Hmmm? I was thinking of pushing water up from the block drain and see if anything comes out from the opposite direction.
You could use a wet/dry vac and suction out from the wp hole.
Have you tried 'sort of' reassembling the broken pieces to get a sense of how much you're missing?
Debut Radio Show Tuesdays from 1-2-ish p.m. EST on Hamiltonradio.net The Mechanical Animals
call in for car repair help! 609-503-4058
A recent set--NSFW audio: https://youtu.be/_dcxcZfD6dg
Mangofy your E46!