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No, I'm talking about actual freeze plugs - sometimes called core plugs.
For bleeding the system I used the vacuum filler so there was no bleeding, burping needed. I don't recall what the owner's manual says but I do it every 4 yrs. Change the rad cap while at it too.
Definitely didn't pull coreplugs.
FSM only has you do this when pulling the block for work on a stand. Pages EM-93 and EM-232 detail their location (not sure why its in 2 places with different pics)
A few G35driver threads say its a total mess and regretted getting everything soaked in coolant. Flushing is fine imo.
