Is that a coupling nut or a turnbuckle on the end of the rod? (Turnbuckles have right and left hand threads) It looks like the front piece that would have bolted to the hole at the top of the radiator is missing.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!