One recurring problem with the lighting systems on late-model Corvettes is the mechanism that operates the headlights rotation. They are operated by an electric motor and have a worm gear, which rides on a plastic gear to turn the headlights up when in use. As a precaution, GM used small plastic bushings inside the gears to act as a buffer for vibration and to smooth the operation of the lights. The problem arises when time begins to wear down the bushings, and they eventually disintegrate into a white powder. These somewhat consumable bushings dont cost much, and changing them can be done in a day with time to spare. With this in mind, there should be no reason for a lazy eye on your Corvette. Follow along as Chris Petris shows us how easy it is to bring your C4s vision back to 20/20.
With the day not even half over, and the fact that the new headlight probably works much better now than the other one, why not take the extra time and do the other side? Youll notice slight differences from one side to the next because GM used the same motor assembly for each side, but they changed the way the motor drive exits the housing. If you start on the driver side, youll notice the difference right away, but the procedure will be the same. The bushings that we used were supplied by Ecklers and are also available through some of the other major Corvette supply houses that advertise in Corvette Fever. For the cost of the parts, it would be wise to buy two sets and do both headlights.
The part number for 88-96 bushings is 37701; for 84-87, replacement gears are PN 26670 (small gear) and A3526 (large gear).