[Mgs] rocker threads causing problems

[willis042 at aol.com]

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 <crk at godblessthe.us>
To: MG-MGB at yahoogroups.com; 'MG List' <mgs at autox.team.net>
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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