Chris,
One thing that will absolutely prevent the
oil pump from pulling oil from the pan is ANY kind of air leak (even very tiny)
between your pickup and pump. The pump will primarily suck air rather
than oil. You mention getting a small amount of oil – in my opinion
– if the pump is capable of pulling up a small amount of oil but not what
you expect, there may well be a leak that permits the easer sucking of “light”
air rather than that heavy oil.
If you did not use a gasket between oil pickup
and pump pickup entrance, that can cause a leak depending on how smooth the
mating is between the pick up and the block.
If you do have a leak then priming the
pump may not be effective - because even a tiny leak will break your “vacuum”
between pump and oil.
Good luck
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of The Mallorys
Sent: Sunday, March 01, 2009 7:58
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Still low oil
pressure
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
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