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stefant
Trainee


Joined: 14 Jan 2017
Posts: 58



PostPosted: Tue Jan 30, 2018 8:02 am    Post subject: Condensation... Reply with quote

Hi there,

I have noticed that I seem to be getting a lot of condensation on the front and rear windows of my 996 Targa recently, maybe it has always been like that I have only just noticed.

Before I start the search for a leak, is it normal to get condensation when parked up over night outside. I am used to new cars that don't seem to suffer with this

thanks in advance!
 
  
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wasz
Sepang


Joined: 28 Dec 2012
Posts: 2864


1999 Porsche 996 Carrera 2

PostPosted: Tue Jan 30, 2018 8:14 am    Post subject: Reply with quote

Not normal, you likely have a leak, usual suspect is door membrane or blocked drains but a Targa will have a myriad of ways for water to get in....
 
  
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alex yates
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 15538
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Jan 30, 2018 8:34 am    Post subject: Reply with quote

Start by checking each carpet and see if they're wet. You can slip your hand under each rear one and feel the sponge backing just under the front of the rear seat on the floor pan. Check both fronts too.
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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stefant
Trainee


Joined: 14 Jan 2017
Posts: 58



PostPosted: Tue Jan 30, 2018 8:51 am    Post subject: Reply with quote

thanks all - I will start the investigation! it has always been fine so something must have changed... I remember cleaning out all the drain holes in the summer...

thanks again
 
  
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alex yates
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 15538
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Jan 30, 2018 8:54 am    Post subject: Reply with quote

All? Including your rear ones behind your rear speakers that drain out behind the rear wheel arch liner?
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stefant
Trainee


Joined: 14 Jan 2017
Posts: 58



PostPosted: Tue Jan 30, 2018 9:01 am    Post subject: Reply with quote

how do you get to the ones behind the rear speakers? now you mention it it doesn't sound like I cleared all of them!

Does anyone have a picture of the location of the drain holes
 
  
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alex yates
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 15538
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Jan 30, 2018 9:04 am    Post subject: Reply with quote

Remove the front part of the rear wheel liner and you'll see a drain hole.....probably bunged up like this:


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wasz
Sepang


Joined: 28 Dec 2012
Posts: 2864


1999 Porsche 996 Carrera 2

PostPosted: Tue Jan 30, 2018 9:35 am    Post subject: Reply with quote

Take the opportunity to clear out all the mud down there hiding behind the plastic, and check for rot.
 
  
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Diamaduk
Newbie


Joined: 29 Nov 2015
Posts: 9



PostPosted: Tue Jan 30, 2018 9:59 am    Post subject: Reply with quote

I had a similar problem on mine, turned out to be the little drain tube on the targa roof. Every time the roof is opened a small flexible rubber tube dislodges from the gutter under the roof. When the window is closed the rubber tube re engages itself into the gutter.
Mine had started to remain dislodged when the roof was closed which meant rain water was leaking into the rear near side footwell causing condensation.
All that was required was adjustment of the drain tube.
Hope this helps.
 
  
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stefant
Trainee


Joined: 14 Jan 2017
Posts: 58



PostPosted: Sun Feb 25, 2018 7:52 pm    Post subject: Reply with quote

Bit of an update (for everyone that was having trouble sleeping with the worry of what was causing the condensation)!

Having checked all the drain holes on the targa, they are all clear. Tried hosing water over the car when inside, all clear.

It’s been stored in my garage for the last two weeks and is condensation free, took it for a spin on Friday and after I parked up I started to get condensation...

My thinking is it has to be something to do with the aircon, maybe the aircon drain pipe isn’t working, or has maybe come disconnected?
I think it is under the passenger dash somewhere?

Any advice
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6155
Location: Brighton


PostPosted: Sun Feb 25, 2018 9:06 pm    Post subject: Reply with quote

Ok on a Targa there are several roof parts that can leak ..

