The head studs don't have a problem and they are like 1/2 inch. These are
the 5/16 rocker only studs. I bought new studs and have the same problem
with the new nuts which were supposed to be grade 5. I went today to ACE and
hopefully these nuts are truly grade 5. Thread count is 24. I will check
with the newest nuts tomorrow. I'll be back.
Clayton
-----Original Message-----
From: gordies garage [mailto:mg_garage@comcast.net]
Sent: Friday, October 08, 2010 6:39 PM
To: Clayton Kirkwood; 'MG List'
Subject: Re: [Mgs] rocker threads causing problems
Back to the original question, since some of the rocker studs are also head
studs, have you experienced the same on the other head studs, or are the
head studs okay? You did remove all head nuts in the reverse order of
tightening, right?
Can you get it tight with a normal 8" or so ratchet without stripping? If
so, then a old bar torque wrench is in order. I periodically check my
clicker against the bar to make sure it is still close.
Others have said that grade 8 wouldn't help, but I'm not so sure.
As to the thread, it is standard SAE.
HTH
Gordie
'62 MGA
'67 BGT
> 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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