The rocker gear needs to match the head.
The crucial part, really, is the oil feed through the rear rocker pedestal --
it is located in a different place in an 18V motor. If the rocker pedestals
and the head are not matched, no oil gets to the rocker shaft or to the tops of
the valves! This is a Bad Thing.
Tappets and pushrods, if matched to each other, are interchangable.
Matt
"Andrew B. Lundgren" <lundgren@byu.net> wrote:
>
> If I am not mistaken the 18V set (short tappets, long rods) and the 18G
> set (long tappets, short rods) should be used as a set with the rockers
> that go with them.
>
> When putting the head from my 18Gd on my 18V engine, I used the 18V
> rods, tappets and rocker on the 18V, I don't thing you are supposed to
> swap them, the people at NWImport made a point of warning that the
> correct set needed to be used.
>
> Larry Hoy wrote:
>
> > Can anyone tell me which engines used the short tappets and the long push
> rods?
> >
> > Is the above combination the same overall length as the long tappets and
> the short push rods?
> >
> > Which means these two combinations are interchangeable. Right?
> >
> > Larry Hoy
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