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Subject: Re: [FlyRotary] Oil Pressure AGAIN
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From: Scott Emery <shipchief@aol.com>
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Date: Fri, 21 Jun 2013 16:19:12 -0700
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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I'm paying close attention to you plight, as I have my engine apart too.
In your case I would suggest you verify the accuracy of your oil gauge, and m=
aybe test pressure nearest to the pump discharge, then test at points downst=
ream. It may be that your engine is ok but an oil hose has a flap of hose li=
ner restricting flow or partially clogged cooler etc.

Sent from my iPhone

On Jun 21, 2013, at 3:58 PM, Chris Barber <cbarber@texasattorney.net> wrote:=


>=20
> Well, if any of y'all are curious about my progress, I am grounded in Phas=
e One.=20
>=20
> I am having oil pressure problems again. The frustration is huge. To add t=
o this, most of the archive searches I have made give results that prominent=
ly feature my inquiries. <sigh>
>=20
> Following my engine out over the airport in April traced to gunk in the fu=
el rail, mods were made to the fuel system. During static tests the oil pres=
sure would never come up to expectations.=20
>=20
> Hoping to lick the front o-ring problem that I have had SEVERAL times now,=
 I pulled the front cover to take a look see. The o-ring was torn.=20
>=20
> I choose to be more assertive in trying to address this problem. I modifie=
d a brass fitting by grinding the OD to make it it cleanly fit inside the fr=
ont iron (also, ground the inside diameter to keep flow as close as possible=
 to stock) and tapped the front housing to accept the fitting to screw in. I=
 then placed an o-ring around the fitting. I did not include the silicone ri=
ng this time as it kept preventing the smooth mating it the iron and cover.=20=

>=20
> While apart, I verified the woodruff key was properly installed in the oil=
 pump. The oil pump was replaced last time the cover was off. I also verifie=
d the oil pressure relief valve. It was still in place (not surprising since=
 it has been safety wired in following it falling out once).=20
>=20
> I buttoned everything back up being meticulous that the o-ring mod seated p=
roperly. However, my oil pressure is still low. It's in the twenties (psi) w=
hile idling. This is not too bad as Racing Beat states this is acceptable at=
 idle. But, when I rev it up to as much as 6000 (only long enough to verify t=
rend) it only goes into the 30's. NOT acceptable.=20
>=20
> The engine has had carb jets replace the e-shaft ball. I believe this can l=
ower the oil pressure a bit. Also, there is a front oil cooler installed. Th=
is necessitates about a 12 foot oil line run. It is plumbed in parallel. Thi=
s could provide a bit lower pressure too I think.=20
>=20
> I  using a mixture of Royal Purple 30, 40 and 50 oil. I added what was ava=
ilable at the time.
>=20
> I have yet to check the oil pressure regulator. I specifically remember in=
stalling it to torque with blue lock-tight last time I had access.=20
>=20
> I plan to isolate the engine from the coolers and filter and take readings=
 using a mechanical gage. Currently I have two electronic gages, one for the=
 RWS monitor and one for the SkyView monitor. They both read within a couple=
 of psi from each other.=20
>=20
> If not for this Achilles Heal I would very likely out of Phase One and pla=
nning a trip to Osh. It has been a major distraction of energy and time.=20
>=20
> I know it could be bearings but the stationary gears and bearings were rep=
laced at the last rebuild. Everything else seemed in spec.=20
>=20
> The front eccentric thermostat was replaced with the plug.=20
>=20
> The oil is flowing as the system heats up evenly. I need to see if the hos=
es are hard while running, as the no-pistons site says, hard like a brick.=20=

>=20
> Insight as to what may be my problem and diagnostic course is always appre=
ciated.=20
>=20
> I hope I have provided enough info and not omitted relevant information.=20=

>=20
> I really can't express my annoyance/anger/disgust properly.=20
>=20
> Thanks again folks.=20
>=20
> Chris Barber.=20
> Houston
> Velocity 13b
>=20
> Sent from my iPhone 5
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List=
.html