Quote:
Originally Posted by Big Yellow Tractor
I've had bolts strip at well under the specified torque using a good quality torque wrench; it depends on the condition and cleanliness of the bolt and receiving thread. Have a look at the bolt as it comes out to see if it's brought any metal with it. If so, be very careful putting it back. It's not a bad idea to have a little tooth-brush sized wire brush to give bolts a clean up before refitting.
For most stuff I think I know about how tight things need to be. If doing up a series of bolts I try to get in a position where I can achieve a controlled and repeatable pressure by maintaining a similar hold and direction on the spanner/bar. Some small bolts need a little finger on a short spanner, some big stuff needs to "grunt" tight and even bigger is "grunt and fart" tight. The front sprocket on my DRZ is "nearly sh*t yourself" tight.
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Good points all!
Also, regards inspecting threads on removed bolts: look for "stretched" or warped threads on the bolt. If so, replace the bolt, don't try to put it back in unless it's a roadside, no other option deal.
Grease on bolts means you won't realize it's getting tight and may over tighten it ... so grease on bolts can mean a stripped bolt. In aircraft school we were taught to never grease a bolt. Dry and clean or Loc-tite if called for.
But grease on mating surfaces (heads) can sometimes be "a good thing". It's sort of old school but is tried and true and works on some assemblies.
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