Headlight Noise/knocking
 

So i went to start up the Z to let it run for a little since I haven't driven it in 3 months and when I turn the headlights on than off I hear a knocking coming from the pop up headlights. The headlights turn on and off and rotate properly but when they close I hear a knocking sound? Anyone have this issue or know what the problem is?

Re: Headlight Noise/knocking
 

Sounds like the gears are on the way out.

Re: Headlight Noise/knocking
 

Common C4 issue. Time to replace the 3 plactic bushing cushions in the hub of big drive gear. Plenty of how to articles on the Internet.

Re: Headlight Noise/knocking
 

Gears for sure I replaced mine with updated metal ones.

Re: Headlight Noise/knocking
 

Thanks for tbe advice brothers

Re: Headlight Noise/knocking
 

Corvette Headlight Motor Gear Kit, 1988-1996


http://www.ecklerscorvette.com/corve...1988-1996.html

Re: Headlight Noise/knocking
 

So i read on corvette forums, guy had same issue where the headlights rotated fine but made noise and everyone said if it flips open and closed find it was not gears but the metal balls/bearing that need to be replaced, you can find em from ford window motors. When the salt clears i will take them apart and imvestigate.

Re: Headlight Noise/knocking
 

Hey LI Sounds, i bought my gf that headunit for V Day so i will recommend your shop for install.

Re: Headlight Noise/knocking
 

Like Phil said, it is the 3 plastic bushings that turn to dust. Three needed per side and you are correct, they are labeled for Ford window assembly in the specialty section of Advance Auto. Costs about $6 dollars. This is all you will need.

Re: Headlight Noise/knocking
 

You will have to open it and have it all apart anyway. I would do the gears instead of doing it twice just swap the gears as well just 50 bucks. What happens if you take it apart and the gears are shot as well?

Re: Headlight Noise/knocking
 

Metal upgrade is good for sure but if my gears are fine ill just replace the balls, if both are shot ill get the whole kit

Re: Headlight Noise/knocking
 

It is the plastic rollers inside the gears. Just replaced them on 4 headlights. Gears were in perfect shape but I replaced with plastic gears anyway. The metal gears cost a lot of money. I would stick with plastic. My gears had zero wear. I could have reused them. I would have been pissed if I sprung the extra for the metal gears. The head lights also for some odd reason fail closely together so buy parts for both and use a good plastic compatible grease.