<VV> 110 engine bent and broken pushrod

[Harry Yarnell]

...or a pushrod guide installed upside down...
Harry Yarnell
Perryman Garage and Orphanage
hyarnell1 at earthlink.net
----- Original Message ----- 
From: <BobHelt at aol.com>
To: <rcbmc at bentonrea.com>; <virtualvairs at corvair.org>
Sent: Thursday, December 29, 2005 1:06 AM
Subject: Re: <VV> 110 engine bent and broken pushrod


> In a message dated 12/28/05 5:25:35 PM Pacific Standard Time,
> rcbmc at bentonrea.com writes:
>
>> When I grasped the end of the damaged pushrod to pull it out of the tube,
>> about an inch of the pushrod broke off. It appears to have broken at a 
>> factory
>> weld. I could see no damage to any other parts. I have no idea what might
>> have caused it to break.
>
> Richard,
> That is a strange failure and probably is metal fatigue or something like 
> the
> lack of hardening. There should be no welds like that on a stock pushrod. 
> The
> only explanation that I can think of would be that the tip of the pushrod
> wasn't hardened properly and it wore where it fits thru the guide, finally 
> just
> wearing all the way thru. Bent pushrods are usually due to one or both of 
> the
> following causes. A lifter cranked all the way down or a stuck valve (in 
> the
> guide).
> Regards,
> Bob Helt
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