Question about 1985 Chevrolet Corvette

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1985 corvette headlight close but wont open - 1985 Chevrolet Corvette

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  • 25 Answers

I did mine about 3 year ago, C4 headlights are electric motor driven. Clean the contacts, if they are clean, you will have to replace the gears, it's really not hard, just be sure to clean everything as you re- assemble the motor drive. I used synthetic grease. The drive can be unscrewed from the housing and then changing the gears is easy. Most gear sets have directions with them. I got mine from Corvette Central. (about 50 for the set, replace both gears) Be sure to remove any debris.

Posted on Oct 23, 2014

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6ya6ya
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Posted on Jan 02, 2017

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joecoolvette
  • 5660 Answers

SOURCE: one headlight opens and closes slower than the other.

Most of the time you will find that it's rotting rubber hoses. If these have never been replaced, they're 28 years old! Engine heat, exposure to the elements that splash up under the car, and age can rot them.

Also the actuator has a rod that comes out. This rod has a seal around it. The seal rots too. The actuator is the large vacuum cannister, that looks like two pie pans put together. It is down near the headlight. When you have the hood open, look down towards one of the headlights.
Sometimes the vacuum tank develops a hole. This can be patched. It's up on the side of the fender.

Here, let me show you the headlight mechanism,
http://www.mamotorworks.com/corvette-c3-headlight-actuator-linkage-parts-1-249-6088.html
I use this website for my parts, but this is not a link to them for advertisement. It just shows an exploded drawing, so I can explain better.

B is the Headlight Actuator. See the long rod coming out of the middle? Has threads on the end of it? Where the rod goes up into the cannister, there is a rubber seal. This dries out and cracks, and also wears through time. Corvette parts places (At least online I know they do) sell this rubber seal.

There is also a small check valve that can go bad.
You can buy the vacuum hoses in a kit. They are color coded, and have replacement instructions.

To review:
1.Check all vacuum hoses for drying and cracking. Actually squeeze them, don't just look at them. If they have a crack from your squeezing, they're shot! (You might find that some just crumble in your fingers! Oh, by the way. Dawn dishwashing soap, or GoJo takes that black rubber residue off of your fingers)

2.Start the car, let it build up vacuum. Shut the car off, and use the override switch, (Knob under the headlight switch you pull), to keep the headlights in an up position. Put your finger on that actuator rubber seal I described above, and see if you feel a vacuum leak.
If so, replace the seal.

3.It's a good idea to replace the check valve,
http://www.volvette.com/HE76.html

4.It's also a good idea to replace the vacuuum filter,
(Vacuum reserve check valve air filter) http://www.volvette.com/HE75.html


Posted on Apr 18, 2009

  • 1 Answer

SOURCE: Corvette Headlight Motor Problem

Corvettes have a gear box on that motor. It has plastic gears in it. You probably have a gear stripped in that gear box, that lets the motor spin free. You can get repair parts to repair it, or replace the whole motor and gear box. Its an easy fix if your handy. Read all the instructions before you start.

Posted on Jun 22, 2010

  • 2 Answers

SOURCE: 1992 Corvette headlight repair/ replacement Light

Do you hear a clicking noise as if it is trying to close? If so, it may be the gear located in the h/light motor housing that needs replacing. You can purchase these for anywhere from 24.99 - 65.00 each, online. Hope this helped.

Posted on Aug 09, 2010

prostreet 55
  • 299 Answers

SOURCE: i have an 86 corvette,

notorious problem for hideaway lights, needs new motor, had a 86 trans am same problem

Posted on Mar 19, 2011

  • 12 Answers

SOURCE: how to replace headlight switch

The first step is to remove the knob from the metal stem of the switch. Look on the side of the knob and you will find an opening. With a small screwdriver, push to release the tension on the stem and pull it out. Then you have to remove the plastic bezel in front of the instrument cluster. There are screws on the side, so open the drivers door and remove those screws. There are screws around instrument cluster, remove those and several other screws. Remove the plastic bezel, at this point you should remove the threaded washer that holds the switch in place. After that you can remove it from the back. Disconnect the wires, etc. Save the stem as you need to put it in the new switch. Installation is the reverse of what you have done.
Joe.

Posted on Dec 10, 2011

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