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headlights still will not adjust

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Old Apr 10, 2009 | 07:11 AM
  #1  
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From: seymour 10-e-c
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Default headlights still will not adjust

well
i worked on the headlight adjustment all winter i dissembled the
headlight assembly the bolt was frozen in the plastic gear never
did come loose i have reinstalled them but i have a PLAN if anyone has
a stuck gear and bolt they are going to chuck i would like to have it for an experment email ghammack@charter.net if it works may help a lot of c 5 owners thanks
gorghamak
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Old Apr 10, 2009 | 07:18 AM
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Default

Originally Posted by gorghamak
well
i worked on the headlight adjustment all winter i dissembled the
headlight assembly the bolt was frozen in the plastic gear never
did come loose i have reinstalled them but i have a PLAN if anyone has
a stuck gear and bolt they are going to chuck i would like to have it for an experment email ghammack@charter.net if it works may help a lot of c 5 owners thanks
gorghamak
Reply
Old Apr 10, 2009 | 09:16 AM
  #3  
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AHHH the C5 headlight adjustment..when you see em you just gotta say "JUNK".. With the lens assembly separated from the adjuster insert a small torque screw driver in the end of the "ball" place a socket over the adjuster and turn a litlle each way to free. Then screw it back in toward the car. reattach the lens assembly and attempt to adjust. Too much and it will pop out of the lens assembly. Worst part on the car these adjusters!. be careful the parts are impossible to find and you wind up having to buy assembly. Best of luck
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Old Apr 14, 2009 | 09:32 PM
  #4  
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gorghamak
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From: seymour 10-e-c
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Default

Originally Posted by aleadfoot
AHHH the C5 headlight adjustment..when you see em you just gotta say "JUNK".. With the lens assembly separated from the adjuster insert a small torque screw driver in the end of the "ball" place a socket over the adjuster and turn a litlle each way to free. Then screw it back in toward the car. reattach the lens assembly and attempt to adjust. Too much and it will pop out of the lens assembly. Worst part on the car these adjusters!. be careful the parts are impossible to find and you wind up having to buy assembly. Best of luck
i will take stuck ones if anyone has 1 or 2 for experimene thanks
gorghamak
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Old Apr 14, 2009 | 11:47 PM
  #5  
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Best bet is corvette salage yard and get busted up assemblies. Did you find the torx fitting on top of the adjustment ball on the end of the adjustment screw? The ball fits into the plastic holder in the headlight lens hanger?? Once you find it and hold the adjustment rod with a socket over the outside it will release and screw in. Have you said "junk" yet?
I feel your pain
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Old Apr 15, 2009 | 01:27 PM
  #6  
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gorghamak
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From: seymour 10-e-c
St. Jude Donor '10-'11-'12-'13-'14
Default

Originally Posted by aleadfoot
Best bet is corvette salage yard and get busted up assemblies. Did you find the torx fitting on top of the adjustment ball on the end of the adjustment screw? The ball fits into the plastic holder in the headlight lens hanger?? Once you find it and hold the adjustment rod with a socket over the outside it will release and screw in. Have you said "junk" yet?
I feel your pain
i did find the torx socket and after soaking them all winter in solvent and with torx and holding gear they would still not budge thanks gorghamak
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Old Apr 15, 2009 | 01:58 PM
  #7  
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Default

Originally Posted by gorghamak
i did find the torx socket and after soaking them all winter in solvent and with torx and holding gear they would still not budge thanks gorghamak
This worked for me: Drill four small holes into the shaft (smooth portion) of the plastic gear using a 1/16" or 3/32" drill bit. Two on one side and two more 180 degrees on the other side as well. The drill only goes a short distance before it starts to hit the threaded rod inside so be careful. Spray your favorite penetration lubricant into each hole and let sit awhile. The lube is able to get inside the shaft and loosen or lube the metal threaded adjusting rod inside. I even heated it up with a hair dryer set on high for several minutes and then sprayed some more into the holes. I then used the T15 Torx bit to hold one end of the threaded rod and used the normal E8 socket on the adjuster rod and within a few minutes after soaking and going back and forth, it freed up and started working.

I would strongly recommend dissembling and cleaning the gears, the housing, and the threaded shaft, etc thoroughly and when dry, use Synthetic Brake Caliper Grease (made by Sta-Lube and available at most parts stores) to lubricate the shaft and all moving parts. That particular grease has a combination of moly, Teflon and graphite and is very water resistant and it is "plastic friendly".
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