Originally Posted by dedwards0323

The torque values listed above are the recommended values for the crankcase breather covers (5-6 N-m) and the valve covers (10 N-m). The 5-6 N-m would equate to 44-53 in-lbs. So the 48 in-lbs you used should have been good. Possibility of weak material, inaccurate torque wrench, or any other factor. I took the extra precaution and instead of using NEW aluminum screws (and the small aluminum screws are a 1x use only), I used corrosion-coated (marine grade) steel screws. Achieving the recommended assembly torque was no issue.

Glad everything turned out okay for you. (Note: I switched to the corrosion-coated, steel screws after I sheared the head off a new aluminum screw! Been There; Done That!)