for the timing cover bolts start with the short ones and work your way to the longer.

the upper cover has 2 bolts with a molded washer (best way i could think to describe) no loose washers
in general the short ones go around the outside
the one on the bottom back has a bigger washer than the rest (6 to 7 bolt this one is different)
i believe the longest one goes top back with the top cover on

thats all i can think of