Country, I don't think there should be antifreeze coming out of the discharge.
If I am missing something....someone please educate me.
I am totally amazed an impeller could make it that long...thatís one bad boy little impeller.
I wonder what else the PO did not check???
He probably has raw water cooling and had the engine full of antifreeze which was pumped out (let's hope it stays above zero).
I would'n t worry about the grease; impellers are water lubricated. About those pieces in your engine...Difficult to answer that one. They may have left the engine or they may block some of the cooling passages.