I had a good look at it the other day when I sucked some out of the header tank with a very large syringe. In short it looks awful! Its like a brownish black colour.
I therefore want to drain the system, flush it through (preferably with a hose) and re-fill with a proper coolant mix.
What I need to know is, what's the best way to drain the coolant system (as in least effort / least mess).
And... Can i flush it with a hose pipe and if so through which pipe / how?
When I do mine I'll do a how to (possibly a vid...).