slicky rick

have we found a solution to cure this problem. Porsche claims its normal. none of my other cars have this problem so i would rather think the Porsche problem isnt normal. Evertime it rains here and the lights are used headlights fog up in the lower half portion

Minok

Got pics of what this is looking like? Its not July yet, but I'd think the chances to reproduce in the pacific northwest should still be good.'

slicky rick

fog gone now but i will take pics when it comes back. that should be easy as it is the rainy season now where i am.

kosmo

mine doesnt fog.

At Law

My '06 has never fogged. They shouldn't fog at all. Work with the dealer.

slicky rick

i think it has to do with the humidity here. there was actually a tech note on this for the 996's. would have thought that the problem was solved. Cayennes also have it where i am. before porsche tried to solve it with a resealing kit, so they called it. it was essentially a new back cover and a dessicant pouch for each healdight. now Porsche refuses to admit there is a problem with the 997.2 saying that slight fogging is ok. problem only when you see water spots already. they will however replace the heaadlight assembly if there is a problem.

Minok

Essentially, when the headlight is running it heats up the inside of the housing... it gets very warm in there.

When you turn off the headlights, that interior cools down over the next several minutes, and as it does, the air pressure in there drops below the atmospheric pressure, and pulls in air from the outside.

If you are in a humid region, that air will be humid... and could then condense.

Why is it happening on the Porsche headlight assemblies and not other cars is the question? Maybe the headlights are too well sealed so that the water vapor cannot evaporate out and is just trapped?

Betternotbigger

They all do that, sir...

Carrara

It's normal. Porsche's headlights have very small slits in them which allow condensation to form.

slicky rick

i should not think that it is normal because eventually the condensation causes black spots to form on the lenses. and if we are even thinking of keeping our cars for a long time this wont be acceptable!!! i had mine for a year and black spots started to appear wow can you imagine how these supposedly expensive lights would look after 10 years. your going to hate it!

91469972

When my Q7 light fogged Audi replaced immediatly. I can't believe Porsche lights have slits if so they would fog all the time in the southern states!

808997

My Subaru headlight fogged up once after taking it through a car wash and stayed fogged for several weeks afterwards. The state inspection folks wouldn't pass it because of this. One garage wanted $200 to fix it and the dealer wanted $400. 5 minutes with a hair dryer and the bulbs pulled out (so the condensation could come out) took care of that problem.

808997

My Subaru headlight fogged up once after taking it through a car wash and stayed fogged for several weeks afterwards. The state inspection folks wouldn't pass it because of this. One garage wanted $200 to fix it and the dealer wanted $400. 5 minutes with a hair dryer and the bulbs pulled out (so the condensation could come out) took care of that problem.

slicky rick

808997 is totally right! i pulle dout the headlights and placed it under the searing heat of the sun with the backside open. after a while pulled out the hair dryer and proceeded to blow hot air into the unit just to make sure all moisture is gone. closed up the unit. waited for the rain. when it did rain trned on the lights just to see if moisture would agian reappear. NO more!!!

Minok

So it sounds like somehow, at some point, moisture got inside the housing and was trapped. Apparently just drying it out good once (no need to bake it necessarily), cooling it down in a dry place and the resealing and reinstalling is all it takes.