Thanks for that explanation. Like I said, my head had these shims, but I
didn't know what they were for. I thought they were adjusting for production
tolerances.
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
on 7/13/09 1:44 PM, Barney Gaylord at barneymg@mgaguru.com wrote:
>...
> Moss Motors does sell the rocker pedestal shims, but they are not
> originally intended for that purpose. Later engines had 0.010" shims
> under #2 & #3 pedestals only to put a small bending preload on the
> rocker shaft to keep the shaft from wiggling about in the pedestal
> bores. None of my engines for decades have ever had these shims, and
> I have never seen any detrimental effect from their absence. You can
> could install some of these shims under the pedestals to open up the
> rocker clearance, but it seems like treating the symptom rather than
> curing the disease.
>
> Barney Gaylord
> 1958 MGA with an attitude
> http://MGAguru.com
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