Sounds like you have a pretty tight quench area if powdered metal stops the engine from turning over. What do the rings look like, are the pistons scuffed? It sounds like way to rough of a cylinder wall finish to me, prematurely wearing the rings out. The new rings that we have today will not tolerate a very rough cylinder finish like the rings we use to get years ago. I just had an engine here that had similar issue, but it did not lock up. What we seen was excessive blow by to the point that it blew the dipstick out. This is about the tenth time I have had an engine come into my shop with this problem in the last 5 years. Every time it came down to cylinder wall finish, and every time it was the same old story. I just had the engine rebuilt less than 200 miles ago and this started.
Don Johnston
DCI MOTORSPORTS INC.
330-628-3354 cell
330-850-5050 shop
Designer of the DCI Tiger heads and the NEW DCI Ram Air V heads!!!!
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