Does someone know how much coolant stays in the engine IF one does NOT
pull the plugs on the engine water-jackets when doing a coolant replace ?

I'm curious as I replaced the long coolant pipes and most of the big
hoses/ heater hoses as well , so pretty much all the coolant drained out
, save for what's in the engine, wondering IF it is worth getting every
last drop out ?

Thanks  ..

-john