erratic headlight operation on a 88'
Thread Starter
Racer
Joined: Sep 2004
Posts: 258
Likes: 0
From: Coram NY
erratic headlight operation on a 88'
My buddies 88 coupe, when he turns on the headlights, both headlight
doors open erratic, some times half way, some times 1/4.
What should I look at?
Thanks,
Tom
doors open erratic, some times half way, some times 1/4.
What should I look at?
Thanks,
Tom
Instructor
Joined: Mar 2006
Posts: 107
Likes: 1
From: Concord Twp OH
1988 C4 Floppy Headlight Fix
The culprit is called delrin bushings. There are 3 on each side and are sold as a set (about $7); several of the supporting vendors sell them. In all likihood the gears themselves are fine. The original delrin bushings (rollers) turn into powder after all these years causing the headlights to "flop" around and the motors to spin excessively since they are not properly driving the main gear.
Here is a helpful "Corvette Enthusiast" article that has color photos and step-by-step details on how to replace them.
http://content.madirect.com/pdf/601701article.pdf
It really is not that hard to do; take your time and care; while you have things apart, it is also a great time to clean and lubricate parts that need it. I did this on my 1988 Vert and the headlights operate as new again. All for about $14 in parts and as far as maintenance: a bit of white lithium grease for the output shaft and some 3-in-one-oil for the external linkage mechanism.
Hope this helps.
Here is a helpful "Corvette Enthusiast" article that has color photos and step-by-step details on how to replace them.
http://content.madirect.com/pdf/601701article.pdf
It really is not that hard to do; take your time and care; while you have things apart, it is also a great time to clean and lubricate parts that need it. I did this on my 1988 Vert and the headlights operate as new again. All for about $14 in parts and as far as maintenance: a bit of white lithium grease for the output shaft and some 3-in-one-oil for the external linkage mechanism.
Hope this helps.
Safety Car
Joined: Oct 2007
Posts: 3,816
Likes: 0
From: :45 minutes from everywhere / E-I-E-I-O
Last edited by schrade; Oct 23, 2007 at 08:37 PM.
