Anyone have any suggestions for a lubricant for the exhaust heat riser valve? I can move the one in my wagon with a pair of pliers but I'd like to try and free it up (and keep it that way) if possible.
I use so-called "lock lubricant", it's graphite in something like kerosene. It works OK on old carburetor linkages that you're not supposed to lube.
It's not precisely a lube, but maybe some nickel anti-seize thinned with a bit of solvent would get in there and work.