<VV> valve adjustment

[Bryan Blackwell]

I do it by feeling for the 'click' to go away when rocking the rocker arm, I can get to within an 1/8th turn of zero.  I like the paper for a feeler gauge, I'll pass that one along.

One note for anyone doing the 'hot' method - when you back the adjusting nut off, make sure it 'clacks' for several seconds.  If you have a slightly sticking lifter it may not really be at zero.

A point often missed by the 1/4 turn from zero advocates is that the lifter is intended to run at zero lash.  The 1/4 turn spec is for racers who were having problems with the lifters pumping up at high RPMs and floating the valves.  This isn't an issue below 5000 rpm or so with an 891 cam, so using the 1/4 turn spec isn't required for most general use Corvair engines.  I find 1/2 turn works pretty well, it allows for some adjustment error (that 1/8 turn above).

--Bryan

On Aug 29, 2010, at 10:04 PM, Matt Nall wrote:

> because people had a hard time telling where zero lash was cold
> and without the engine running.
> 
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> 
> I always suggest to the people that don't understand what it is they are doing...
> 
> 
> Use apiece of paper between the stem and rocker....no slip means 0  or less lash.
> 
> 
> I use my finger on the top of the rocker..I can feel when clearance reaches ZERO.