Member Contributer mello dude Posted April 12, 2010 Member Contributer Share Posted April 12, 2010 Make the call! I can use it for something, even if that something turns out to be a lawn ornament... :tour: You definately have an affliction Seb...... lol Link to comment Share on other sites More sharing options...
CathyEveridge Posted July 20, 2017 Share Posted July 20, 2017 Its steel. You could probably bend it 90 degrees and not have it break. Therefore it must be metal fatigue. Any resonant vibrations that you know of? Interference between the exhaust and subframe sending engine vibration into the subframe. Did the metal seem unusually hard? I would expect a low carbon steel here which should bend before cracking. If they used a carbon steel perhaps it was not properly tempered after hardening. Unless it was mishandled at the factory and not tempered after hardening or unless Honda has forgotten destructive resonance and designed another Pugent narrows bridge this does not seem like a feasible occurrence for the materials which should have been there. If the broken part is still available can you determine its Rockwell hardness? I'm not an expert on Honda steel but my guess is if the Rockwell is higher than mid 50s it was not properly tempered after heat treatment. That makes it a manufacturing defect. Link to comment Share on other sites More sharing options...
Member Contributer thtanner Posted July 20, 2017 Member Contributer Share Posted July 20, 2017 6 hours ago, CathyEveridge said: Its steel. You could probably bend it 90 degrees and not have it break. Therefore it must be metal fatigue. Any resonant vibrations that you know of? Interference between the exhaust and subframe sending engine vibration into the subframe. Did the metal seem unusually hard? I would expect a low carbon steel here which should bend before cracking. If they used a carbon steel perhaps it was not properly tempered after hardening. Unless it was mishandled at the factory and not tempered after hardening or unless Honda has forgotten destructive resonance and designed another Pugent narrows bridge this does not seem like a feasible occurrence for the materials which should have been there. If the broken part is still available can you determine its Rockwell hardness? I'm not an expert on Honda steel but my guess is if the Rockwell is higher than mid 50s it was not properly tempered after heat treatment. That makes it a manufacturing defect. FYI that post was about 7 years old Link to comment Share on other sites More sharing options...
CathyEveridge Posted July 20, 2017 Share Posted July 20, 2017 hey I'm old and I jabber a lot. Link to comment Share on other sites More sharing options...
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