<VV> Pinging

[BobHelt at aol.com]

Frank,
I have to agree with Joel here. Maybe you can tell when the  pushrods stop 
turning between your fingers but the average guy can't, and it  seems to be 
a problem area for newbies. The best way, In my opinion, is to check  the 
free axial movement of the pushrod (in and out movement) while turning the  
adjusting nut in very slowly, When the axial movement goes to zero then you 
are  at zero lash. You can easily do this by grasping the rocker and moving it 
up and  down.
OK, why is rotating the pushrod a bad idea? It is because it  is so hard to 
tell when you actually reach zero lash: if the lifter is new and  has no 
internal oil, or if the lifter has collapsed due a previous constant  pressure 
on it over time, or if the lifter is defective, the internal piston  will 
just move down inside the lifter and offer NO OR LITTLE RESISTANCE to  signal 
the zero lash point. Thus one will keep turning the adjustment nut until  
the piston bottoms and then the twisting will stop. Of course this is not 
zero  lash as desired. It will work ok if the lifter is full of oil, and 
actually  pumped up but there is no easy way of determining that so why take 
chances? 
 
Regards,
Bob Helt
 
 
In a message dated 3/21/2014 11:30:58 A.M. US Mountain Standard Time,  
joel at joelsplace.com writes:

Frank,
That method will have your adjustment all over the place  if the lifters 
have any oil in them.  If they don't it will have all the  valves open.  I 
guess if all the lifters were completely full that would  work.

1/2 turn from zero lash would be the way to do it.  I use  1/4 myself.  
Works great on anything with a similar lifter.
I agree  with Mark.  I'll try 1/8 on an engine with an Isky 280 I've had 
issues  with.
Joel  McGregor

________________________________________
From:  virtualvairs-bounces at corvair.org [virtualvairs-bounces at corvair.org] 
on behalf  of corvairduval at cox.net [corvairduval at cox.net]
Subject: Re: <VV>  Pinging

I also echo these replys. I use the 1/2 turn from when the push  rod stops
turning with fingers to set cold  adjustment.