SBC block filling ?

[Reed Granrt]

Originally Posted by Dwight Southerland

And the problem is . . . ? Been doing it for years with no problems. You can treat the block, rinse it out and neuetralize it with a couple of baths of strong baking soda solution in thirty minutes and be done. If you are using a concrete-based filler, you can pour it immediately. I have used Por-Rok and Rockite with great success. Phosphoric acid, Rust-Away and similar neutralizers take too long, will not clean nooks and cranies, and require scrubbing the scale off the parent metal, which is impossible to do in the water jackets of a block. If you don't get the scale out, there is a protective boundary layer that prevents the filler from adhering to the block and concrete-based fillers will eventually erode out.

We tried muriatic to "enhance" some cylinder head dimensions once, but it took twenty gallons, seven days and constant applied heat to remove .100". Somehow, that rate of "attack" on the base metal does not concern me.

Dwight
It is not a problem for me. If you want to "enhance" it even more , use hydrochloric. You can do that in a matter of minutes. Oh, have you eaten into a gas pocket around the cylinder yet. And yes, using muriactic for years is what I have done, but like many other things, I have learned better tech does exist (for me). Heck you can even soak it in Pepsi, Molasses, sorghum or what ever your medicine. All will work and safer. Your decision.
reed