Re: [Mgs] rocker threads causing problems

["riverside" <riverside@southslope.net>]

I'll go with stretched studs as the answear to the problem. I've had this 
problem several times.
The  5/16" stud apparrantly stretches easily when overtourqued.  Change the 
stud, use another new 5/16-28 unf nut and the original hardened washer if 
you still have it.
Ron Sanborn
----- Original Message ----- 
From: <willis042@aol.com>
To: <crk@godblessthe.us>; <MG-MGB@yahoogroups.com>; <mgs@autox.team.net>
Sent: Friday, October 08, 2010 5:02 PM
Subject: Re: [Mgs] rocker threads causing problems


> Hmm...just one other thought...
> Perhaps some prior twisting of the ole nuts was done by the average
> Neanderthal, wherein he twisted the nuts til they felt weird and then 
> backed
> them off a quarter turn!
> ?
> In doing so the stud itself could have become stretched (it always 
> stretches
> in the threads) so that when applying a new nut, the nut goes down to the
> stretched part, looses contact with the reduced diameter stud
> and...voila...pulls its little threads out!
> ?
> Try a different set of studs, or at least pull one and check the diameter 
> all
> along the threads.
> ?
> studs an nuts ...what a combo...
> ?
> Willis
> ?
> ?
>
>
>
>
> -----Original Message-----
> From: Clayton Kirkwood &lt;crk@godblessthe.us&gt;
> To: MG-MGB@yahoogroups.com; 'MG List' &lt;mgs@autox.team.net&gt;
> Sent: Thu, Oct 7, 2010 12:25 pm
> Subject: [Mgs] rocker threads causing problems
>
>
>
>
> Hi,
>
>
>
> I am putting my rocker assembly back on my head after putting new valve 
> stem
> oil seals in in an attempt to see where my oil consumption is coming from.
> While tightening the nuts down on the studs, I continue to have a problem
> with the threads of the nuts ripping out. I went to the local parts store
> and asked for grade 5 nuts hoping that the problem was with the nuts being
> ungraded. I continue to have the same problem: I tighten the nuts down to
> 25lbft but they never tighten and I remove the nuts and then have to 
> remove
> metal twists from around the studs. 25 lbft is the value listed in the
> manual.
>
>
>
> What is going wrong? My guess is that the "grade 5" nuts really aren't 
> grade
> 5, but I have no way of telling: the flats don't have any markings. I know
> these have to be pretty tight given all of the stresses caused by the cam
> pushing on the rods. Any advice appreciated.
>
>
>
>
>
> TIA,
>
>
>
> Clayton
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>
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