<VV> compression test

[John O'Shea]

Looks like we're ready to go again with the hot/cold valve adjustment 
banter.  This will be the 534,127,001 time this has been hashed out on VV. 
All neo-automotive engineers please chime in with your superior knowledge of 
how to adjust Corvair engine valves.  All newbies please pay attention to 
the neo-engineer experts.  Those GM engine designers.  What did they know 
anyway?  And that valve adjustment procedure in the shop manual.  Who pays 
any attention to that anyway?  Let's hear it boys!
Jack (stirring up the pot) in Las Vegas  :-)


----- Original Message ----- 
From: "Mark Durham" <62vair at gmail.com>
To: "Harry Yarnell" <hyarnell1 at earthlink.net>; "Bruce Alexander" 
<brucealexander11 at yahoo.com>; <virtualvairs at corvair.org>
Cc: <judynrandy at comcast.net>
Sent: Saturday, October 15, 2011 10:39 AM
Subject: Re: <VV> compression test


> Harry, you may be expert at setting valves cold, but most don't have
> the expertise to do so. I did my engine that way when building it up,
> but its less accurate once the lifters have pumped up and seated,
> because its harder to find that zero lash position. And, unless the
> lifters are NOS 60's vintage setting the lash at one turn will do
> exactly the problem Bruce had in the first place as newer lifters
> should be adjusted no tighter than 1/2 turn. The newer lifters are
> designed differently internally and have less to play with in
> adjustment. Mark Durham
>
> Sent from my Windows Phone From: Harry Yarnell
> Sent: Saturday, October 15, 2011 9:28 AM
> To: Bruce Alexander; virtualvairs at corvair.org
> Cc: judynrandy at comcast.net
> Subject: Re: <VV> compression test
> A lifter is holding the valve open. Book calls for one turn past zero 
> lash,
> but 1/2 turn is ok.
> Hydraulic lifters don't always bleed down quickly in static mode, but will
> when run.
> I am assuming you're adjusting them cold and by the book (let's not get
> into adjusting them warm like SOME folks do).
>
>
> -----Original Message-----
> From: virtualvairs-bounces at corvair.org
> [mailto:virtualvairs-bounces at corvair.org] On Behalf Of Bruce Alexander
> Sent: Saturday, October 15, 2011 11:36 AM
> To: virtualvairs at corvair.org
> Cc: judynrandy at comcast.net
> Subject: <VV> compression test
>
> I have re- assembled my 64 110 engine after a "re-seal" Did a compression
> check. All but two cylinders looked Ok  ( within 10 lb. of 145 lb).  #'s 3 
> &
> 5 read 0. I backed off the valve adj. on those two cylinders, re-tested 
> and
> got 160 & 175 lb.s can anyone tell me just what this might indicate?  such
> as bad rings, bad valves or what?
> ...,Bruce
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