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Originally Posted by rrgrassi
Only thing I do not get is, why would the block not be affected by a reverse, or even a foward flush for that matter, engine running, hose disconnected, but with a water source feeding the system. It would seem that if the block does not get flushed, then coolant is actually not circulating either. I do see how that happens with a drain the radiator, and drain the head only scenario.
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This is my thought too. Heavy rusty stuff might not come out, but fluid ought to. I flushed with a garden hose and nozzle. If the coolant in the bottom of the block doesn't move with that, then I don't see how it would ever move. I am convinced that all of the green coolant was removed. The water was perfectly clear after running it for 20 minutes. I'll do a few more flush and runs, though, just to be safe.
I am not currently up to taking out that block drain. The heavy rusty stuff is going to have to stay in there I'm afraid. Actually, though, I am not too worried about loose chunks of rust. I didn't notice any particles or other contaninants in the coolant. I just needed to get it all out so I could put in the pink stuff that is recomended. But, then again, I do have to fix a busted aircleaner assembly at some point. The plug ought to be easier to get to with that off.
Thanks.