Ok, To replace the seal, do I need to remove the distributor cap and rotor? where exactly is the seal and how long will this job take, any especial tools, and do and don'ts. thanks. By the way I hear there is some part that can be put back 180Deg wrong and so It should be marked with a highlighter so as to put it back just right, does that concern me? A video or pictures would really be appreciated. thanks