I need to flush my cooling system, and I did read the How To post, which involves flushing it through the bleeder bolt. That might be a little messy for me, as I don't want the old coolant in the driveway. Probably I'll just drain the radiator, a couple of times if I have to.
My question is: I know there is a drain bolt for the block. If I don't mess with it, relatively speaking, how much coolant am I missing by just draining the radiator? 25%? Maybe I'll just drain the radiator, refill with some flush, run it, refill with a weak solution of anti-freeze (trying to keep the flash rusting away), then drain again and refill with a somewhat more than 50-50 anti-freeze/water, to compensate for the mostly-water in the block. I'm wondering how much more than 50-50 to do, which is why an estimate of the volume of the block compared to the radiator would be good to know.
Thx
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