rectify the problem.
Over the next few paragraphs, we'll walk you through the process of diagnosing and repairing this problem on a third-generation Corvette. Although our subject car is a '79 edition, the information contained herein applies equally to all '68-'82 models.
Begin by tracing all the related vacuum hoses from the actuators to the engine, and inspecting them for cracks, pinches, or holes. If you find any, repairing or replacing the suspect hose could cure your problem. Continue by inspecting the seals on the actuators themselves, repairing or replacing as necessary.
If all of your lines and seals look good, turn on the engine and listen for any hissing sounds emanating from these areas. This could help you track down the location of any hard-to-spot vacuum leaks.
If none of these steps is effective in identifying the problem, it's time to break out the tools. Check out the accompanying photos as we take you through the process.