more on the use of steel bolts:
from post 327:
Quote:
Originally Posted by onehundred80 View Post
There is no need to exceed 4 ft/lb when using steel screws, remember you are screwing into an aluminum alloy and you do not want to strip the threads in the cylinder head.
You could use the 10 ft/lb mentioned in steel but not aluminum. The aluminum screws used are a safety precaution as well as corrosion prevention.

and from dedwards: Thanks for reminding folks of this important data fact. Even though I used M5-0.8x16 mm "blue-coat" SHCS screws, I only applied the 5-6 N-m tightening torque during re-assembly.

also, seen at post 19: "The normal SHCS's are Grade 12.9 steel and the valve covers are cast aluminum alloy. So it's easy to strip out threads if you over-tighten."