Posted by mattofvinings on August 01, 2009 at 09:32:20 from (75.131.212.224):
In Reply to: farmall M rods posted by LN on August 01, 2009 at 09:06:06:
My opinion is that the "flex-lock" nuts used are a step ahead of simply torquing to spec as they also provide added resistance to vibration.
Best practice, IMHO would be to use a torque-prevailing nut (also called deformed-thread) and set a couple up, cross-drill the free end of the bolt for safety wires once they are fully torqued.
IIRC they are fine-thread and so if possible you will want a "graded" nut as well to make sure the threads simply aren't torn out of the nut under loads.
While what I'm describing is probably somewhat overkill for an engine turning no more than 2200-2400 rpms max, at the same time I don't think any of us can afford the downtime or expense of the lower end of an engine coming apart.
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