I recently did a timing belt/water pump replacement on my wife's 2010 Challenger. When I got the covers off and attempted to align the timing marks before removing the old belt I noticed the Cam timing marks were about 3 teeth ahead of the Crank timing mark. I have scoured forums and google, but haven't come across any info about why this is. The old belt was in good shape (100,000 miles), no teeth missing, the car was running fine, I just knew the belt was due to be changed. I've attached some photos. Has anyone seen or heard of this? I'm not sure where to align the timing marks now. My first inclination is to align them to the marks on the cover, but knowing they were advanced and the engine ran fine, with no trouble codes, should I line them up the way the old belt (original factory installed) was.