crvtec90 said

There is a heavy duty cooling system flush made by Prestone. U can get it at your local parts store. Comes in a yellow cylinder. Its acid based and u can use it to flush your entire cooling system with the car running. When u are done flushing with the acid, u drain it out and add a neutralizer so the acid stops eating at the gunk and corrosion. Takes a few hours to go through the whole process. All this doesnt have much to do with a 22 inch radiator, but I thought I would share. Most of us have old stuff as was said and could use a good cleaning.

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