<VV> cold valve adjustment :
Wed, 18 Aug 2004 12:48:37 EDT
In a message dated 8/18/04 1:53:57 AM US Mountain Standard Time,
> Bob ,as usual your post is exaustive!
> one question, however,
> why move the pushrod in-and-out and no rotate?
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.