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Registered
Join Date: Aug 2002
Location: Dallas TX
Posts: 84
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Foggy Guages
My Temp/Druck guage foggs up after about 10 mins of use. Any ideas of what causes this?
I assume Ill have to pull the unit and clean the inside of water? Anything special I should know before I pull it?
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James "I found a moon rock in my nose" '77 930 |
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10-29-2002, 05:02 AM
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Registered
Join Date: Dec 1999
Location: Porsche Money Zen
Posts: 1,701
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It's actually pretty normal for them to do this. You won't find any water in there. The gauges are just poorly vented.
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Mark Szabo 1986 911 Targa 3.2 (I will miss you) 1985 Scirocco 8V (I will not miss you) 1986 Dodge B150 Ram Van (I can't believe I got $200 for you) 1987 Escort 5-speed 1.9 RIP |
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10-29-2002, 05:16 AM
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Registered
Join Date: Aug 2002
Location: Dallas TX
Posts: 84
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hrmmm is there anything I can do to reduce the fog?
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James "I found a moon rock in my nose" '77 930 |
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10-29-2002, 06:03 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,274
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As you've guessed, they all do it, at least in humid environments. If Dallas has had half of the rain that Houston has had.... I've heard that drilling a tiny hole in the bottom of the gauge cup (the part behind the dash that you don't see) will eliminate this. I've noticed that the gauges that fog get noticably warm to the touch which is what, I believe, causes the fog. I've toyed with the idea of putting a dessicate(sp) pack in the gauge.
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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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10-29-2002, 06:10 AM
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Senior Member
Join Date: Nov 2000
Location: Great NorthWest
Posts: 3,950
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I think it must be the heater ducts behind the gauge? Moisture in the gauge and het causes condensation.
Best bet is to drive the car hard until you drive the water out of the gauge, sort of like with the oil... John
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'78 Targa in Minerva Blue |
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10-29-2002, 06:33 AM
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Join Date: Oct 2000
Location: Sherwood, Oregon
Posts: 2,119
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I was going to tell him his car was haunted
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Cary 77 Carrera RS w/3.2 #59 73 914S 2.0 AG 73 914 1.7 Driver ( daily driver, under complete rustoration ) 74 914 2.0, 71 914 Tub, 74 914 2.0 Tub + 73 914 donor |
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10-29-2002, 02:38 PM
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drill a hole or 2 in each gauge and it will all go away
 ChadC 71 911S Targa without foggy gauges now!! |
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10-29-2002, 03:32 PM
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1971 Porsche 911S Targa 2,2
