X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost03.isp.att.net ([207.115.11.53] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5052295 for flyrotary@lancaironline.net; Thu, 14 Jul 2011 23:20:54 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.53; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-108-10.mco.bellsouth.net[98.85.108.10]) by isp.att.net (frfwmhc03) with SMTP id <20110715032018H03002sk7de>; Fri, 15 Jul 2011 03:20:18 +0000 X-Originating-IP: [98.85.108.10] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Oil Pressure Again Date: Thu, 14 Jul 2011 23:20:21 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CC427C.9AC436B0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcxCgSjS38K1CBeOT5KGVw2KI6kClgAG7y2w X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01CC427C.9AC436B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Chris, Is there a possibility that your pickup is sucking air? With the conversion concepts plate, I had to add a half inch spacer to the pickup to make it reach the bottom of the pan. If you did this, you may be leaking air around the pickup at one of the two joints on top and bottom of the spacer.. If you do, it will not pump much oil. You could put some kind of pookie around the joints to temporarily seal them to see if there is a leak. It that solves the problem you would need to remove the pan again and fix the seal. If it doesn't you would still have to remove the pan to remove the temporary pookie. Probably make more sense if you just assumed a leak and sealed it really well and put the oil pan back on. If it fixes it.Yay!!! Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris Barber Sent: Thursday, July 14, 2011 7:52 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Oil Pressure Again I am running 40 weight. I am letting the oil warm up but hesitate running too long since the pressure is low. Chris _____ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Chris Barber [cbarber@texasattorney.net] Sent: Thursday, July 14, 2011 6:46 PM To: Rotary motors in aircraft Subject: [FlyRotary] Oil Pressure Again I hesitate asking about this again, but I am too close to possibly flying to drop the ball too much now. I have a drop in oil pressure again. It has dropped from the high 60's or so to between 20 psi to 40 psi (20 to 30 at lower RPM and only up to around 40+ as I increase power). My first thought was that it was the front o-ring and silicone ring in the front cover. So, I pulled the front pan and replaced it. I also was able to check the front pressure port and the oil pump chain/key/washer etc and all was good. I am about to have to pull the engine to check the bottom of the engine for the oil pick up and rear port (after checking the hoses, but I would thinking a blockage, depending on where it is, would increase pressure). One of the disadvantages of the Conversion Concepts mount is that I pretty much have to pull the engine to check the bottom end. My question is, other than the mentioned items, what else could cause this sort of drop. I have hooked up a mechanical pressure gage (instead of the RWS EM2). My concern is that it may be the front bearing as it was the only part I recall being closer to being out of spec. I hate the idea of having to tear down the engine again to replace this part especially since the engine is running all but perfectly and I was doing squawks preparing for my DAR inspection before this issue crept up. Also, even though I can't think of a way, is there any way to replace the front stationary gear/bearing without cracking the engine...just had to ask as I am not really liking the idea of cracking open the engine again, even though I am getting a bit too good at it....but apparently not well enough to make it actually work right. As opposed to mucking around with red hearings and wild goose chases, I figured I would just ask again. And yes, I have been reviewing the archives already. TIA Thanks Chris Barber Houston. ------=_NextPart_000_0009_01CC427C.9AC436B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Chris,

Is there a possibility that your = pickup is sucking air?  With the conversion concepts plate, I had to add a = half inch spacer to the pickup to make it reach the bottom of the pan.  If = you did this, you may be leaking air around the pickup at one of the two joints = on top and bottom of the spacer..  If you do, it will not pump much = oil.  You could put some kind of pookie around the joints to temporarily seal them = to see if there is a leak.  It that solves the problem you would need to = remove the pan again and fix the seal.  If it doesn’t you would still = have to remove the pan to remove the temporary = pookie.

Probably make more sense if you = just assumed a leak and sealed it really well and put the oil pan back = on.  If it fixes it…Yay!!!

 

Bill B

 

From: = Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On Behalf Of = Chris Barber
Sent: Thursday, July 14, = 2011 7:52 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Oil Pressure Again

 

I am running 40 weight.  I am = letting the oil warm up but hesitate running too long since the pressure is = low.

 

Chris

From: = Rotary motors in aircraft [flyrotary@lancaironline.net] on = behalf of Chris Barber [cbarber@texasattorney.net]
Sent: Thursday, July 14, = 2011 6:46 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Oil = Pressure Again

I hesitate asking about this again, but = I am too close to possibly flying to drop the ball too much now.  I have = a drop in oil pressure again.  It has dropped from the high 60's or = so to between 20 psi to 40 psi (20 to 30 at lower RPM and only up to around = 40+ as I increase power).

 

My first thought was that it was the = front o-ring and silicone ring in the front cover. So, I pulled the front pan = and replaced it.  I also was able to check the front pressure port and = the oil pump chain/key/washer etc and all was good.

 

I am about to have to pull the engine to = check the bottom of the engine for the oil pick up and rear port (after = checking the hoses, but I would thinking a blockage, depending on where it = is, would increase pressure).  One of the disadvantages of the = Conversion Concepts mount is that I pretty much have to pull the engine to check = the bottom end.

 

My question is, other than the mentioned = items, what else could cause this sort of drop.  I have hooked up a mechanical pressure gage (instead of the RWS EM2).  My = concern is that it may be the front bearing as it was the only part I recall = being closer to being out of spec.  I hate the idea of having to tear = down the engine again to replace this part especially since the engine is = running all but perfectly and I was doing squawks preparing for my DAR = inspection before this issue crept up.

 

Also, even though I can't think of a = way, is there any way to replace the front stationary gear/bearing without cracking the engine...just had to ask as I am not really liking the idea = of cracking open the engine again, even though I am getting a bit too good = at it....but apparently not well enough to make it actually work = right.

 

As opposed to mucking around with = red hearings and wild goose chases, I figured I would just ask again.  = And yes, I have been reviewing the archives already. =

 

TIA

 

Thanks

 

Chris = Barber

Houston<= /font>.

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