<VV> cold valve adjustment :

[philippe.esteve4]

ok ,Bob : clear and logical !

Philippe,
If your lifters are pumped up solid, then there should be no problem. But
likely one or more lifters will not be fully pumped up. That is because valve
spring pressure over time tends to collapse the lifters (depending of course
on which valves are open at the time). Anyhow unless you are 100% positive
that all of your lifters are fully punped up, then you shouldn't use the
twisting motion. Why? Well when doing the actual adjusting, is is almost
impossible for most Corvair people to be able to detect when the zero lash
point is reached, because the pushrod won't bind if the lifter is not fully
pumped up. By twisting, you are looking for a free motion of the pushrod until
the zero lash point is reached, and at that point the twisting should bind and
you can no longer twist it. But if the lifter is not fully pumped up the
pushrod won't bind as the lifter is collapsed by tightening the nut past the
zero lash pointh.

By using the in-and-out movement, the motion will stop exactly at the zero
lash point whether the lifter is collapsed or fully pumped up.

I hope that this helps.
Regards,
Bob Helt