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Reply to "Sled Tins - Redoux"

OK, "Cheerful Charlies".......     Question time!!

Something that came up in this little operation was what appeared to be a failed air vane thermostat.  This is the part that helps the engine warm up quickly and then regulates the cylinder head temperature by varying the air directed across the cylinders.  

One of these things is not like the other.  They are both at about 50 degrees F.  

Which is the "good" one, and why?

bellows

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