<VV> Bent Push rods

[jvhroberts at aol.com]

 Could also be a stuck valve, jamming in the guide. 


 


John Roberts

 


 

-----Original Message-----
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.

Bruce


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
67AC140
bwschug at charter.net



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