After fitting my rebuilt damper and going for a test drive last Thursday, while being very satisfied with the improvement in running smoothness, I detected a slight, intermittent misfire in top gear at around 60 mph. So I pulled the plugs and cleaned them and checked the points gap yesterday. Today I was planning on another drive to check things, however, a backfire on engaging the starter indicated that the timing was off.
I pulled the dizzy checked and cleaned the points, but on refitting the dizzy with the engine at TDC on #6 (front) and the timing mark just coming into view I noticed that the dizzy wasn’t fully seated, in fact the only way it would seat fully was to rotate the drive through 180 degrees! Now, of course, the rotor is pointing backwards to #1! The bizarre thing is that when facing forward it will engage the drive it just will not fully seat flush with the block. I recall that when moving the dizzy to get the points to their open position I put a screwdriver in the top of the shaft engaging the screw below the rotor and was surprised that the drive did rotate. This, on reflection, is clearly what put the timing out! I have put over 30,000 miles on this rebuilt engine with, I suspect, the drive incorrectly engaged. Is that even possible!! I have removed the oil filler cap and confirmed that the engine is on the compression stroke.
I am at a loss as to how to resolve this situation? Any thoughts, suggestions appreciated.