Paul,
Randall certainly knows a heck of a lot more about Triumphs than I do,
but looking at the lobes on a cam shaft, it seems apparent that the
majority of the time the valve is going to be fully closed (or off
the peak of the lobe). Using the "nine rule" should put the valve
you're adjusting nearly opposite of the peak on the lobe (unless I'm
mistaken). It's fairly easy to tell when the valve is fully open, and
the valve you're watching doesn't have to be "exactly" fully open for
the one you're adjusting to be fully closed (which is where you want
it when you set it).
I may be completely wrong here, but I really don't see how the valve
you're checking cannot be fully closed if the one you're opening is
open at all when using the nine rule.
--
Kurtis Jones
Russellville, Arkansas
1963 TR4 - CT19389L
1959 AH Bugeye - AN5L23250
www.geocities.com/tr4_1963
On Wed, 23 Mar 2005 22:05:38 -0500, Paul Dorsey <dorpaul@negia.net> wrote:
> Hi,
> I'm several weeks away from ever having had my TR3 running, so I also want
> to learn how to adjust valves!
>
> It seems as if the method Randall describes is most accurate cause 180
> degrees opposite the TDC can be measured exactly. Whereas, "the nine rule"
> isin't as accurate because one has to make a judgement call as to when each
> valve is fully open by oberving ether the valve stems or through the spark
> plug hole.
>
> Am I right or wrong about this?
>
> Thanks, Paul Dorsey
> 60 TR3A
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