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Date: Sun, 01 Mar 2009 21:52:08 -0600
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Still low oil pressure
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Where are you measuring pressure, & are you using a remote filter? FWIW, 
at least one person that was using a remote mounted filter got the 'in' 
& 'out' reversed. Some (most?) filters have check valves & won't pass 
oil in reverse.

Charlie

Tracy Crook wrote:
> Really hard to draw any conclusions without knowing what 'a little 
> flow' is. At cranking speed it should be enough to make a good sized 
> puddle on the floor in 3 - 5 seconds. Does your first paragraph imply 
> that there was more oil flow before the filter than after it? If true, 
> that is suspicious.
>
> If you still suspect priming as the problem, have you tried to force 
> some heavy weight oil (40 - 50 wt) back toward the pump with air 
> pressure? If there is any significant oil flow through the pump, it 
> ought to prime immediately unless it is a totally clapped out pump.
>
> BTW, are you sure your oil pressure reading was accurate and not just 
> an instrument problem?
>
> Tracy
>
> On Sun, Mar 1, 2009 at 7:58 PM, The Mallorys 
> <candtmallory@cebridge.net <mailto:candtmallory@cebridge.net>> wrote:
>
>     No luck today.
>
>     I filled the line out of the engine just after the pump, then
>     cranked it over with the starter. I did get a little flow, but not
>     very much. I reconnected the hose, and added components as I went,
>     checking that I had oil flow after each. Still had flow after the
>     cooler and just barely a trickle after the filter, where the oil
>     should go back into the engine. From this I am thinking either I
>     am not picking up enough oil, or the pump isn’t pumping enough oil.
>
>     The only way I can think to eliminate the oil pickup as a problem
>     is to drop the pan, and feed directly into the engine from a
>     container. This will be a little bit of a pain, as I will have to
>     remove the radiator, drain the pan, then remove it.
>
>     I don’t know how to check the pump. Any ideas or suggestions? Is
>     there a way to check it without removing the rear eccentric shaft
>     bolt? It was a royal pain to remove last time, and I really don’t
>     want to have to remove it again if there is another way to check
>     that the pump is pumping.
>
>     I am not using the apex seal oil pump. All I did was cap off the
>     hole on the outside of the block, and left all the internal parts.
>     I don’t think this should make a difference, but thought I would
>     mention it in case.
>
>     Chris
>