Moisture in headlights

Help, Advice, Owners' Discussion and DIY Tutorials on the Volvo S80 model. Sometimes called an "executive car", the S80 was and continues to be Volvo's top-of-the-line passenger car.
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June
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Moisture in headlights

Post by June »

With the cold rain near snow my headlights both ended up with moisture in them. I read some posted on here about replacement caps with a cloth covered vents from Volvo as a fix. The car goes in for a oil change next week and I would like to know what parts to ask for or at least a little more about Volvos fix for this problem. Thanks, June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

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RickHaleParker
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Post by RickHaleParker »

Most likely it just need new headlight gaskets. Cannot tell you a part number not knowing year and model.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.

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June
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Post by June »

RickHaleParker wrote: Sun Jan 07, 2018 7:45 pm Most likely it just need new headlight gaskets. Cannot tell you a part number not knowing year and model.
2004 S80 non HID headlights. How do you change the gaskets? June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

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oragex
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Post by oragex »

Had this years ago on the S60. Removed the plastic trim piece that runs on top of the seam between the glass and the housing, and put some outdoors silicone all along this seam. Stayed clear ever since.

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RickHaleParker
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Post by RickHaleParker »

How do you change the gaskets?

Remove the headlight assembly, Remove clips, Replace seal or make one out of clear Silicone RTV as Oragex did, reassemble.
The Volvo replacement for the gasket is Butyl tape. Volvo Part number 1161782. The RTV would work just as well.
Clean and dry well before reassembly. You don't want any moisture trapped behind the glass.
Light mist of Glass cleaner, then wipe it down with newspaper for a streak and moisture free shine.
S80 Headlight.gif
S80 Headlight.gif (15.1 KiB) Viewed 2168 times
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.

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xiami
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Post by xiami »

On my Volvo S80, there is small retangular Gortex like membrane on the dust cap that covers the rear the the light bulb assembly. My headlamps were fogging up with moisture on the inside before I cleaned the membrane. Over the years, gunk, oil, and dirt clogged the membrane and trapped the moisture. My headlamp moisture problem went away once I cleaned the membrane.

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Rattnalle
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Post by Rattnalle »

The membranes were created as a solution for this problem but were never as far as I know fitted from the factory.

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oragex
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Post by oragex »

This is what I did on my 2003 S60 a few years ago and it fixed the issue


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June
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Post by June »

Rattnalle wrote: Tue Jan 16, 2018 3:54 am The membranes were created as a solution for this problem but were never as far as I know fitted from the factory.
Okay, I took all four caps off and all four are solid plastic. Mine as far as I know are factory. This problem just started. Durring my warranty period nothing ever broke. What should I ask my dealer for? Would the venting caps have a specific name? Thanks, June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

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