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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Tue Oct 29, 2019 9:36 pm    Post subject: Reply with quote

hopeydaze wrote:
What size holes are y'all drilling?


I did two in the underside of the casing and used something like a 6 or 7 MM drill bit (it was in my dewalt and I didn’t bother changing it). Small enough I can re seal of needed.
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Sun Nov 03, 2019 10:49 pm    Post subject: Back to square one Reply with quote

So to update this thread. I put the lights back together after days of drying and meticulously sealed the back with the original rubber gasket. I drove the car this weekend in pretty foul rain and both lights are equally fogged up in the centre section. I will monitor and see if my two holes on one light unit do anything to help clear the condensation. I’m not entirely sure where the dampness gets in.

Rather disappointed to see that it made no difference splitting and re- sealing

🧐
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7572
Location: Brighton


PostPosted: Mon Nov 04, 2019 7:46 pm    Post subject: Reply with quote

I think although i'm not sure that the leak on these was due in most cases to the clear lens seperating from the rest of the lens .. i've always assumed they are made separate and then bonded together .

It rings a bell from my OPC days anyways .

To prove .. hmm .. sellotape over the clear lens edges and see if it still gets wet is all i can think of.
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Mon Nov 04, 2019 11:27 pm    Post subject: Reply with quote

deMort wrote:
I think although i'm not sure that the leak on these was due in most cases to the clear lens seperating from the rest of the lens .. i've always assumed they are made separate and then bonded together .

It rings a bell from my OPC days anyways .

To prove .. hmm .. sellotape over the clear lens edges and see if it still gets wet is all i can think of.


Hi thanks ! I’ll take another look but pretty sure they are just one outer cover as I have both a hand polish to remove swirls and didn’t feel or see any boundary line. I may try some silicon beading on the lens and body join (not the rear cover as this needs to be removable).
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James M-S
Suzuka


Joined: 11 Apr 2017
Posts: 1110
Location: Derbyshire

2009 Porsche 997 Carrera 2

PostPosted: Mon Nov 04, 2019 11:33 pm    Post subject: Reply with quote

I have read* that the joint between clear and red sections is where water ingress occurs. *(on the internet, so it must be true!)

I would forget silicon and just get some ppf applied over the whole lens face. (In addition to the drain holes)
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Tue Nov 05, 2019 8:01 am    Post subject: Reply with quote

James M-S wrote:
I have read* that the joint between clear and red sections is where water ingress occurs. *(on the internet, so it must be true!)

I would forget silicon and just get some ppf applied over the whole lens face. (In addition to the drain holes)


Thanks.. I am going to triple check.. But looking at my photos, I am pretty certain there is no join (on a 997.2).
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IMG_4175 copy.jpg
 Description:
997.2 Rear light with condensation (Frost)
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MaxA
Albert Park


Joined: 11 Oct 2015
Posts: 1667
Location: Helsinki


PostPosted: Tue Nov 05, 2019 3:53 pm    Post subject: Reply with quote

My right rear light still suffers when it rains, but now that it's ventilated, it seems to dry out eventually. As such I think it is water ingress through the seams between the lens and the back - not betwen the red and white parts of the lens. That wriggly skinny black rubber gasket is about as useful as a chocolate teapot. I'm going to try silicon sealant next time.
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Tue Nov 05, 2019 4:24 pm    Post subject: Reply with quote

MaxA wrote:
My right rear light still suffers when it rains, but now that it's ventilated, it seems to dry out eventually. As such I think it is water ingress through the seams between the lens and the back - not betwen the red and white parts of the lens. That wriggly skinny black rubber gasket is about as useful as a chocolate teapot. I'm going to try silicon sealant next time.


Agree the wriggly part is perhaps not ideal. I spent considerable time getting that just perfect before fitting the halves together. My suspicion is either the bonding between the lens and the body (and thinking of a bead of silicon) or the wriggly gasket on the vertical side nearest the engine and the screws.. I found dirty water marks through the seal at that point (also where all the water run-off channels down)..

Agree re the vent holes.. I might add some more..
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Magic919
Barcelona


Joined: 05 Jun 2013
Posts: 1279
Location: Berkshire


PostPosted: Tue Nov 05, 2019 5:12 pm    Post subject: Reply with quote

The early lights have a fault and they let water in along the white/red join. The later German made lights don’t do this.

