Quote:
Originally Posted by engineer9
Found about 3” of some mysterious material that had settled out and solidified in the lower part of the block on both sides and from front to rear. Had to scrape and chip it out through the freeze plug openings. It was rather hard, grey-black in color with a coarse texture and came out in particle sizes ranging from dust to ˝”. Got about 2 quarts of the stuff out. It is NOT foundry sand…any one have any ideas on what this stuff is?
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Some people "fill" the lower part of the block with some kind of epoxy-type material in an attempt to strengthen the block. Could this be what you found?