[Shotimes] Slight ticking from below intake

[Ron Nottingham]

----- Original Message -----
From: "Josh Salaets" <jsalaets@msn.com>


> > This is the 1st time I have heard this. Where do you get this
information.
> I've
> > heard you need to check the condition of all the shims as well as
> clearance,
> > never replace them all. Perfromance-Plus and FPS don't do it. As a
matter
> of
> > fact, if I needed a different sized shim, they would take an old one out
> of
> > their parts bin and put mine in for someone else.
>
> I think this is likely a case of "Internet Paranoia."  Yamaha motorcycles
> and BMW M engines both use the same cam on bucket design that the SHO
uses,
> and when replacing these shims, you can reuse the old ones (which are
> probably the EXACT same shims we use).  As far as I can tell, the shims
are
> made out of one alloy all the way through, so reusing them would have no
> negative consequences.
>
> All of the valve adjustments I've done (both SHO and BMW) involved reusing
> existing shims, which looked BRAND NEW except for the oil "stain" on the
> bottom side of the shim.  I obviously wouldn't recommend using a shim that
> shows obvious wear or grooving, but if it looks good, then reuse it.  Why
> not?

Triumph used the same cam on bucket design also, in the Stag 3.0L V8, and
the TR7 2.0L I4.  Incidently, SAAB also used this design on their early
4-cylinder engines (which was close, but not entirely identical to the TR7
I4) in the 99 and 900 series.  Others, such as Lotus, used this same design.
If the shim did not show signs of wear, it is ok to reuse, as others have
said.  I'm not knocking any "gurus" out there, but I take some sources a
little differently, especially when their business is in repair (the more
they do/sell, the more $$$$ they make).

Ron N. - Dalton, GA
90 SHO