101 Timing Question

[AutoInsane]

A thin round spring was on the end shaft off of the crank when I removed the timing cover. Something to do with the main seal?

Also the flat disk on that shaft by the timing gear .... Does the curved edge go toward the engine side??

Another website mentioned caution about burning out the main seal. Any special prep or lubrication I needed to do when I put the timing cover on?

I know that the oil pump gears needs to be packed with Vaseline ... Any other considerations?

Any tricks to taking off the timing chain?

Thanks!!!