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Registered
Join Date: Jun 2003
Location: Mclean, VA, USA
Posts: 16
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Condensation on fuel and temp guage
1983 911 SC
When the weather is humid, condensation fogs the inner glass surface of the fuel and temp guages. It doesn't affect the speedo nor the clock guage. Anyone experience this and any help on trying to reduce or prevent condensation? I placed wall insulator materials behind the guages but no help. Doug |
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09-22-2003, 08:28 AM
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Join Date: Aug 2003
Location: Wichita Falls, TX
Posts: 113
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I don't know the answer, but I can tell you that it very guage specific. I just replaced my temp/druck press guage last week and the new one fogs up around the edges in the morning. My other guages and the old temp guage are fine
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Bart '72 targa 2.7 |
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09-22-2003, 08:53 AM
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Senior Member
Join Date: Nov 2000
Location: Great NorthWest
Posts: 3,944
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It's a case of differing temps inside versus outside the gauge. All the sealing you can do only reinforces the differential.
You might try grabbing a bunch of the anti-humidity packets you (used to?) find in shoe boxes and the like. These, placed in proximity to the gauge's most-open hole *might* help. You might even be able to shoe one in through a bulb hole, but I'm not advocating that you do! Really, folks like you and I are just going to have to remove the plastic face and clean the inside with anti-static, anti-fog and see if that fixes things. I think that, in terms of condensation, it is much like rust and cannot be avoided. John
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'78 Targa in Minerva Blue |
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09-22-2003, 09:10 AM
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Registered
Join Date: Nov 2002
Location: Los Angeles
Posts: 729
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 Yes, my gauge face look like above. When I open the gauge, it was actually yellow glue that coated the lens. I think the glue was evaporated due to high temperature. I had to use gasoline to clean it all out. It just happened in one of the gauge.
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Caliber 1987 911 Cabriolet |
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09-22-2003, 09:19 AM
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Double Trouble
Join Date: Nov 2002
Location: North of Pittsburgh
Posts: 11,705
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It happens to mine (70) every time it rains, is very humid, or I wash the car. It's a humidity thing. Once the car is in the sun for a while it goes away and does no damage. Can't say I have tried to fix it. Not sure it's worth all the work.
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I used to be addicted to the hokey pokey..........but I turned myself around.. 75 914 1.8 2010 Cayenne base |
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09-22-2003, 10:22 AM
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Senior Member
Join Date: Sep 2000
Location: planet earth
Posts: 2,253
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Thought it was just a Targa thing. Mine does the same. If I turn on the defrost it clears it out pretty quick.
The one I would like to fix but haven't figured out just yet is the Tach. When the car sits in the sun the plastic lense on the tach warps and causes the needle to hang up. Again turning on the fan will move enough air to un warp it but annoying none the less
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78 Euro 911sc Targa 03 Hayden SCWDP |
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09-22-2003, 10:35 AM
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Go Speedracer, go!
Join Date: Aug 2002
Location: Indianapolis
Posts: 1,951
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My car is a coupe and has the same problem. Only on the oil temp/fuel gague. It only happens when it's very humid out. I also don't feel it's worth the trouble or the potential of damaging the gagues to repair it.
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1981 SC ROW Coupe |
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09-22-2003, 11:26 AM
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I have an Targa that does the same thing and a guy I work with has a 76 Coupe that does it too. This is too many different types to be model specific. I wonder if their is an AC duct or an air in leak that does it.
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DonMo 1984 911 Carrera Targa 3.2 liter, SSI's, Dansk 2 to 1, Steve Wong Chip Columbia, SC "Go Hokies" |
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11-06-2003, 04:50 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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I drilled a hole to vent air..
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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11-06-2003, 04:55 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,997
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The gauges towards the left hand side do this on most 911s. It's very common.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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11-06-2003, 04:57 PM
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Registered
Join Date: Feb 2001
Location: South of the Mason-Dixon Line
Posts: 3,722
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I have seen it in my past 911's (74, 79 and now 73.5). Its guage specific and its exclusively Porsche. I have never seen it in Lucas instruments, only the VDO 911 Fuel/Oil guage.
I dispell this as an exclusive Porsche characteristic that is a way to make you 911 even more unique!! ......If it does not fog on certain days, I GET WORRIED!! We should gather a list of these funky 911 items. Regards Bob 73.5T |
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11-07-2003, 04:49 AM
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1984 Porsche Targa 3.2
