Uncle Onkel Udo II,

Indeed, may be more properly called an idler arm?

If an aftermarket outer tie rod, I'd found the metal soft, if tough (versus hard or brittle) and somewhat compliant where the conical sleeve and the concial recess in the idler arm interface.

So, with excess torque, and some years, and some rust, i can imagine you are or have had a heck of a time.

A pickle fork so long as you don't mind destroying teh rubber grease boot could work, or did you try that already?

Heat and percussion persuasion, then, to drive the tie rod out of the idler arm?

Hope it works for you.

cheers,

Cold Pizza Morning.
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LOL Cats say, "teh."