To close this loop, I talked to the vendor who tested their supply and
found them defective. Of course the vendor will make things right.
At this point I think I'll take Dick's suggestion and look over the
old ones - at least they kept things together before!!!
John
On Tue, Apr 1, 2008 at 2:33 AM, Sally or Dick Taylor
<tr6taylor@webtv.net> wrote:
> John N.----Check the accuracy of the torque wrench by setting it at 45
> lb. and fit a socket to one of the wheel lug nuts. It should click well
> before the nut further tightens. You could also "practice" on a nut and
> bolt in a bench vice.
>
> Most of the time there's enough residual oil in the rod threads, so
> leave the bolts clean and dry. Compare their length to one of the known
> old bolts.
>
> Take a look at your old rod bolts. If they're not stretched (spin a nut
> down to the root thread) re-use them. Also question the place that sold
> you the new bolts, if the torque wrench checks out OK.
>
> Run a tap down the rod threads to cut out any metal pickup. They'll
> probably be allright, as deformation or stretching generally occurs in
> areas where the threads are not captive. (Unless a bolt bottoms out)
>
> Dick
>
> From: johncnorth@gmail.com(John North)
>
>
> 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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