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1st spin engine CLOCKWISE only to TDC as indicated by the mark @ 10:00 above the crank pulley. Lock it at TDC with a 5/16 allen key to prevent cam timing movement. Remove the oil pump with 10mm socket AFTER noting the direction the arrow is pointing for cylinder bank involved. Pull pump straight out of the head, replace oil ring & reinstall in exact same position as before, insuring arrow/pointer is pointing the same way. The head scavenge pumps are interchangeable just oriented opposite from the other bank.
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