Good night, the first thing is to look at the camshaft with great care, of the beginning in the gears of the tree are like a round tube but 2 or 3 inch is a form of ,,, uu ,, exactly how I show you these two letters and you put an arrant rule so that they are aliniados, uu ,,,,, and do not remain ladded. The round shape with a stripe in the middle, the two stripes have to be used, and the test is put in the spark plug that you take off a paper plug (that does not go inside) and you give good to the pole of the pole of the crankshaft that thunder and jump the plug, be careful not to have the ariva face of the engine because the blow of the plug classes, I hope it is. And I could send you a echiso diagram, until then. And if you will be wrong, do not hurry through the valves since the pistons have a resaque of the valves and not bend.,