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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Armor on June 17, 2009, 10:10:01 PM
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hey all, im in the prep stages of my rebuilt 350/700r4 swap and im going to start the work on the intake manifold i have. The problem is that it is rusty inside more so then outside. Is there a way to get it out/is it safe to use if cleaned or something? its primarily on the mounting surface for the carb and inside where i can see through the 4 holes.
i think it was left outside over a few months or even a winter by the looks of the rust, but as i said is there a way to get it all out, or is it done for? the underside looks great, no rust which im attributing to being coated in alot of oil or something.
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Armor, Muriatic acid (used to clean concrete, ect.) will do it for you. Some stores have quantity limits & ID required for purchase. I've bought it at Home Depot. I would find a suitable pan/tray/bucket & pour a couple gallons it to submerge the intake. You have to scrub it with water once your done, so be ready to blow it off, warm it up & paint it before it rusts. Tape up the carb surface, plug the vacuum ports & water ports. fog some WD-40 up the ports & tape the intake surfaces, flip it upside down & lay an oil damped rag or two on the bottom side & cover it with a garbage bag or plastic sheet & get some paint on it quickly. Once the paint is dry, spray some more oil/WD-40 in it through a hole poked in the carb surface tape, then tape the hole shut. You can literly watch bare cast iron rust on a hummid day! Some places will turn Greenish/Black, but doesn't seem to cause a problem. Just be careful with spilling, touching ect...Wear rubber gloves & googles! Hope this helps, Lorne
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great to know, i work at Home Hardware, so i can get it in the morning, Thanks a TON(or half ton? JK)