A question of torque (bolts not power)
08-20-2014, 04:42 PM
#1
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Vehicle: 2010 GC 3.8
A question of torque (bolts not power)
If you tighten a bolt to 60 ft lbs, does it always take 60 ft lbs to break it free? or more? Had this conversation with someone earlier. I said if you tighten a bolt into spring steel (such as a lock washer), it would take more. Also, if you have given it time for the elements to play a role (which wouldn't take that long), it could be more or less depending on temperature and moisture.
08-20-2014, 09:15 PM
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Vehicle: 1997 RD 4-door
corrosion or rust will change the surface tension between the thread on the bolt and on the hole.
i deal with many customer's cars that shudder the torque wrench when i tighten the lug nuts instead of the smooth turn to "click".
i deal with many customer's cars that shudder the torque wrench when i tighten the lug nuts instead of the smooth turn to "click".
08-21-2014, 12:48 AM
#4
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When you tighten a bolt to 60 Lb. Ft., it takes more than that to loosen it. Google "stiction". Once the bolt breaks stiction, the force required to turn it drops dramatically.