I just bought my first flat bottom v-drive with neovane pump which went bad. The original eight flaps are now just two and half. I know the pieces are still in engine, I have only recoverd at most two that were in upper outlet of starboard manifold. Is it common to remove freeze plugs or do I just wait for the engine to blow not realizing the boat overheated by the only piece I didn't remove. sorry my writing skills aren't that good, any suggestions would be great.