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Old 02-13-2018, 12:05 PM   #32
Jim Brierley
Senior Member
 
Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,066
Default Re: Why no lock-washers?

I agree with Bill, the guru of stuff, if you want to install them, go ahead and do it! To add to your confused state, I don't put cotter pins on rods or mains. I was a truck mechanic for many years and never found a nut actually being held on by one. In the case of the Model A engine, I believe the racing fraternity back in the day built and used a variety of heavy rods when the problem was the castellated nuts, they only have a few full threads! I raced Model B engines with B rods, turning 6200 RPM and never had a rod fail. I now use ARP nuts.
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