Check the carpets behind the front seats to see if they are damp .. if so the front glass drain tubes have split .

Check under the rear base seats .. if wet its front glass seal or rear drain tubes leaking .

remove the panel under the rear screen .. it just pulls forward or look in the hand book ..

If the foam either side is wet by the drain tubes then the rear drains are either blocked or leaking .

A/C pipe is n/s/f and on the left of the center consol .. head into the passenger footwell and see if the pipe is connected , you cant miss it really .. usually held in place with a cable tie .


Btw is the a/c actually working .. if not then with any water in the car you will get misty windows after a run .


http://911uk.com/viewtopic.php?t=116450
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Last edited by deMort on Sun Feb 25, 2018 9:12 pm; edited 1 time in total
 



drain pipe.jpg
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drain pipe.jpg


  
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mzmini
Barcelona


Joined: 30 Jan 2015
Posts: 1441
Location: Somerset


PostPosted: Sun Feb 25, 2018 9:12 pm    Post subject: Reply with quote

OP do you have a rear wiper by any chance mine has leaked in the past and caused a condensation problem Demort helped me sort it out Thumb
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Pip1968
Suzuka


Joined: 26 Oct 2009
Posts: 1158
Location: Blighty


PostPosted: Sun Feb 25, 2018 9:48 pm    Post subject: Reply with quote

The last time someone posted something similar to this it turned out to be the heater matrix. I had it in my old BMW many years ago. I think wet carpets in the footwell comes a bit later.

Pip

http://911uk.com/viewtopic.php?t=119124&postdays=0&postorder=asc&highlight=heater+matrix&start=20
 
  
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Bluebird911
Nürburgring


Joined: 29 May 2010
Posts: 442



PostPosted: Mon Feb 26, 2018 11:42 am    Post subject: Reply with quote

Had a condensation problem a couple of weeks ago as i have just started taking the car out in the cold weather.

Both door membranes defective. Now replaced, problem has gone!!
 
  
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Chigster
Monza


Joined: 14 Jan 2016
Posts: 159



PostPosted: Fri Feb 22, 2019 2:11 pm    Post subject: Reply with quote

I've had the same thing start on my Targa - a lot of condensation and I mean a LOT. Enough to soak a hand towel once I've wiped down the windscreen and glass roof.

Will investigate this weekend and report back but I am suspecting worn seals on the rear window or roof.
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6155
Location: Brighton


PostPosted: Fri Feb 22, 2019 8:52 pm    Post subject: Reply with quote

Chigster wrote:
I've had the same thing start on my Targa - a lot of condensation and I mean a LOT. Enough to soak a hand towel once I've wiped down the windscreen and glass roof.

Will investigate this weekend and report back but I am suspecting worn seals on the rear window or roof.


Have a read through this ..

http://911uk.com/viewtopic.php?t=116450

You need to pull the rear carpets to see if its damp there , the very back ones under the tailgate ... if under the rear seats then the front glass seal is suspect .. the tubes break off and water can drip onto the rear seats .

usual fault is blocked rear drains though .
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Paynewright
Silverstone


Joined: 17 Apr 2018
Posts: 111
Location: Nr Lutterworth Leics


PostPosted: Fri Feb 22, 2019 9:25 pm    Post subject: Reply with quote

Always good to check the bulkhead drains. Remove the plastic covers in the frunk. They are approx 1” rubber bungs with a slit in them and usually full of crud!
 
  
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Chigster
Monza


Joined: 14 Jan 2016
Posts: 159



PostPosted: Sat Feb 23, 2019 9:09 pm    Post subject: Reply with quote

Update:

Carpets behind front seats - damp.
Carpets under rear seat base - damp.
Can’t tell if the rear parcel
Shelf carpet is cold or wet. Or if the sponge underneath is wet either. I’ve left some Dessicant overnight and will revisit in the morning.

Looks like lots of drain work coming up.

C
 
  
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