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Vernatherm stuck open?

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recapen(at)earthlink.net
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Posted: Tue Dec 01, 2009 7:31 am Post subject: Vernatherm stuck open?

Folks,



I think my Vernatherm is stuck in the open position allowing oil to always flow through the oil cooler.



Here's the basis for my thinking:



In October during some of my flights, I was seeing OAT's of 35 and 40 with corresponding OilT's of 174 and 179.



In November during one flight I had OAT of 62 and OilT of 177 - I stopped and had lunch - during the flight home, I had OAT of 65 and OilT of 146.  Yes plenty of time for it to have warmed up...and no, I didn't change anything on the airplane during lunch.



All flights after that one have had OAT's in the 50's and 60's with OilT's not breaking 140.



Your thoughts please... How do I unstick the Vernatherm?  Is it possible that during lunch that day, my rings seated and my engine finished its break-in process?



Thanks,

Ralph

RV6A N822AR (at) N06 46.3 hrs - happy with the CHT's, found something else buggin' me

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dsleepy47

Joined: 15 Dec 2007
Posts: 41

Posted: Tue Dec 01, 2009 10:10 am Post subject: Vernatherm stuck open?

Actually a vernatherm is in the cooler bypass port so it closes to force oil through the cooler and opens to bypass the cooler so an open or leaking vernatherm will raise temperatures.

 see: http://www.sacskyranch.com/eng18.htm

  

 Deems



 

[quote] Date: Tue C 1 Dec 2009 10:29:49 -0500

 From: recapen(at)earthlink.net

 To: rv-list(at)matronics.com; lycomingengines-list(at)matronics.com

 Subject: Vernatherm stuck open?

 

 --> LycomingEngines-List message posted by: "Ralph E. Capen" <recapen(at)earthlink.net>

 

 Folks C

 

 I think my Vernatherm is stuck in the open position allowing oil to always flow through the oil cooler.

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dsleepy47
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