[Av8torTom]

How long can an engine lay dormant that has been factory "Pickled"?

Thanks

 

[brad walton]

I would ask the company that built and pickled the engine. But probably between 6 months and two years depending on how it was preserved.
I once had a surplus O-470 that was covered in cosmoline n in a can under 2psi of nitrogen that was close to thirty years old when we installed it. It was in new condition

 

[Raymo]

Desiccant is only good for so long so the method of pickling, as Brad suggested, is what matters.