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« on: June 03, 2022, 01:47:13 PM »
From back when all we had was the old beam style torque wrench to measuring the bolts to within a few thousandths. We've come a long way for sure.
When I check stretch, you can usually find a happy torque value to pull them down and get it close. That is kinda my way to verify there isn't a bolt that is out of spec(bad manufacturing, heat treat, etc). Usually it's about 5+ lb/ft more then what the old book calls for but that usually depends on how accurate the wrench is and the lube, etc. So I just pull most of them right to that number, confirm stretch and go to the next one.
I watch a video of a guy working on a bit Cat engine. They torque the main caps to XXX lb/ft and then take it 1/2 turn(or so). Since it's hard to find a torque wrench to go that far and even harder to pull something like that while laying on the ground they figured a basic torque to yield way. I did the rear springs on my Mack years back and had to pull the U bolts to like 600 lb/ft. What a bear that was. Had to borrow a buddies BIG torque wrench, then had to try to support it off the ground so I could reach out and pull it, and pull it, and pull it......ugh.