The flat area on the camshafts is 30.41 mm, the tool is 29.82 mm. It took a bit of registration to get this working. Also, simply discard the included screws to hold it in place. These are cheap cast thread screws that take away the holes in the valve cover that they thread into. Purchase some 6mm x 1.0 hex head screws from a trusted source and use them instead. Good price, more expensive is not better.
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