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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6477
Location: Brighton


PostPosted: Mon Apr 29, 2019 6:05 pm    Post subject: Condensation in rear lights .. is there a fix ? Reply with quote

I've had a message about this and it got me wondering ..

If the water is left in them for too long then it will damage the electrics and a new unit will be required.

So is there anything that can actually be done as a long term cure ?

My way of thinking and from what i've seen is the reverse section ( clear plastic ) debonds from the rest of the lens allowing water in .

It could also maybe be the outer seal.

We are dealing with gen 1 and 2 here .

So it's damp ..

If it was my car i think i would remove the units and put them somewhere warm to dry out .. an airing cupboard perhaps.

How to stop future problems though ..

My thought would be armourfend over the entire lens .. it would seal it but i'm unsure what it would look like .. again will any heat from the unit discolour it ? i'm not sure ..

Any suggestions please ...
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Magic919
Suzuka


Joined: 05 Jun 2013
Posts: 1085
Location: Berkshire


PostPosted: Mon Apr 29, 2019 7:02 pm    Post subject: Reply with quote

On 997.2 I replace them. Plenty of threads where people discuss drilling holes or wrapping them.
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MattyR
Montreal


Joined: 21 Sep 2015
Posts: 616
Location: Somewhere Nr Tunbridge Wells, Kent


PostPosted: Mon Apr 29, 2019 8:15 pm    Post subject: Reply with quote

Had water in one of my rear lights traced to the centre section curiously delaminating and allowing water ingress. I can’t see a way to fix such an issue TBH. And so I opted to replace Thumb
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James M-S
Österreich


Joined: 11 Apr 2017
Posts: 924
Location: Derbyshire

2009 Porsche 997 Carrera 2

PostPosted: Mon Apr 29, 2019 9:05 pm    Post subject: Reply with quote

Never noticed condensation but in anticipation I have removed the small round stickers on the base of the units to hopefully allow some air circulation/drainage.

I know some have done removed the stickers, dried in an airing cupboard, and then wrapped the lenses using PPF
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 15927
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Apr 29, 2019 9:46 pm    Post subject: Reply with quote

There's a simple fix I've used since owning a Ford Escort MKII back in 1990. Just drill a small hole (talking 1mm....ish) in the top of the light unit. You can do it in the lens and the hole is so small you don't see it unless you look close (and also water doesn't seem to be able to get in through a small hole), or you can do it in somewhere less visible (from the back) so long as you penetrate into where the condensation appears. Keeps the light unit free from condensation and nice and aired.
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monster
Imola


Joined: 04 Sep 2010
Posts: 773
Location: Bournemouth


PostPosted: Tue Apr 30, 2019 12:43 am    Post subject: Reply with quote

Iain, I had this problem with my 997.2 rear lights which are supposed to be a sealed unit. I removed them and tried drying them out but the problem always returned.

So in the end I thought why not try allowing them to vent properly, so I drilled a few holes in the black plastic rear housing of the light assembly and the problem has never returned since - and this was a few years ago with the car having lived outside over a few winters too!
 
  
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MaxA
Barcelona


Joined: 11 Oct 2015
Posts: 1495
Location: Helsinki


PostPosted: Tue Apr 30, 2019 5:51 am    Post subject: Reply with quote

I wrote to deMort about this, in the mistaken belief that there was a fix. In the meantime, can someone point me to a how-to on how to remove/reinstall the rear lights? I plan to dry them out and add some ventilation holes.
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-- 997 --
Suzuka


Joined: 11 Jun 2015
Posts: 1176



PostPosted: Tue Apr 30, 2019 6:02 am    Post subject: Reply with quote

Ok, so with this i was told to take out rear lights and vinyl wrap them with clear film as you would to when wrapping a car, then on the rear of the lights use silicone and apply thinly going around the seal which will protect from any water leaks, also by drilling 3 holes on each unit, 2 above and one below which will allow air in to dry amd in these holes fit a drinking straw in there about half inch long cos if you wash your car water may run down the back of the light and into the hole, with a piece of straw it wont go in!! there have been many revisions of the rear lights cos of faults, the latest revision of the Gen2 rear lights is the situation of condensation/water leaks... by doing the said wrap will help solve the problem. But only doing the when the rear light is dry!! Im yet to do this!!

A porsche technician told me this and works which prolongs the life of the lights!!

Cheers

J
 
  
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Shaoxter
Imola


Joined: 06 Nov 2014
Posts: 823



PostPosted: Tue Apr 30, 2019 7:47 am    Post subject: Reply with quote

MaxA wrote:
I wrote to deMort about this, in the mistaken belief that there was a fix. In the meantime, can someone point me to a how-to on how to remove/reinstall the rear lights? I plan to dry them out and add some ventilation holes.

Open up the engine lid and undo the two torx screws. That's it!
 
  
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MarkC4S
Monza


Joined: 05 Jul 2016
Posts: 184



PostPosted: Tue Apr 30, 2019 8:07 am    Post subject: Reply with quote

I had mine replaced under warrenty and within a few months one suffered the same old problem of condenstation. Now off warrenty so plan to remove and drill holes to improve ventilation. Dry and sunny weather does eventually cause the condensation to go, suggesting that moisture is able to both enter and leave.
 
