Both the tach and speedometer on my '96 Challenger are fogged with moisture. I pulled them out and tried the "drilling two holes" trick. It worked a bit, but they fogged up again as soon as I took the boat out. Are there any other methods that have worked for you guys? Right now I have them submerged in rice, but it doesn't seem to be having any impact.
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Getting moisture out of gauges
- Thread starter blacter
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Dr Honda
Well-Known Member
When doing the "2 hole" trick... you need to blow though the gauge with VERY dry air. If you use air from a compressor... it's normally VERY wet. When I do that in my shop... I hook a N2 bottle to them, and slowly purge them. The Nitrogen I get is pure, and VERY dry. If you know someone with welding equipment... any inert gas is OK. (CO2, Argon, etc) DO NOT use O2.
Got it. I was using one of those aerosal cans. I finally carefully took the gauge apart to deal with the moisture. Interestingly, even after a day or so apart, there was still enough moisture in the gauge to fog it up again when I put it back in place. Had to take it back out.
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