<VV> Intake Valve Problem / Corvairitis IS Infectious!

[D. Barry Ellison]

Although I've got no experience with this particular situation, I suspect 
it's possible.

If the exhaust valve is letting all the air out (no air/fuel mixture since 
intake valve is staying closed), the next down stroke is to draw air/fuel in 
creating a vacuum.  W/o the intake open and worn rings, (or gaps lined up, 
or broken ring, etc) it seems you could get some blow by.

But I would think something else would have to be wrong, too, like a broken 
ring or piston hole.  I guess it depends on how much smoke you're getting.

Personally, I'd double check the head stud in the case, reinstall, do a 
compression check.  If all is good, drive on.

Barry in SC
2 lates, 2 earlies





>From: Western Canada CORSA <westerncanadacorsa at shaw.ca>
>Reply-To: westerncanadacorsa at shaw.ca
>To: "WCC List Server (WCC List Server)" 
><corvairs at cybrus.net>,virtualvairs at corvair.org
>Subject: <VV> Intake Valve Problem / Corvairitis IS Infectious!
>Date: Wed, 15 Aug 2007 00:23:46 -0700
>
>I just finished up pulling the head off a 140 belonging to WCC's newest
>member.  She's been a friend for 10 years, and it would appear that
>Corvairitis IS infectious.  She has succumbed to the constant exposure.
>
>I'll lay out the symptoms to see if anybody has ever experienced anything
>like this before.  She just purchased this car, and it didn't come from
>"with in" so to speak so we don't know all it's history.  Other than the PO
>said the smoking described below came on gradually.
>
>It was smoking constantly from the pass. side bank.  White smoke, so it's
>oil related.  I figured it was a bad guide.  There is no evidence of 
>blowby,
>nothing is being pushed up the dipstick.
>
>However, when we pulled the rocker cover, the lower stud nut for the #5
>Intake had almost completely backed off.  Not the ball nut mind you, the
>whole rocker stud.
>
>Would an intake valve not opening cause an extreme vacuum situation during
>the stroke that would result in oil being drawn past the rings?
>
>Regards,
>Joel
>
>
>  _______________________________________________
>This message was sent by the VirtualVairs mailing list, all copyrights are 
>the property
>of the writer, please attribute properly. For help, 
>mailto:vv-help at corvair.org
>This list sponsored by the Corvair Society of America, 
>http://www.corvair.org/
>Post messages to: VirtualVairs at corvair.org
>Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs
>  _______________________________________________