Mailing List flyrotary@lancaironline.net Message #1864
From: rv7rotary <rv7rotary@knology.net>
Subject: Metric-to-AN fittings for oil return
Date: Thu, 5 Jun 2003 23:30:03 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Re: [FlyRotary] oil return location?
From a previous post...
The front cover oil outlet fitting is a 16mm X 1.5, and the drain plug appears to be a 14mm x 1.5 (haven’t verified that yet).  The mystery port for oil return is an 18mm x 1.5.   Maybe the drain plugs were different sizes in different years, but it doesn’t look like this one will be fitting anywhere else.   
 
Now that I’ve discovered these fittings, I’ll probably return the redrive oil directly to the pan, via a 14mm to AN6 fitting that I’ll put in the drain plug hole.  The added bonus to this will come when it’s time to drain the oil.  My drain plug is over the radiator, and would have been a mess to change oil.  Now, all I have to do is remove the flex hose at the bottom of the redrive, and lower it below the level of the oil pan.  Pretty neat :-)  
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An inexpensive source for metric-to-AN fittings is:
 
 
Chris Sargent
Just getting started
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