You don't need specs for the engine. Look for torque specs for the size fastener you're using. Good specs will even give torque values for the material you're attaching. Example: Steel fasteners into aluminum casting.
A good rule of thumb is to shoot for 8mm head bolts @ 120 to 140 inch pounds. For all other engine fasteners, 6mm, set your torque wrench to 60 to 80 inch pounds. Those values will keep you out of trouble.
You don't need specs for the engine. Look for torque specs for the size fastener you're using. Good specs will even give torque values for the material you're attaching. Example: Steel fasteners into aluminum casting.
A good rule of thumb is to shoot for 8mm head bolts @ 120 to 140 inch pounds. For all other engine fasteners, 6mm, set your torque wrench to 60 to 80 inch pounds. Those values will keep you out of trouble.