Thanks to all for the assistance on my shim question. My recollection is there
were two but I could not remember from which two posts. They were thin about
.010". The engine is original, I have owned the car since 1970 and this is the
first overhaul so these must have been factory installed. I have ordered two
from Moss and hope to get the engine back together soon.
Thanks again to all for the comments, sorry I forgot my tag on the orginal
message.
Don Hicks
Connecticut
70 BGT " Morris"
neil.cairns@virgin.net wrote:
> Hicks wrote:
> >
> > I need some technical help from the experts out there on my 70 B
> >
> > I am reasembling the rocker assembly to the head and remember at least
> > one gasket under one of the rocker posts between the bottom of the post
> > and the head. . I can't seem to find it in my parts. Very thin gasket
> > like material. I think it was on the post that has the oil passage way
> > in it. Anyway, none of the manuals that I have comment on this gasket.
> > The Moss catalog shows it but calls it a shim for the center. Can anyone
> > comment on this. Is it critital and if it is a shim what's the
> > measurement. Also does it require one on each of the three post or just
> > one? Do I need this at all?
> >
> > TIA. As always, the advise it most helpful.
>
> The 'gaskets' are infact ten-thou shims, often placed there to make up
> for any head skimming that may have been done. The .010" lifts the whole
> set of rockers, and is supposed to put the rocker-arms back at their
> correct operating arc.
>
> Having said that, I have found many 'B' series engines with just a shim
> under the two middle posts, as if to bend the rocker shaft slightly in
> service....or someone had forgotten the two outer posts!!
>
> It is not a gasket, and I would think you can throw it away, as .010"
> will not make that much difference, especially on a worn engine with the
> wear those rockers get. I have never seen any reference to these shims
> as a factory fitted bit, in 37 years of pulling engines to bits.
>
> Neil.
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