These are new bolts. I did oil the threads and the head. However
the old bolts torqued up just fine using this method... Not sure how
I'd clean the threads in the rods at this point...
John
On Mon, Mar 31, 2008 at 8:30 PM, Michael Porter <mdporter@dfn.com> wrote:
>
>
> John North wrote:
> I have read that these bolts should be torqued in three equal stages.
> Given the spec range of 38-46, I tried 20, 31 then 42. I backed off
> the nut between the three torques. I didn't have the guts to
> complete the last one, because the bolt made at least two full turns
> after being finger tight. When I removed the bolt, there is clear
> thinning in the last 5 or so threads and the bolt has stretched .114.
>
> I tried just torquing a bolt up to 40 and got about 1.5 full turns
> after the bolt became finger tight before I ran out of courage again
> and stopped. This one has stretched about .015, but did not torque
> up before I gave up.
>
> Does this sound right or should I suspect the bolts are not good? I
> am real scared of shearing off a bolt in the rod...
>
>
>
> Time for new bolts. If they've remained stretched after being torqued,
> that means they've yielded.
>
>
> The torques normally specified for a dry fit. If you lubricated the
> hardware in any way, then they likely have been over-torqued. If you
> fitted them dry, then there's the real possibility that they stretched
> during previous running or a previous installation.
>
>
> Cheers.
>
> --
>
>
> Michael Porter
> Roswell, NM
>
>
> Never let anyone drive you crazy when you know it's within walking
> distance....
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