<VV> adjusting valves

[James Davis]

A little math is in order.  The threads on the rocker studs are 
3/8-24, so each turn of the adjusting nut is 0.0417 inches.  Since 
the slack take up is on the pushrod and valve tip at the same time, 
the adjustment is 0.0833 inches each turn.  The the adjustment range 
in most lifters is 0.180 to 0.200.   The engine grows about 0.006 
inches for each 100 degrees Fahrenheit.  So now you can make an 
informed decision as GM did.
Jim Davis



  At 06:21 PM 11/2/2008, you wrote:
>Today's lifters (don't know about the ones sold as deep dimple) work 
>better with less preload.  I friend who owns a Corvair repair shop 
>tells me he uses 1/4 for his cars and his performance oriented 
>friends who understand they may be noisy when cold and 1/2 turn on 
>everyone else's car.  The range is actually really wide, they will 
>work just fine up to 1 turn for normal use.
>
>Dennis
>
>
>
>
>
> > Date: Sun, 2 Nov 2008 09:17:10 -0800> From: epssax at yahoo.com> To: 
> VirtualVairs at corvair.org> Subject: Re: <VV> adjusting valves> > 
> Richar Finch says turn the adjustment bolt 1/4 turn after the 
> rocker arm is snugged up. The factory manual says turn it one FULL 
> turn. Interesting! Ernie>
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