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instrument fog
Posted: Fri Sep 08, 2023 12:35 am
by Zombie Master
1984 R100
So I often have some moisture in my speedo.
After running several hours it will dry out.
But it returns again.
Is there a vent hole?
Where might that be, if there is one?
Could it be partially blocked?
Has anybody done a mod, for better instrument ventilation?
Thanx
Re: instrument fog
Posted: Fri Sep 08, 2023 8:05 am
by SteveD
Are you using LED lights? I found the fogging was much worse.
Maybe a small bag of silica inside for a trial?
But to answer the question, maybe the way to go is to prevent the moisture getting in? Is the rubber gasket too compressed after 40 years?
Re: instrument fog
Posted: Fri Sep 08, 2023 9:12 am
by barryh
Fogging is quite common from what I can gather. I've tried silica gel and it did work but not for very long. Over time the fogging seems to attract dirt. When I had my speedo apart to fix the ubiquitous slipping gear wheel I cleaned the glass and what a difference that made. The tach now looks positively scruffy beside it so I'll have to clean that as well. Not a trivial job because I have to uncrimp the bezel.
Re: instrument fog
Posted: Mon Sep 25, 2023 4:03 pm
by mkj
If you park outside in the rain cover the clocks with a plastic bag, stops the fogging.
Re: instrument fog
Posted: Mon Sep 25, 2023 4:25 pm
by melville
If it's not raining where ZM lives, then the relative humidity is nearly always 100%. I had the same issue when I lived on the coast.
Re: instrument fog
Posted: Tue Sep 26, 2023 11:21 am
by mkj
In that case why not fit a little 12v computer fan, would do the job I think and you do get some little one.