Stock M20, unknown history. Replaced the timing belt. (NOT the first time I have done belts on M20s.) All sprockets are correctly in place.
No matter how I follow the instructions, after rotating the engine twice the cam sprocket is either a half a tooth ahead or behind. when the crank is at the TDC mark. And THAT is cheating the procedure a bit. Doing exactly by the book, it is further off (two teeth).
I know I will get my ears pinned back on this, but post away.

