[pavilla]

With the head off, one trick I stumbled upon was using a telescoping magnet to poke down into the water jacket in the corner near the #4 cyl. You would not believe the pile of rusty crud I pulled out of that area. Just keep poking the magnet down around the corner and end of the engine block until it stops bringing up rust boogers. The rust and scale sticks to the magnet like glue. You can get a similar magnet at HF. Then do your flushing.