16-03-2021, 11:17 AM
Acid-treating two blocks presently.
The 1934 one now has about 3mm clear, clean "pillars" of water channel between the cylinder jackets as viewed from the side. The early core-plugged one (with the additional brass plugs Tony mentioned were from the casting process) has been soaking and I pulled it to note that the rust seems to have gone but there are much less distinct channels between the cylinders, with more metal at the base of the cylinder jacket.
Are there distinct differences in block interiors? Clearly I can get it with a dremel, but I'd like to know what is structural and what might not be.
The 1934 one now has about 3mm clear, clean "pillars" of water channel between the cylinder jackets as viewed from the side. The early core-plugged one (with the additional brass plugs Tony mentioned were from the casting process) has been soaking and I pulled it to note that the rust seems to have gone but there are much less distinct channels between the cylinders, with more metal at the base of the cylinder jacket.
Are there distinct differences in block interiors? Clearly I can get it with a dremel, but I'd like to know what is structural and what might not be.