It is strongly suggested that you obtain an engine manual when doing this work.

there are a few different lengths of bolts in varying quantities. If you call Phil at the 1-800 number on this site, he will know all the sizes and quantities you need for your order.

the tool is NOT Torx! It is triple square, xzn, or double hexagon.... all the same. I think it is M12.

Assuming you are pulling the head,

-pull the pins and the guide rail.

-Pull the tensioner.

-you can either make marks on your chain to the sprocket and remove the sprocket and drop the chain... or you can tie the sprocket to the chain and drop them together in the cavity.

the head will come off without too much interference from the sprocket resting there.

the issue of timing becomes important when people remove the sprocket and do not realize there may be a bunch of loose chain in the cavity. Pull really hard on the injection pump side to remove the slack created by the vacuum pump.

do not break your chain unless you plan on replacing it.