Mailing List flyrotary@lancaironline.net Message #59793
From: Chris Barber <cbarber@texasattorney.net>
Subject: damn front o-ring again revisited again again again......sigh
Date: Sat, 11 May 2013 23:27:24 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Todd Bartrim....you still here?

 

To add insult to injury, after loosing my engine over Pearland Regional Airport (LVJ) a few weeks ago, which we seem to be able to attribute to some gunk found in the Mistral fuel rail clogging the small return orifice, I am also having low oil pressure AGAIN.  I have yet to pull the front cover, however, I am leaping to the conclusion that the front cover o-ring is causing the problem.  I have tried to address this issue several times now.  I have installed the extra support ring provided by Maztatrix.  I use no gasket and still have a problem.

 

Similar to you, I installed a small tube in the passage last time I messed with this to hopefully prevent the oil ring blowing out....if I understand correctly due to cold start pressure.  However, unlike you, mine was just pressed in aluminum tube modified to fit with holes drilled in the tube to still allow flow if the tube dislodged.

 

How is your modification working?  What thoughts do you, or others, have?

 

I think I know the other things that could cause low pressure and do not think they are the issue (such as the pump retaining key slipping out, pressure regulator falling out as it safety tied etc).  It is a new oil pump replaced the last time this problem happened.

 

I hopefully will get out to the hangar I rented at LVJ tomorrow and remove the cover to know more but am curious about your success or lack of.

 

Thanks

 

Chris Barber

Houston

Ellington Field (EFD)

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