[boyt911sc]

My son came over the house to give me a hand and offer a set of second eyes and ears. As I turned the crankshaft (clockwise) starting @ TDC Z1 for cylinder #1 (1-6-2-4-3-5) sequence, my son was closely observing the movement of the cam and rocker arm for each cylinder. As anticipated, the slapping noise came as predicted at 1-6-2-4-3-6 sequence.

And a very close up observation at cam and rocker arm inter-action seems to show a sudden loss of contact between the cam lob and the rocker arm during engine rotation. This was the 3rd time the cam timing was set. The previous 2 times never had this slapping problem. So I will re-test the cam timing setting. Both sides were set @ 1.30 mm cam timing. Previous setting was @ 1.26 mm.

Please feel free to offer any ideas, suggestions, recommendations, etc. and will consider them. It is obvious that there is mechanically wrong or out of spec. that I do not realize at the moment. Thanks.

Tony