Yes, that is great news!

I wonder if applying the vacuum to the intake valve runner while rotating the engine so that the valve opening inside the cylinder got larger and larger would work. I'm thinking that the narrow initial opening of the valve would have higher air flow and the plastic piece would be closer to the top (on the piston) and so would get sucked and held at the opening, until the valve opening was large enough for the plastic piece to pass through.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC