<VV> Bent Push rods
jvhroberts at aol.com
jvhroberts at aol.com
Thu Oct 8 17:23:43 EDT 2009
Could also be a stuck valve, jamming in the guide.
From: Bruce Schug <bwschug at charter.net>
To: VV <virtualvairs at corvair.org>
Cc: Jeff <jirwin2 at insight.rr.com>; Michael Kovacs <kovacsmj at sbcglobal.net>
Sent: Thu, Oct 8, 2009 3:31 pm
Subject: Re: <VV> Bent Push rods
Pretty good list. I'd add over-revving. I think that if you over-rev
it you can reach a point where the pushrod isn't strong enough to keep
everything going and it bends.
On Oct 8, 2009, at 3:22 PM, Michael Kovacs wrote:
> Lets see if analysis is right:
> The lifter is pushed by the cam.
> The lifter moves the push rod.
> The push rod interfaces with the rocker arm.
> The rocker overcomes the valve spring pressure.
> The valve stem moves inside the valve guide.
> The valve opens in time to miss the piston.
> Things that can go wrong??
> The valve hits the piston.
> The valve stem binds in the valve guide.
> The rocker arm doesn't move.
> The valve spring is broken.
> I has a similar incident with a 460 Lincoln. The rocker arm cocked
> (nut came loose) and the push rod did not like it. Replaced the
> rocker arm and stuff. Ran fine after that.
> Any body else have a clue. I'd like to know too.
> MIKE KOVACS
> ----- Original Message ----
> From: Jeff <jirwin2 at insight.rr.com>
> To: virtualvairs at corvair.org
> Sent: Thursday, October 8, 2009 1:57:30 PM
> Subject: <VV> Bent Push rods
> We have a 110 motor and the pushrods on #2 cylinder get bent. We
> have replaced the lifters to try and cure, but the problem still
> exists. Has anyone had this happen?
Bruce W. Schug
Treasurer, Membership Chairman
CORSA South Carolina
Stock Corvair Group
Performance Corvair Group
CORSA member since 1982
bwschug at charter.net
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