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Water in headlight

Water in headlight

Postby BobK [OP] » Jun 26 2020, 4:55pm

Hi,
Just purchased a 2008 Silverado 1500. The front left headlight has some condensation in it. I just removed both headlights in order to replace all the bulbs and I see a small amount of water in the headlight.

Should I assume there's a leak somewhere in the headlight?

I saw a You Tube video of someone who in order to fix this problem, fills the headlight with water to find the leak, then he uses a vinyl sealant to fix it. Does this make sense?
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Re: Water in headlight

Postby ricka182 » Jun 26 2020, 5:09pm

If you have condensation, you have a bad seal somewhere more than likely. Once it's dry, which means taking it out overnight to ensure it is as dry as possible, you can try running a bead of silicone around the edge, to fill in any gaps that may have developed. There is also the possibility the leak is where the bulbs connects and seals...in that case you could try putting some seal lubricant on, make a better seal, or even cutting and replacing the harness/connector.
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Re: Water in headlight

Postby BobK [OP] » Jun 26 2020, 5:19pm

Thanks Rick,

Makes sense what you suggest.

I tried shaking out the water, I got some out but I still see a decent amount of water in there.

One other idea (not sure if it's good?)- There's another post here that suggests drilling a small hole in the bottom, I guess as a drain. This might be an easy solution - But is that a bad idea to drill a hole?
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Re: Water in headlight

Postby nealinator » Jun 26 2020, 5:23pm

Do you know if they are OEM original housings or aftermarket?

I have used a hair dryer to blow warm air into the light sockets to dry it out. Sealing the perimeter with silicone is the best bet....making sure to get under the areas where there are clips. Any gap can let water in.

I would not drill mine...but I have seen it done.
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Re: Water in headlight

Postby ricka182 » Jun 26 2020, 5:27pm

And remember, unless you had legit small puddle collecting inside, you won't see much. What gets inside is light moisture that builds and condenses on the lens...and that doesn't need a lot of room to seep in slowly, especially during a humid summer.
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Re: Water in headlight

Postby BobK [OP] » Jun 26 2020, 5:36pm

nealinator wrote:Do you know if they are OEM original housings or aftermarket?

I have used a hair dryer to blow warm air into the light sockets to dry it out. Sealing the perimeter with silicone is the best bet....making sure to get under the areas where there are clips. Any gap can let water in.

I would not drill mine...but I have seen it done.


These are stamped Feberg with a 2018 date so it looks like aftermarket replacements. I think I'll go buy silicone sealant. Thanks Neal!
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Re: Water in headlight

Postby BobK [OP] » Jun 26 2020, 5:38pm

ricka182 wrote:And remember, unless you had legit small puddle collecting inside, you won't see much. What gets inside is light moisture that builds and condenses on the lens...and that doesn't need a lot of room to seep in slowly, especially during a humid summer.


Rick I can see a small puddle - it's small but definitely a build up of water.
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Re: Water in headlight

Postby nealinator » Jun 26 2020, 5:42pm

I had some aftermarket ones that kept filling up. Found a section under one of the clips that did not have sealant from the factory. Stopped leaking after that.
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Re: Water in headlight

Postby cverneau » Jun 26 2020, 7:06pm

Do not use SILICONE!!
Always use Butyl Rubber caulk - You can get it in black or clear.
Butyl Rubber will not crack or pull apart from surfaces with the expansion and contraction from heat and cold like silicone will.
You can also use Lexel Adhesive Sealant. It's crystal clear, extremely adhesive and flexible in all temperatures.
I've used Lexel in all aftermarket headlights immediately after removing them from the packaging and before installation.
Never had a problem...
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Re: Water in headlight

Postby nealinator » Jun 26 2020, 7:25pm

I thought silicone was pretty stable? I have used it successfully. It can weather with uv exposure and over time degrade...like most things.
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