Posted by Ken See on Wednesday, August 11, 2004 at 11:08AM :
In Reply to: How do you clean water passages? posted by Don in Missouri on Wednesday, August 11, 2004 at 10:53AM :
I use air through a steel brake line down one port (head removed), and water down another port right next to it. The air would stir up the crap and the water would flush it out. I had a ton of crap, long story but a mentally challenged town employee changed the oil but poured new oil in the radiator. So the block was filled with sludge.