Hello / I just putted my spareengine in my Buick. Now I saw that the inside of the water channels and parts like the thermostate are full of rusty dirty stuff / how can I get the water circle clean and how can I stop it from further corrosion? Any stuff to flush the dirt out. I am afraid of getting the dirt in my radiator...
take the thermostat housing off,,, remove the thermostat,,,, disconnect the lower radiator hose at the radiator ,,, then stick the end of a water hose in the water manifold and turn it on full blast..... when the water coming out is clear,, you are good to go......
I have always liked DuPont #7 cooling system cleaner. It comes in a weird can that has a top and a bottom that open. You open the top and follow the directions, then open the bottom and do the same. One is a cleaner, the other is a neutralizer. I have been happy with the results. I would be tempted to follow Doc's procedure first.
