I work for a machinery manufacturer. I'm an electrical engineer but also get involved in some mechanical stuff. Anyway, I was looking through my company's engineering standards book and saw the write up on torque specs for various size fasteners as well as correction factors for when anti-sieze or other type of lubricant is on the threads. As you can imagine, the oil drain plugs will have oil on them, so will the threads in the crank case and the catch tank. So, when you crank that thing to 17 ft/lbs like it says, you are actually putting upwards of 34 ft/lbs on it. So no wonder the damn threads are being ripped out. The correction factor is approximately 0.5. I will post the document from my work in pdf (if I can!) It's a good reference to have. So I would say the proper setting on your torque wrench for any lubed bolt/thread connection is half of what it says in the book.
Marcel
see below for two more spec sheets
Marcel
see below for two more spec sheets
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