X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3522843 for flyrotary@lancaironline.net; Sun, 01 Mar 2009 22:18:51 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.122; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta04.mail.rr.com with ESMTP id <20090302031813.EQUF12934.cdptpa-omta04.mail.rr.com@computername> for ; Mon, 2 Mar 2009 03:18:13 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Still low oil pressure Date: Sun, 1 Mar 2009 22:18:28 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0021_01C99ABB.A5D373B0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 thread-index: Acma0hFAubxscZoQRZijcDOsRcx3nQAEyNxA Message-Id: <20090302031813.EQUF12934.cdptpa-omta04.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_0021_01C99ABB.A5D373B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm _____ 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 __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_0021_01C99ABB.A5D373B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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



__________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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