Hi, Chuck!
I would bet it didn't fail in shear, but in fatigue, from the vibration of
the engine and the cyclic inertia loads applied to the bolt by the air
cleaners in response to the vibration -- particularly if the bolt had been
loose for a while.
Steve Byers
Havelock, NC USA
'73 Midget GAN5UD126009G "OO NINE"
"It is better to remain silent, and be thought a fool
than to speak, and remove all doubt" -- Mark Twain
----------
> From: chuck ciaffone <chuckc@ibm.net>
> To: spridgets@Autox.Team.Net
> Subject: Strange rattle -- solved
> Date: Friday, October 16, 1998 8:33 AM
>
> Man o man, sure was chilly top-downing
> into work this morning at 45 degrees F.
> Warm toes -- cold ears!
>
> Had a strange rattle yesterday. Started at about
> 2000 rpm. Spent an hour or so last night
> poking, prodding, and tightening bolts and
> nuts all over. Went to check the air cleaner
> bolts. Sure enuff. One of those massive 5/16
> x 4 1/2 bolts had sheared clean off between the
> cleaner and the carb body. Replaced the bolt which
> fixed the rattle.
>
> But really ... what kinda forces are on an air-cleaner
> bolt that would cause it to shear?
>
> chuck
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