Use a silicone base sealant for the plate when installing it to the block. Here is the torquing sequence which is a four step processes.
Tighten bolts 1-6 to 10 Nm (89 lb-in).
Hand tighten bolts 7 and 8.
Tighten bolts 7 and 8 to 20 Nm (15 lb-ft).
Tighten bolts 7 and 8 an additional 60 degrees.