I'm in the middle of a very slow coolant and hose-ectomy.
My 2003 4.6 has residue of someone before me using tap water.
The hoses I'm replacing are all caked with white scale.
I'm replacing all items. I'm concerned that the block has the same
white crud inside.
Before I get this X5 running again, I'm wondering how to get the white
film out of everywhere.
Has anyone tried the Prestone coolant flush?

Should I do a flush with the cleaner on the old radiator, or new one?

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2003 4.6is X5
2003 525it
2003 E53 X5 Standard shift