Thread: How can I get old alum heads to look new?

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BIG,

It is readily available at most stores that sell A/C equipment. Check the concentration of Phosphoic acid to other ingredients, as you want the highest concentration you can get. If you can get a regular coil cleaner at an A/C dealer that is the best. Use a hudson sprayer to thoroughly coat the heads. The first time it will foam white is spots, just use a scrub brush to wash the part, rinse with water and keep spraying with acid until the entire part foams white, then rinse thoroughly and air dry. The cast aluminum will look like new. It will eat the aluminum but you have to let its set for hours to do it. It works wonders on the old style non clearcoated aluminum wheels. makes them look like new.

A lot of prducts have phospohric acid in them like oven cleaner and most purple all purpose cleaners.
John

CHevyboy,

My oldest brother used to build aluminum truck bodies and he used Phosphoric acid to clean them with, that how I found out about it.
John

Originally Posted by 41willys

Phosphoric acid

Plus you drink it everything you have most sodas. I wonder why our inners aren't that clean ....joe

Joe,
I wonder why they even put that stuff in pop anyway? I mean how much Phosphoric acid does your body need in a day?


Another thing to try is Sodium Hydoxide. This is a very powerful base as apposed to phosphoric acid. It will clean aluminum quite well, (it will burn you badly though), and it is much better for the enviroment than all of the phosphates down the drain.

No matter what you use BE CAREFUL.

John

If you want to try a paint, they sell some called Alumablast which I painted some heads and a trans case with..haven't run it yet but it's not too bad looking. Search it on the web and you'll find it.

eastwood used to carry it

How does hold up on a engine (heat)?