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			JamesSP,Thx for the warning to lock the engine before disassembly or risk damage.  Can you specify the damage?  I bought a roller and just dropped the engine.  Looks like the PO overheated it - 2 melted spark plug tubes but oil in filter & sump is clean.  Want to disassemble but cannot rotate at all so TDC cannot happen.  Any thoughts how I can avoid the damage in your warning?
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