<VV> Diagnose engine "knock" ?

[J R Read]

You have the rocker cover off.  Did you look to see if there is a loose 
rocker, a failing one, a broken spring, a nut backed off.  If there is a 
loose one with no obvious problem found under the cover, that one is the 
likely suspect for dropped valve seat.

Sounds as if you are already past the "inspection" point.

If the pushrod tubes are giving you a problem, there IS a tool for that if 
you would like to avoid crushing any of them.

Later, JR


----- Original Message ----- 
From: "Charles Lee" <Chaz at ProperProper.com>
To: <virtualvairs at corvair.org>
Sent: Friday, October 15, 2010 1:43 AM
Subject: <VV> Diagnose engine "knock" ?


>
> My theory is that gas in the exhaust comes from the exhaust valves, which
> are hanging open because the #3 exhaust valve seat has worked loose, which
> has also been causing the "knocking" before it was warmed up.
>
>
> I'm pulling the head and it should be out tomorrow (Friday), but I'm 
> having
> trouble with one pushrod guide bolt that pulled the stud out with it, and
> the pushrod tubes are stuck tight.
>
> What are the odds that I'll find a dislodged valve seat on #3 ?
>
> Charlie
>