I changed the head gaskets last week. Several gallons of brown chunky pudding came out then.
I had to redo the valve seals and set the timing today, plus i worked on the brakes.

I flushed the rad on and off all day before it came out mostly clear all the time... maybe 3hrs total of just flushing... so, what, a few hundred gallons of water went through this thing? I bet it all turns brown again pretty quick too... sigh. Nothing a few more day long flushes won't take care of.
I wonder what color the rust water will turn the Hydrangea this year.

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