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Much has been said
about valve adjustment, special tools that hold the
.004"(.10mm)shim, and the "feel" when things are proper.
I agree that you can develop a feel with the available tools and
experience to accurately set the gap. People do this every day and
think nothing of it.
That said, there is some trepidation doing this for the first time.
Particularly when you don't have a experienced mechanic looking over
your shoulder.
So once you do all the adjusting, pushing and pulling, looking for the
"feel": how do you really know you've got it right?
Once you have the gap at .004"(0.10mm), it is difficult to reinsert
the shim. Almost at the risk of damaging the edge of the shim.
So you make a note of the screw position, loosen things up, reinsert the
shim and reset everything until you feel confident the adjustment is OK.
Maybe you can get the shim back in between the foot and the valve, so
you can recheck.
Unless the motor is out you find yourself in awkward positions, working
by feel rather than actually seeing what is going on.
A simpler way to "check" the adjustment is to slip a
.003" shim between the other side of the rocker and the back of the
cam lobe. If the .003" shim will not fit in between the gap
is not over .004".
At least not enough to worry about. Why? When the foot to valve gap is
at .004" the gap between the rocker and the back side of the cam
works to .00285" This is too close to allow a .003" shim
in. So now you have a "over guage" If the .003"
shim fits your setting is loose.
Now you check the gap between the back of the cam and the rocker with a
.002" shim. If you are under .003" at the foot to valve
gap, the .002" shim won't go. So now you have a "under guage"
So if three thou. won't go and two thou. goes relax your are very close.
Do this a few times to check yourself. Once you get the "feel"
this may not be necessary. If your anal like most of us, you'll
check 'em all.
The nice thing about this check is the rocker and cam don't have sharp
edges so the shim is guided into place. Much easier than reinserting
under the "elephant foot"
Sounds like a lot of work. Try it, it works.
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