  
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MaxA
Barcelona


Joined: 11 Oct 2015
Posts: 1495
Location: Helsinki


PostPosted: Tue Apr 30, 2019 8:37 am    Post subject: Reply with quote

Shaoxter wrote:
MaxA wrote:
I wrote to deMort about this, in the mistaken belief that there was a fix. In the meantime, can someone point me to a how-to on how to remove/reinstall the rear lights? I plan to dry them out and add some ventilation holes.

Open up the engine lid and undo the two torx screws. That's it!


Brilliant. I'm still new to working on the Porsche... it's the other car that takes most of the time.
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Magic919
Suzuka


Joined: 05 Jun 2013
Posts: 1085
Location: Berkshire


PostPosted: Tue Apr 30, 2019 5:26 pm    Post subject: Reply with quote

Pulling off the two stickers and the cover on the vent will help them breathe. The later German lights don’t have the problem in my experience.

LED lights will always be prone to condensation, but water sloshing about is a real problem.
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jonno_
Nürburgring


Joined: 29 May 2014
Posts: 377
Location: Oxfordshire

2005 Porsche 997 Carrera 2S

PostPosted: Tue Apr 30, 2019 5:43 pm    Post subject: Reply with quote

MaxA wrote:
Shaoxter wrote:
MaxA wrote:
I wrote to deMort about this, in the mistaken belief that there was a fix. In the meantime, can someone point me to a how-to on how to remove/reinstall the rear lights? I plan to dry them out and add some ventilation holes.

Open up the engine lid and undo the two torx screws. That's it!


Brilliant. I'm still new to working on the Porsche... it's the other car that takes most of the time.


It's even covered in the manual - at least for gen 1.
With the right torx (T25 from memory) it's about 90 seconds for the pair 😁
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6477
Location: Brighton


PostPosted: Tue Apr 30, 2019 7:09 pm    Post subject: Reply with quote

Cheers chaps .. this has answered my question and the guy that asked it i hope Very Happy
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m1kegibson
Newbie


Joined: 15 Dec 2013
Posts: 4



PostPosted: Wed May 01, 2019 12:17 am    Post subject: Reply with quote

I had condensation in drivers side for some time (more than 12m) on my 2009 997.2 and generally it would clear up. About 1 year ago I noticed that it was not clearing and removed the light to find about half a pint of water in there.

There are plenty of reports about water ingress between the different coloured elements that make up the lens so I "filled" the gaps with glue and polished out the marks then refitted. I added a couple of holes for better breathing while I was at it.

However, in the past couple of months, the problem re-surfaced. Only condensation (not full of water). The passenger side also started to exhibit condensation and at that stage I bit the bullet at replaced both lamps.

The model no on my original ones suggests they were those fitted to the car from new (and I have had the car 7 years). The replacements, manufactured in 2018, have a different part no to the originals (different part version no) so may have some subtle design change.

Given the outrageous cost of replacements, it is worth trying all avenues to eliminate water ingress before splashing out on new lamps. If it is genuinely only light condensation, some air holes at the rear may help a bit. I do not believe that the units themselves have any ventilation and are, by design "air-tight".

If you open up the light (remove the screws and the black plastic back), the gasket is a pain to get back (takes a lot of patience) but a replacement is available as part of the reversing light replacement kit (a bulb and a gasket) should you want to replace it.
 
  
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chowgar
Monza


Joined: 09 Aug 2014
Posts: 236
Location: London


PostPosted: Wed May 01, 2019 12:48 am    Post subject: Reply with quote

My other car is a 2017 Golf GTI and not long after getting the car, I noticed the headlights were misting up on occasion, but soon thereafter they were clear. A little research, led me to discover that they have some small holes within them to allow any condensation build up, to dissipate into the air.

It looks like some manufacturers have realised this issue and are now designing light clusters with a preventative measure in place.
 
  
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Paul Farrar
Trainee


Joined: 20 May 2005
Posts: 88
Location: Thruxton, Hants


PostPosted: Wed May 01, 2019 10:21 am    Post subject: Reply with quote

chowgar wrote:
My other car is a 2017 Golf GTI and not long after getting the car, I noticed the headlights were misting up on occasion, but soon thereafter they were clear. A little research, led me to discover that they have some small holes within them to allow any condensation build up, to dissipate into the air.

It looks like some manufacturers have realised this issue and are now designing light clusters with a preventative measure in place.


It's my understanding that 997.2 headlamps units are also 'self-venting', so the occasional condensation clears on its own. Not sure if this is the same with all 997s? However, both of my rear light clusters have been replaced under warranty in the past. Strange that similar venting or draining isn't present in them.....
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Magic919
Suzuka


Joined: 05 Jun 2013
Posts: 1085
Location: Berkshire


PostPosted: Wed May 01, 2019 4:29 pm    Post subject: Reply with quote

The 997 lights have a little breather pipe, but that has a rubber bit and a cap. I left one of them off as a test.
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Martian
Sepang


Joined: 18 Mar 2009
Posts: 2915
Location: Bury St. Edmunds

2007 Porsche 997 Turbo

PostPosted: Wed May 01, 2019 5:18 pm    Post subject: Reply with quote

It's also happening to 991 .1 & .2 models, I saw a few last weekend after the wet and warm(ish) weather in Germany.
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Magic919
Suzuka


Joined: 05 Jun 2013
Posts: 1085
Location: Berkshire


PostPosted: Wed May 01, 2019 6:14 pm    Post subject: Reply with quote

Filling with water or just condensation?
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