Join Date: Jan 2008
Location: Seattle, WA area
Re: used radiator flush on rebuilt 302
I would just do a table-top pre-cleaning. A couple sawhorses or whatever to lay it on face-down and fittings up. Mix a batch of what they used to put in radiator flush. That's 2 ounces of oxalic acid (also known as wood bleach at the hardware store) and 3 drops of dish soap to each gallon of hot water. There are other recipes that work. This one roughly duplicates the basic old commercial versions.
Use safety glasses, gloves, etc. I fill the radiator full and let set a while, agitating to get bubbles out from time-to-time. Let it work. When cool, rock and shake it around while draining to get the crud out. Repeat. When you're happy, flush very well at all angles and directions with a garden hose.
When installed, use an appropriate blend of antifreeze and distilled water -or- 50/50 coolant pre-mix -or- straight distilled water (in non-freezing areas or seasonally only), and a bottle of 'radiator corrosion inhibitor and water pump lube'. Do not use tap water or bottled drinking water as they promote electrolysis. Drive happy. My 2¢.
-=≡ If it was easy everyone would do it ≡=-
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