I changed my timing belt at 105,000 miles. I never really was able to find the crankshaft mark. In fact, on the Volvospeed page, where he says " Finding the little cut out in the valley of the crankshaft gear is difficult.", I can't see what mark he is talking about, despite the closeup.

On my car, one of the crank teeth has a little notch on the engine side of the tooth, but it is on the tooth itself, not in the valley between the teeth. The way my car is currently set up, when the cam timing marks are in position, that notch on the crank tooth is half a tooth past the mark on the block. (Meaning that the next valley past that tooth is lined up with the mark on the block).

I have driven the car 2,000 miles since then, and it runs fine, but my gas mileage seems to have dropped slightly. Does it sound like my cam timing is retarded by one tooth?