apply a small bead of silicon rtv sealer to the gaps where the cylinder heads meet the block.
this is a 3 way intersection, the cylinder head, block and timing cover will all meet here, so a clean dry surface w/ some sealant applied is required to prevent oil leaks.
there are two of these joints on each side of the front of the motor.
now you are ready to install your timing cover.
(NOTE: you may want to install your front crank seal BEFORE installing the timing cover, it can be done with a simple seal/race installer or something similar. installing it afterwards requires a special tool)
you can now install the timing cover.
the bolts in the above picture are accurate for our trucks with the exception of number 10, we have a stud with a spacer behind it in that position. also the numbers in the above picture indicate the torque sequence. most people don't bother with it, but if you want it, there it is.
Tighten the engine front cover fasteners in sequence in three stages.
Stage 1: Tighten fasteners 1 through 5 to 25 Nm (18 lb-ft).
Stage 2: Tighten fasteners 6 and 7 to 48 Nm (35 lb-ft).
Stage 3: Tighten fasteners 8 through 15 to 48 Nm (35 lb-ft).
I'm not sure why they want 1-5 left at 18ft/lbs, doesn't make sense to me, so I went back and tightened them up to 35lb/ft as a final step. I don't know if that was right or wrong, but IMHO, it's not a critical thing anyway.