It seems that I really screwed up on my CAM installation with my engine rebuild. After getting the engine back in the frame I was setting the valve clearances when I noticed that the valves did not seem to be opening and closing at the correct points. I thought we were being very careful aligning the TDC mark and the notch on the cam gear during installation. Right now the only external indicator I have is the pin hole that would be used for the timing advance. That pin hole is at the top or bottom when the pistons are at BDC :-( and at the 3 and 9 o'clock positions when the pistons are at TDC. The valves appear to be opening and closing 180 degrees out of spec.
My question is, does that pin hole line up with timing notch on the cam gear which should have been at the top with the pistons at TDC? Other than trying to build a make-shift degree wheel to try to verify my worst fears, knowing where that pin hole lines up should tell me everything I don't want to hear before tearing it all apart again. The pictures I have seen of 650 CAMs on-line have a key-way slot rather than a pin hole, but they appear to line up with notch on the gear.
Would it explain my problem if I somehow swapped aligning the TDC mark on the cam with the one that should be alligned with the top plane of the head?
My question is, does that pin hole line up with timing notch on the cam gear which should have been at the top with the pistons at TDC? Other than trying to build a make-shift degree wheel to try to verify my worst fears, knowing where that pin hole lines up should tell me everything I don't want to hear before tearing it all apart again. The pictures I have seen of 650 CAMs on-line have a key-way slot rather than a pin hole, but they appear to line up with notch on the gear.
Would it explain my problem if I somehow swapped aligning the TDC mark on the cam with the one that should be alligned with the top plane of the head?