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oinl distribution within the engine block

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dsleepy47

Joined: 15 Dec 2007
Posts: 41

Posted: Fri Nov 20, 2009 5:04 am Post subject: oinl distribution within the engine block

Try this file:

Deems

Date: Fri C 20 Nov 2009 04:08:11 -0800

From: ad4hk2004(at)yahoo.com

Subject: LycomingEngines-List: oinl distribution  within the  engine block

To: lycomingengines-list(at)matronics.com

Jack C

The oil cooler is a full flow as long as there is not excessive back pressure C such as the oil congealing in the cooler... Once the back pressure reaches a set point it blows open a bypass valve that sends the oil around the cooler...  

As far as the order in which the oil circulates through the passages very roughly (from memory)

1. main oil gallery in right crankcase half to:

A) Main bearings C and through them in spurts to the connecting rod bearings

B) From rear main bearing to:

     a] crankshaft idler gears

     b] cam bearings

     c]hydraulic tappets

     c]push rods (spurts again)

     d] rocker arms  (which are at the end of a very long C tortuous path of spurts)

     e] and finally the  valve stems get coated from oil mist (which is why they wear like crazy)

Someone who really knows can chime in...

denny / k8do

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ArticlesOilFilterKitsHi-Temp.pdf

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_________________
dsleepy47
N1491R

javisteele(at)sympatico.c
Guest

Posted: Fri Nov 20, 2009 6:55 am Post subject: oinl distribution within the engine block

Hi Denis,

  

  Thank you for the reply and for the printout.   Just the thing that I needed,

  

     The problem is on a friends  0-290  Miranda aircraft  he has  very hot oil temps  and as  he doesnt understand the problem  I am  trying to help.   Therefore the request for information.

    The engine runs well  but the oil temps  get to 245 degrees  with in ten minuets  but  do not  cool  down much  when running at 2000 RPM.  ie  goes down to 240  degrees. 

  

     Thanks again,

  

 Cheers,

  

  Jack Steele

  Ontario, Canada

 [quote]   ---

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