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Author Topic: moisture in headlight lens, both sides  (Read 3998 times)
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Philster
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« on: May 17, 2011, 06:55:12 PM »

anybody besides me have moisture buildup inside the headlight lens?  I mean, so bad you can smack them with your fist and water bounces off to the bottom of the lens.  Even after a 2 hour trip down the freeway,(not raining), hoping the headlight bulb heat would dissipate it, but noooooooooooo, what gives??
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MOCHANOX
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« Reply #1 on: May 17, 2011, 07:06:03 PM »

Is this on your daughters '06 ?
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2011 LAF 1LT
BCM by GTPprix
1st USA 1LT w/OEM Operated Fog Lamps
RKE All Window Auto Roll Down
RKE Extended Run Time
OEM Courtesy Lamps
Hard Mount/Wired Garmin-coming soon
C.C.P. Pkgs.
Philster
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« Reply #2 on: May 17, 2011, 07:09:47 PM »

yup it is, have an 07 that is doing the same thing on the right side too.
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NoobNox
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« Reply #3 on: May 17, 2011, 07:33:55 PM »

I saw on another forum (dedicated to your first gen Nox) that several people have this issue...something about the way the headlight bezel is two piece iirc. Sorry I don't recall what the fix was but google may be of help..
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2010 Equinox 2LT Silver Ice metallic, 2.4 I4, 2WD, Titanium leather
MOCHANOX
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« Reply #4 on: May 17, 2011, 08:03:17 PM »

A couple things I recall

First and least common and only results in "moisture" as opposed to water is replacing bulbs in high humidity weather.  When the bulb is removed (most GM bulbs twist out) the moist air gets trapped in the housing.  Most late model GM bulb sockets have "O" rings that seal the housing.  This can work with or against you if moist air gets trapped in the housing.

Second and more common, the "RTV" used to seal the front lens to the housing gets "aged" and hardens and cracks allowing water to enter the lamp housing (resuit is actual water in the housing).  A repair can be effected by removing the housing from the vehicle and "gently" heating it in an oven until the two halves can be separated.  Once separated the "old sealant RTV" can be cleaned off and a new bead installed and the two halves put back together.  The key is to use a proper bead size with the new so it neither underfills nor overfills the joints of each half.  Then the two halves need to be taped or rubber banded together until the new "RTV" has cured.  It sounds like a lot of work and you risk overheating the housing if your not carefull...but when you compare the cost of 1 or 2 new housings to a tube of sealer...well...nothing ventured nothing gained

Lastly...impact from a parking lot "incident" from someone "colliding" with your headlamp housing/s can create a hairline crack and/or "bust" the seal between the halves.

As mentioned...google can be your friend for a specific how to...

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2011 LAF 1LT
BCM by GTPprix
1st USA 1LT w/OEM Operated Fog Lamps
RKE All Window Auto Roll Down
RKE Extended Run Time
OEM Courtesy Lamps
Hard Mount/Wired Garmin-coming soon
C.C.P. Pkgs.
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