The later ones still suffer condensation, but don’t fill up.
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Tue Nov 05, 2019 5:55 pm    Post subject: Reply with quote

Magic919 wrote:
The early lights have a fault and they let water in along the white/red join. The later German made lights don’t do this.

The later ones still suffer condensation, but don’t fill up.


Thanks for the clarification! I can confirm mine condense but have no real liquid in.. Still more condensation than I would like and hence the tinkering..
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Wed Nov 06, 2019 9:04 am    Post subject: Next stage Reply with quote

Hi - just to keep this updated.. I have bought some new rubber lengths (solid vs the foam style that Porsche uses in the lights).. 2mm and 3mm dia to see if I can make a better seal that works for opening and re-sealing the lights (allowing access to the reversing bulb in case it needs to be changed).

I am also going to look at a silicon bead on the join between plastics (body and outer lens).. Will update in the coming days..

S
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Richtw
Silverstone


Joined: 27 Feb 2018
Posts: 137
Location: Winchester


PostPosted: Fri Nov 08, 2019 11:49 am    Post subject: Reply with quote

I had the same issue - just got the lenses wrapped at a car wrap place. clear film, £30, took them 20 minutes - no leaks and is not noticeable......easy solution!
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Fri Nov 08, 2019 11:56 am    Post subject: Reply with quote

Richtw wrote:
I had the same issue - just got the lenses wrapped at a car wrap place. clear film, £30, took them 20 minutes - no leaks and is not noticeable......easy solution!


Good to know! I cannot see how my 997.2 lenses are porous as they have no cracks, but will check that again!! Mine are due to come out again to experiment.
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Fri Nov 08, 2019 1:44 pm    Post subject: Reply with quote

M5sime wrote:
James M-S wrote:
I have read* that the joint between clear and red sections is where water ingress occurs. *(on the internet, so it must be true!)

I would forget silicon and just get some ppf applied over the whole lens face. (In addition to the drain holes)


Thanks.. I am going to triple check.. But looking at my photos, I am pretty certain there is no join (on a 997.2).


Seems I was mistaken!!! On CLOSE inspection, the white lens part is a very tightly fitted element.
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Fri Nov 08, 2019 1:49 pm    Post subject: Reply with quote

I took my lights out again and need to admit error that there is a join on the 997.2 lights between clear and red section. the join is very seamless and tight.. Hard to see how moisture gets through that join.. But perhaps this is as simple as PPF on the lens..

I wonder if the bonded edge of the lens is an issue as water sits all around that border..

The test holes I drilled in one lamp (2 holes) seems to have made no positive impact.. Perhaps more holes are needed..

PPF test to come

Simon
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IMG_4222.jpg
 Description:
The outer edge of lens to body.. Water sits in here and I wonder if this is where capillary action is drawing it in
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 Description:
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IMG_4221.jpg
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Magic919
Barcelona


Joined: 05 Jun 2013
Posts: 1279
Location: Berkshire


PostPosted: Fri Nov 08, 2019 3:36 pm    Post subject: Reply with quote

Are they the old or newer type?
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Hertsdriver
Nürburgring


Joined: 12 Nov 2018
Posts: 468
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Fri Nov 08, 2019 3:48 pm    Post subject: Reply with quote

M5sime wrote:
the join is very seamless and tight.. Hard to see how moisture gets through that join..

Capillary action Thumb
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Fri Nov 08, 2019 4:16 pm    Post subject: Reply with quote

Magic919 wrote:
Are they the old or newer type?


Newer 997.2 type.. LED from a 60 plate car.
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M5sime
Newbie


Joined: 02 May 2019
Posts: 32
Location: Buckinghamshire, UK


PostPosted: Fri Nov 08, 2019 4:19 pm    Post subject: Reply with quote

Hertsdriver wrote:
M5sime wrote:
the join is very seamless and tight.. Hard to see how moisture gets through that join..

Capillary action Thumb


Smile I remain skeptical on this being the issue.. I have been doing some tests and think the issue is the weld around the edges. I am going to seal the edges on Sunday with Silicon and then explore..

I spoke to a PPF place nearby me and he said his experience was that the join was the issue with heat/cooling cycles and not the lens..

So it continues.. I want to get to the bottom of this, so will do the edges first and if this doesn't solve it.. then PPF!
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Magic919
Barcelona


Joined: 05 Jun 2013
Posts: 1279
Location: Berkshire


PostPosted: Fri Nov 08, 2019 4:22 pm    Post subject: Reply with quote

They are all LED. What are the last 2 digits of the part #?
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